Joaquin CastroHSABP TC Chair

2010-12

HighSpeed TimesNewsletter of the AIAA High Speed Air Breathing Propulsion Technical Committee

No. 2, Issue 2 – July 2011

This issueVision from the Chair p.3

Large Eddy Simulation Studies in Italy p 5Awards & Honors p. 7-8

Fundamental Aeronautics Review p.9In the Spotlight p.10-11

Engine Design: A New Course p.12TriJet: Aerojet’s TBCC Concept p.13

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

AIAA High Speed Air Breathing Propulsion Technical Committee (HSABPTC),bringing together experts in the field who are dedicated to promoting its scienceand technology through education and dissemination of scientific ideas.

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https://info.aiaa.org/tac/PEG/HSABPTC/default.aspx

HSABP TC Membership

Vision from the Chair

Joaquin CastroAIAA High Speed Air Breathing Propulsion Technical Committee

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

The heat of summer has a grip on the country, and as it is JPC time again, most of us are lookingforward to a week of “cool” Southern California weather. JPC gives us an opportunity to share our workwith colleagues, make new friends and refresh acquaintances with old friends.

Our High Speed Air Breathing Propulsion technology community continues to make progresstowards maturation into operational systems. Our members continue to further the understanding ofthe physics that affect high speed flight and evolve our analytical tools. Our newsletter coversexamples of both domestic and international efforts in this area. Look in pages 5 and 6 for someexcellent work on Large Eddie Simulations in high speed flows being done in Italy by HSABP TCinternational members Antonella Ingenito and Claudio Bruno. In page 13, Dora Musielak, our HSABPTC Communications Subcommittee Chair and Newsletter Editor, provides an excellent summary of theTriJet, an Aerojet high speed combined cycle propulsion concept.

Look under the “Spotlight” section of our Newsletter for the Air Breathing Propulsion Awardwinners in both Industry and Academia for 2011,as well as our best HSPABP TC Paper Award. At JPC,take the opportunity to meet, congratulate and share ideas with these deserving members or ourcommunity.

The X-51A Dual Mode Ram Jet (DMRJ) had its second flight last month and, as reported by themedia, did not complete its mission successfully, as it encountered some difficulties during the DMRJstart transient. The program team is busy reviewing the copious amounts of data collected during theflight, and I trust it will fly again soon, better for the lessons learned and the understanding gained bythe experience. See, I believe that we learn more when we experience challenges than wheneverything works as planned; after all, that is why we call it technology development…

Finally, our nation is experiencing some unsettling fiscal challenges, and the resulting shockwaves (no pun intended) are affecting the funding for many of our programs. These challenges cancreate new prospects. It is now more important that we take the opportunity to share the benefits ofour technology with our constituencies. As AIAA and HSABP TC members, you are a leader in ourIndustry, and you should help explain the contributions and benefits that high speed propulsionsystems can bring to our military, to civil transportation, and to access to space. You should helpexplain the related benefits that the gained understanding in physics, simulation, analysis, materials,and systems engineering can also bring to the average individual and society.

As engineers, we often tend to speak in technical terms that are not always fully understood bythose with differing backgrounds and interests. When you share the message of the benefits of ourtechnology, know your audience. Share your message in terms that your audience can relate to, makesure they understand and instill in them the same passion you have for this great work we do and itsbenefits for mankind.

The future is ours to shape, see you in San Diego!

As part of our commitment to support AIAA and STEM education, Dora Musielakrepresented the HSABPTC as a judge and session chair at the 2011 AIAA Region IV Student Conference, which was held on April 30, 2011 in Arlington, Texas.

This conference for undergraduate and graduate students provides a unique forum forfuture professionals to present their research work outside the classroom and also avaluable networking opportunity to meet fellow students and potential employers.Students came from universities in Arkansas, Louisiana, New Mexico, and Texas. Faculty,engineers and other professionals from NASA, Lockheed Martin and local aerospaceindustry were also in attendance.

The technical papers and the oral presentations of the students are judged for theirtechnical merit and delivery. The students compete either as individuals or as a team.Judging these competitions was extremely difficult because of the quality of the papers inthe competition and also because the students come prepared, making outstanding oralpresentations. Some even brought prototypes of the hardware that they designed andbuilt.

Each first place winner received a $500 and an invitation to the AIAA FoundationInternational Student Conference, to be held in conjunction with the 50th AIAAAerospace Sciences Meeting, January 9–12, 2012, at the Gaylord Opryland Resort,Nashville, Tenn., where students will compete for a prize of $1,000.

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Link up Through LinkedIn! A great way to make connections with other members of the aerospace

and propulsion community is through AIAA’s LinkedIn group. The group, available only to active AIAA members, is your “one-stop” forum for networking with other AIAA members, gaining insight into the day's aerospace headlines, discovering employment opportunities within the community, and learning new information about AIAA events. Link up with AIAA LinkedIn today!

You may also follow AIAA News on www.twitter.com/aiaa_news, get connected with other AIAA members via AIAA's Facebook page, or view AIAA videos on AIAA's YouTube channel.

Liaison Sub Committee Activities

Balu SekarHSABPTC Liaison

Welcome New Members!Antonella Ingenito – University of Rome Jeff Dalton – Avetec, Inc.

Bradley Leland – Lockheed Martin Jeff White – NASA Langley

Daniel Macinnis – Raytheon Kristen Roberts – Lockheed Martin

Gillian Bussey – University of Maryland Orval “Rusty” Powell – Kirtland AFB

By Antonella Ingenito - AIAA HSABPTC International Member

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Figure 2. Tilting of span-wise vorticity

on planes parallel to the main direction

of motion.

Figure 1. Average vorticity on parallel

planes for injectors of the HyShot II

combustor

In Europe, many research groups are working in high speed air-breathing propulsion under research contracts sponsored bynational agencies, the European Space Agency and by otherorganizations. Several groups are conducting numerical andexperimental investigations of supersonic combustion. In fact,in spite of the large body of research to date on supersoniccombustion, some issues remain to be resolved. For example,mixing of fuel and air, high speed chemical reaction, and thecoupling between turbulence, compressibility and combustionare topics that remain open for investigation. Researchers underthe direction of Professor C. Bruno at the University of Rome areconducting computational simulation studies to advance ourunderstanding of combustion physics.

A recent Large Eddy Simulation (LES) study of the Hyshot IItest, performed by Ingenito at the University of Rome “LaSapienza,” showed that compressibility affects the turbulenceenergy transfer from large to small scales, and that this effect ismore or less important depending on Mach number. Wherecompressible effects are higher, the scaling is steeper than inthe subsonic regime, with a slight deviation from that predictedby the Kolmogorov’s theory. This suggests that in supersonicflows, the dissipative eddies are larger than those predicted forsubsonic flows.

LES studies conducted by Ingenito et al. showed that thelarger dissipative scales are mainly due to the contribution ofthe baroclinic term in the transport equation that is rather high,of order 1012 rads-2, pumping vorticity within the airstream thatincreases, for example, from 0 at the H2 orifice exit to ~106 Hzimmediately after the H2 jet penetrates the air core flow.Representative simulation results are shown in Figs. 1 and 2.

These results are important in scramjet applications becauseof the need to mix and burn fuel in a very short time. In fact,with larger dissipative scales, fuel and oxidizer are mixed atmolecular scales and combustion can take place at these largerscales. This has consequences also on the chemical reactionbecause in supersonic combustion flames, smaller eddies maybecome larger than the flame thickness.

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Large Eddie Simulation Studies at the University of Rome

Continue on page 6

Consequently, the smallest vortices can only wrinkle the flame without entering it. This important findingsuggests that numerical modeling must take into account different scaling laws to predict at which lengthscales a Sub Grid Scale model must be implemented. This conclusion has important implications both fromnumerical and from physical points of view. In fact, larger dissipative structures require modeling a lowernumber of scales than in subsonic flow. Furthermore, this can affect the flame structure.

These simulations were obtained using HeaRT, a high order numerical code. HeaRT (Heat Release andTurbulence) is a LES code capable of simulating unsteady turbulent flows that are either reactive or non-reactive, with high or low Mach numbers. The HeaRT code has shown excellent, nearly linear scalability.HeaRT is an in-house computer code developed at the Italian National Agency for New Technologies,Energy and Sustainable Economical Development (ENEA). The high performance computing capability inthe Modeling and Simulation Laboratory at ENEA consists of a cluster with up to 2048 processors,available for computational experiments. This work is funded by the European Union.

More information on this and other work is available on the laboratory website:http://www.zeroemission.enea.it/risorse-en-en/modellistica-e-simulazione-della-combustione

Dr. Antonella Ingenito teaches Liquid Rocket Engine at the Aerospace Engineering School of theUniversity of Rome “La Sapienza”. She has research interests in air breathing propulsion, micro-thrustersand advanced space propulsion. Dr. Ingenito is an international member of the AIAA High Speed AirBreathing Propulsion Technical Committee.

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Large Eddie Simulation Studies (continued)

Advanced Propulsion Systems and Technologies, Today to 2020Edited by Claudio Bruno and Antonio Accettura

223, Progress in Astronautics and Aeronautics Series, Vol. 223 Published by AIAA, © 2008, 460 pages, Hardback ISBN-10: 1-56347-929-X and ISBN-13: 978-1-56347-929-8

Commissioned by the European Space Agency, this book details specific propulsiontechnologies as envisioned by 2020. Each technology has been considered in terms ofconcept, associated key technologies, development status, and proposed roadmaps.The reader is led through all the steps that propulsion will likely take between nowand the 2020s in a clear, concise, and detailed way, including market and feasibilityperspectives when applicable. The 16 chapters follow a developmental logic. Thematerial starts with the future of solid rocket motors, grounded on R&D done atpresent, and describes the development of LOX/HC liquid rocket engines, atechnology based on U.S. and Russian work of the ’60s and ’70s. It then looks intofuture technologies, and systems just beginning to make their impact felt now, suchas superconductivity applied to electric propulsion, MW-class ion engines (perhapsutilizing a nuclear power source), solar sails, laser propulsion, nuclear propulsion(such as the promising VASIMR), and ISRU.

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Dr. James L. Mace, Technical fellow, The Boeing Company, St. Louis, Mo., will receive the 2011AIAA Air Breathing Propulsion Award. The award is presented for meritorious accomplishmentsin the arts, sciences, and technology of air breathing propulsion systems. Dr. Mace is beingrecognized for unique and sustained contributions to the advancement of technology ofintegrated aircraft propulsion systems and their interdisciplinary design, analysis, and test.

Dr. Mace has worked in aircraft propulsion for 40 years in the areas of inlet and nozzle design,testing, and related CFD. Currently, he has responsibility for leadership of inlet research, bothin-house and contracted, for Boeing Defense, Space and Security in St Louis, Missouri. Hereceived his BSAE and MSAE from The Ohio State University, and his Ph.D. from the Universityof Michigan.

Dr. Mace has been Program Manager / Investigator on over 30 technology developmentprograms, including Boeing IRADs leading to development of the waverider-inlet technologybase implemented on the F/A-18E/F aircraft. More recently, he has directed IRADs leading tothe technology base for compact inlet systems such as used on Boeing’s X45 series of aircraft.He has managed contracted inlet technology development efforts ranging from advanced 2Dexhaust systems to mixed-compression inlet designs for high-speed aircraft.

Dr. Mace spent 13 years at Air Force Flight Dynamics Laboratory in Dayton, Ohio, both in theAirframe / Propulsion Integration Group and Computational Fluid Dynamics Group. He receivedthe Engineer of TheYear Award for the Laboratory in 1984.

Dr. Mace is an Associate Fellow of the AIAA and an Associate Editor for the Journal ofPropulsion and Power. He currently is a member of the SAE S-16 Turbine Engine Inlet FlowDistortion Subcommittee. Some of us remember Jim as he served as Chairman of the AirBreathing Propulsion Technical Committee for many years, for which he was given thechairmen’s award by Jeff Hamstra, and then Tom Kaemming replaced him. We are proud to seeDr. James Mace as this year’s winner of the AIAA Air Breathing Propulsion Award.

Dr. James MaceTechnical Fellow

The Boeing Company

2011 AIAA Air Breathing Propulsion Award

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2011 AIAA HSABPTC Best Paper Award

This award recognizes the best technical paper presented in a High Speed Air-breathing

Propulsion technical session at the J. Propulsion Conference and the Aerospace Sciences

Meeting. Each session Chair submits a nomination for this award. The 2011 High Speed Air

Breathing Propulsion Best Paper award recipient is

AIAA 2010-6876 “CFD Enhancements for Supersonic Combustion Simulation

with VULCAN” by F. Ladeinde, K. Alabi, T. Ladeinde, D. Davis, M. Satchell and

R.A. Baurle.

This paper was presented at the 46th AIAA/ASME/SAE/ASEE J. Propulsion Conference & Exhibit.

In this paper, the authors present the results of their effort to develop a more comprehensive CFD

code for modeling of supersonic combustion problems.

The selection committee was lead by Jim Donohue and was supported by Jinho Lee, VenkatTangiral, Balu Sekar, Dora Musielak, and John E. Bradford.

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

2011 AIAA Gordon C. Oates Air Breathing Propulsion Graduate Award

The Gordon C. Oates award recognizes outstanding graduate student research inthe field of air breathing propulsion. The award consists of a $5000 cash prize and anexpense-paid trip to the Joint Propulsion Conference. This Air Breathing PropulsionTC supported AIAA Foundation award is named in honor of the late Gordon C.Oates, a professor in the Department of Aeronautics at the University ofWashington. The award is presented at the JPC Luncheon, and the recipient isinvited to make a presentation at the Joint Airbreathing Propulsion TechnicalCommittee meeting at JPC. Additional information on the Gordon C. Oates awardin available through the AIAA web site, ABP TC web site or by contacting StephenBrock, AIAA Student Program Director (stephenb@aiaa.org).

The 2011 Gordon C. Oates Graduate student Award recipient is Mr. Sean Torrez, a Ph. D. candidate at theUniversity of Michigan. Mr. Torrez's research focus is on developing the interface between componentdesign, control systems, and vehicle design for early stage hypersonic vehicle development study. Mr.Torrez is currently working on simulation of supersonic combustion for a hypersonic vehicle.

Volunteers Needed to Support Awards and Honors

A new H&A chair is also needed for the 2012 and beyond.

Please contact Jinho Lee or Joaquin Castro, our TC Chair, if you arewilling to serve in this important role.

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

The 2011 Fundamental Aeronautics Program (FAP) Technical Conference was held March 15-17 at theRenaissance Cleveland Hotel, Cleveland OH. The technical conference serves the aeronauticscommunity as an open forum for reviewing accomplishments within the FAP. FAP is coordinated byNASA’s Aeronautics Research Mission Directorate with a mission to support research in all flightregimes that addresses challenges in air transportation.

Additional program information and a recap of the 2011 technical conference is available at theFAP home page: http://www.aeronautics.nasa.gov/fap. A CD containing more than 130 presentationsfrom the conference will be made available to conference attendees.

The FAP has established research collaborations between representatives in industry andacademia with government researchers from the four NASA Aeronautics Centers: Ames ResearchCenter, Dryden Flight Research Center, Glenn Research Center and Langley Research Center. Of thefour projects within the program, the Supersonics and Hypersonics projects include high speed airbreathing propulsion research elements.

The Tuesday morning plenary session on March 15th featured an overview of the AeronauticsResearch Mission Directorate (ARMD), an overview of the FAP, and project overviews for theSubsonic Fixed Wing, Subsonic Rotary Wing, Supersonics, and Hypersonics projects. Peter Coen,Project Manager for the Supersonics project, included on the meeting CD a bibliography of over 180FY10-FY11 project publications in areas related to high speed air breathing propulsion.

Dr. James Pittman, Langley Research Center, has served as the Project Manager for theHypersonics Project. The stated project goal is to “Develop tools and technologies to enable airbreathing access to space and large-mass entry into planetary atmospheres.” The development of airbreathing propulsion technology for a two-stage-to-orbit reference vehicle and the development ofphysics based, integrated multi-disciplinary design tools are among the technical challenges beingaddressed.

Hypersonic scale targets have been established for maturation to technology readiness level 6over the next 3 decades leading to commercial applications beginning in 2030. A number ofpartnerships in air breathing propulsion were mentioned including collaboration with the AirForce/DARPA X-51A project, HIFiRE Flight 2, Large-scale Scramjet Engine Test Technique (LSETT)and the Turbine Based Combined Cycle Test Program.

Beginning in the afternoon session on Tuesday March 15, and extending through the close of theconference at 5:00 on March 17, each of the four projects within the FAP hosted concurrent sessionswith detailed presentations in their respective areas of research. Over 70 presentations were given insessions associated with the supersonics and hypersonics projects.

NASA’s 4th Annual Fundamental AeronauticsProgram Technical Conference

By Jeff Dalton -AIAA HSABPTC Member

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Faure (Joel) is one of our Associate TC members and one of the busiest. At JPC2011 he will presenta very interesting paper to report his research at AFRL, and he will also chair 3 sessions. Joel’spaper at JPC is entitled “High Fidelity Analysis of a Generic Supersonic Combustor with a Single OpenCavity.”

In addition to his computational research on scramjet flow paths, this year Joel is the POC of aUSAF-SBIR topic FY11.2, titled: “Advanced Analysis and Design Tool for Scramjet Air-FramePropulsion Integration and Optimization.”

This topic calls for developing a multi-fidelity integrated suite of computational tools to analyzeand aid the creation of advanced scramjet flowpaths. The tool set should accept the output fromtraditional engineering design to execute from a low order RANS methodology up through today'sstate of the art high order (4th or higher) LES level analyses, solve thermal non-equilibriummechanisms, accurate sub-grids scale (SGS) models, consider conjugate heat transfer, generalfinite-rate chemistry with ease to modify data base for hydrocarbon/hydrogen-air mixtures, hightemperature and multi-phase effects, etc.

We are very proud to have Joel in our TC, as he represents the type of active member we like tohave, one that supports our efforts to promote and disseminate research findings and knowledgein high speed air breathing propulsion.

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Faure Joel Malo-Molina, Ph.D.Research Aerospace Engineer

USAF, AFRL/RBACWright-Patterson AFB OH

The AIAA HyTASP Program Committee Hypersonic Systems and Technologies Award was recently approved by the AIAA.

This new award is established to recognize sustained, outstanding contributions andachievements in the advancement of atmospheric, hypersonic flight and related technologies. Theaward is presented not more than once every 18 months to an individual who has had extended anddistinguished involvement in hypersonic research and development and, who has contributedsignificantly to the advancement of technologies associated with hypersonic atmospheric flightvehicles for scientific, civil, and/or military applications. Such advancements include any of thetechnologies underpinning hypersonic atmospheric flight such as, but not limited to:

1) Advances in vehicle performance capabilities such as speed, altitude, payload weight, flightduration, or reliability;

2) Improvements in technical understanding of hypersonic system performance, aerodynamics,propulsion, structures, materials, or controls; or

3) Improvements in operational technologies such as ground and flight systems.

New Award for Sustained Contribution to Hypersonic Technologies

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HSABP TC Represented at Two Pressure-Gain Combustion Workshops in Europe

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

• Pressure Gain Combustion Workshop, Whittle Laboratory, Cambridge, Britain, 7/8/11

A 1-day workshop on pressure-gain combustion atCambridge University, was organized by Prof. RobertMiller of Whittle Labs. It included several invited talks bythe host organization, DARPA and OEM representativesfrom R&R, P-W and GE. Dr. Venkat Tangirala (GeneralElectric Global Research Center) of our HSABP TCpresented a talk on pulse detonation engine technologydevelopment. The workshop included a tour of theWhittle Lab where advanced pressure gain combustorsare tested.

• Pressure Gain Combustion Workshop, MBDA, Bourges, France, 7/11/11 – 7/13/11

This was a 3-day workshop organized by Dr. FrancoisFalempin of MBDA, and sponsored by MBDA, USAF andONR-Global at MBDA in Bourges (France). Topicspresented include continuous rotating detonationengines (CRDEs) and pulse detonation engines (PDEs).This workshop was represented by internationalmembers of the pressure-gain combustion researchcommunity. Dr. Venkat Tangirala (General Electric GlobalResearch Center) of our HSABP TC, and Dr. GuillermoPaniagua (von Karman Institute) of GTE TC presentedtalks on pressure-gain combustors and advanced turbinetechnology development.

B. Le Naour and F. Falempin, Continuous Detonation Wave Engine, Preliminary Small Scale Demo, Pressure Gain Combustor Workshop, Bourges, France, July, 2011

M. Rose, Experimental Shock Flame Interaction Rig at DLR, Pressure Gain Combustor Workshop, Bourges, France, July, 2011

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A Practical Introduction to Preliminary Design of Air Breathing Engines, a new short course co-sponsored by GTETC and HSABPTC offered after JPC2011.

Ian Halliwell – Avetec (GTETC) and Steve Beckel – ATK (HSABPTC) have teamed up to develop acourse that defines the scope of “preliminary design” activities and illustrates how the process isdriven by mission requirements. Contact Ian or Steve for additional information.

Education

AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

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AIAA HSABP TC NEWSLETTER No. 2 Issue 2 – July 2011

TriJet: Aerojet’s New TBCC Concept

Novel combined-cycle propulsion system to achieve seamless transition from 0 to Mach 7+

Dora Musielak – HSABPTC Communications Chair

The turbine-based combined cycle (TBCC) concept is attractive for high speed applications, as it wouldmerge a turbojet with a dual-mode ramjet/scramjet. But efforts in the past to develop a high-Machturbojet failed, leaving propulsion engineers with a huge problem—how to close the gap between theM2.5 maximum speed of modern turbine engines and the M3-3.5 take-over speed of a dual-mode ramjet(DMRJ) capable of accelerating a vehicle to M6-7.

Recently Aerojet revealed a very elegant solution. As reported in the June 2011 issue of Aviation Week& Space Technology, Aerojet’s TriJet TBCC engine concept introduces a third engine, a rocketaugmented ejector ramjet (ERJ), to fill the gap between the turbojet and the DMRJ. Basically, an aircraftpowered by the TriJet would take off on turbine power then ignite the ejector ramjet to push through thetransonic drag rise and accelerate to the take-over speed for the dual-mode ramjet. What I find clever andelegant is how the operating envelopes of each of the three engines overlap to provide seamlesspropulsion.

Fig. 1– TriJet Inlet Configuration (Aerojet image)

The operation envelope of the TriJet begins at the inlet (Fig. 1, in a twin TriJet installation), which feedsall three engines. While the dual-mode ramjet has an unobstructed flowpath, the turbojet and ejectorramjet are concealed behind doors that open and close depending on the phase of flight.

Fig. 2 – TriJet, a view from above (Aerojet image)

Continue on p. 14

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AIAA HSABP TC NEWSLETTER No. 2 Issue 2 – July 2011

TriJet: Aerojet’s New TBCC Concept (continued)

From zero airspeed to above Mach 1, the inlet doors to the turbine and ERJ engines would be fullyopen and both engines would be operating to produce enough thrust to punch through the transonicdrag peak. Above M1, the doors to the turbine engine gradually close until, at M2.5, the turbojet is shutdown, purged and cocooned. The ERJ continues to provide thrust to M4+ before both inlet doors andnozzle flaps are closed.

On its own, the DMRJ begins to provide thrust around M3. But, according to Aerojet, it can be madeto produce thrust down to M2.5 by operating in sustained aerodynamic choke (SAC) mode. Opening thenozzle flaps causes the ERJ exhaust plume to choke the flow through the DRMJ. Upstream of the choke(see Fig. 4), flow is subsonic, allowing the DMRJ nozzle to be used as a ramjet combustor. Pumping fuelinto this much larger space allows both the ERJ and choked DMRJ to produce thrust from M2.5 to M4.Above that speed the ERJ nozzle flaps are closed and the DMRJ provides all the thrust.

Fig. 3 – TriJet, a view from side (Aerojet image)

The Trijet combined cycle engine is a propulsion system that has sufficient thrust in all flight regimesto accelerate the vehicle swiftly to its Mach 6+ hypersonic cruise, yet the flexibility to take off from arunway, refuel in flight, return to a powered landing and even execute a go-around.

A hydrocarbon-fueled (JP-10) 75-ft-long vehicle capable of Mach 7 cruise was selected into which tointegrate the TriJet. Range was chosen as the figure of merit for comparison with the Pyrojet, akerosene burning TBCC being developed by Aerojet and Pyrodyne. The range capabilities of the Pyrojetand TriJet are within 10% of each other.

Aerojet has stated that the technology to build the TriJet engine is mature enough to demonstratein flight. Now, all they need is the necessary funding.

Fig. 4 – Aerojet TriJet Hypersonic TBCC

AIAA High Speed Air Breathing Propulsion Technical Committee

Joaquin Castro – TC ChairMarty Bradley – Past ChairRyan Starkey – Vice Chair

https://info.aiaa.org/tac/PEG/HSABPTC/default.aspx

Meeting Schedule at JPC2011 – Marriott Hotel, San Diego, CA

Contact Us

HSABP TC Newsletter Editors :

Dora Musielak: musielak@scientist.comJeff Dalton: jdalton@avetec.org

Submit story ideas or your own article!

High Speed NewsNo. 2 Issue 2, July 2011

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AIAA HSABP TC NEWSLETTER No. 2, Issue 2 – July 2011

Date Time Meeting Room Lead

Monday Aug 1 10:00 – 11:00 HSABPTC Steering Cardiff Joaquin Castro

13:00 – 14:00 New Member Orientation

Balboa TBD

16:00 – 18:00 HSABPTCAll Members

Marina E Joaquin Castro

Tuesday Aug 2 9:00 – 10:00 ABP Education Del Mar Dan Kirk

15:00 – 16:00 ABP Communications Marina D John Sordyl

14:00 – 15:00 ABP Honors & Awards Del Mar Dave Mayer

16:00 – 17:00 HSABPTC Liaison Carlsbad Balu Sekar

19:00 – 22:00 ABP Dinner Meeting (All 3 TCs)

Marina E Jeff Hamstra