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Introduction to R&D at IETIntroduction to R&D at IET
Key Laboratory of Wind Energy ResearchKey Laboratory of Wind Energy ResearchInstitution of Engineering ThermophysicsInstitution of Engineering Thermophysics
Chinese Academy of SciencesChinese Academy of Sciences
Mingming ZhangMingming Zhang
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Contents
Fundamental Research Previous work
Future work
HuaYi Wind Turbine Blade R&D Co. Ltd
Turbine Blade Test
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Fundamental ResearchFundamental Research
--Previous WorkPrevious Work
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A.A. Optimum Design of AirfoilOptimum Design of Airfoil
Family for Wind TurbineFamily for Wind Turbine
Design procedure of CAS airfoil family
Schematic of CAS Airfoil Family
150 180
210250
Typical comparisons in airfoil performance
Advantages of CAS airfoi l family
High lift/drag ratio
Stable stall characteristics
Insensitive to the roughness at airfoil
leading edge
original airfoil
Parametric airfoil
Database sampling
Genetic arithmetic
polynomial
CFDParameter control
ANN
Asympotic polynomial
Results filtering
Final airfoil
Multi-objectsdefinition
original airfoil
Parametric airfoil
Database sampling
Genetic arithmetic
polynomial
CFDParameter control
ANN
Asympotic polynomial
Results filtering
Final airfoil
Multi-objectsdefinition
Key Lab of Wind Energy Research
maximum
thickness
thickness
Re106 Clmax() Clmax() Cl/Cdmax()
CAS-W1-
250 25% 0.6% 3.0 1.7(15) 1.66(15) 157.6(6)Ris-A1-
24* 24% 1.0% 2.75 1 .48(14.2) 1.19 157(7)
Ris-B1-
24* 2 4% 0.7% 1.60 1.62(14.2) 1.1 73(7)
Ris-P-24 24% 1.0% 2.75 1.48(14) 1.17 156(6)
DU 91-W2-
250 25% 0.7% 3.00 1.37(9.23) 1.217 128(7)
maximum
thickness
thickness
Re106 Clmax() Clmax() Cl/Cdmax()
CAS-W1-
250 25% 0.6% 3.0 1.7(15) 1.66(15) 157.6(6)Ris-A1-
24* 24% 1.0% 2.75 1 .48(14.2) 1.19 157(7)
Ris-B1-
24* 2 4% 0.7% 1.60 1.62(14.2) 1.1 73(7)
Ris-P-24 24% 1.0% 2.75 1.48(14) 1.17 156(6)
DU 91-W2-
250 25% 0.7% 3.00 1.37(9.23) 1.217 128(7)
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Design of Blade with Blunt Trailing Edge
Method:
1Change thickness ratio on both sides of mid arc;2Change distribution curve of thickness;
3Rigidly rotating top and bottom arcs.
Key Lab of Wind Energy Research
New curve after rotating 3 deg
New curve after modifying leading edge
Original airfoil curve
Schematic of rotation and leading edge modification
Cl f or blunt airf oil L/D f or blunt airf oil
Geometry comparison for trailin g edge curve
Effect of airfoil thickness on Cl Effect of airfoil thickness on L/D
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C. Aero-acoustics of Wind Turbine Blade
Noises Source:
(1) Trailing edge noise
(2) Blade tip noise
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Computations concerned with blade aero-acoustics
Research Contents
Vortex method based CFD relative
to non-stationary flow field and
aeroelasticity on rotating 2D
airfoil;
Based on Crow method, calculatingthe radiated noise in the far
field;
Investigation of interaction
between large blade flexible
deformation and vortices;
Key Lab of Wind Energy Research
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Vortex
Generator
Mechanism using VG
D. Research on Flow Separation Control on TurbineBlade
To study effect of some parameters of VG e g shape size
locationandattackangle on airfoil aerodynamics
Key Lab of Wind Energy Research
Stalled area Vortex Generator
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Typical results
VGs configuration
Streamlines near VGs
Without VGs
With VGs
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Fundamental ResearchFundamental Research
--Future WorkFuture Work
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A. Wind Field Simulation
Wind field modeling over complex terrains in
China;
Wind resource evaluation;
Turbine micro-sitting;
Optimum wind turbine selection based on
wind climate near location of turbine and
corresponding turbine cost.
Key Lab of Wind Energy Research
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B. Bionics based TechniquesTo reduce skin frict ion drag due to sand storm, icing and
insects accumulation on blade surface.
Key Lab of Wind Energy Research
Leading edge protuberanceShark skin
Non-smooth surface
Sand Storm andicing area
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C. Wind Turbine Aerodynamics in a Wind Farm
Key Lab of Wind Energy Research
Wind turbine aerodynamics
in a wind farm including
effects of wake and terrain;
Optimization of wind
turbines in a wind farm;
Optimal layout design of
wind farm.
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D. Development of Wind Turbine at Low Wind
Speed
Wind turbine R&D at low wind speed area in China is rather necessary.
Key Lab of Wind Energy Research
ow wind
speed in
lmost re
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E. Offshore Wind TurbineCurrently, research on 5MW turbine is under way.
Turbine StyleVertical or Horizontal?
Blade#One, two or th ree?
SupporterOne, three piles or
floating supporter?
Blade Design
Based on
compl icated Wind-wave-atmosphere-
blade interaction?
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HuaYi Wind Turbine Blade R&D Co. Ltd
Key Lab of Wind Energy Research
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Key Lab of Wind Energy Research
HuaYi Wind Turbine Blade R&D Co. Ltd.
Located in Baoding, Hebei, China.
Set up by Chinese Academy of Sciences, Chinese Wind
Power Society, etc, in October 2005.
R&D Work at HuaYi
Basic Research Aerodynamic
Aeroelastic
Acoustic
Structural dynamic
CFD&FEM
Design/Manufacture/Test Aerodynamic design
Structural design
Master-plug
Design/Manufacture
Mould design/manufacture Resin infusion technology
Test & Certification
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Key Lab of Wind Energy Research
Blade Design
850kW, 1.0MW, and 1.2MW wind turbine blade design 1.5/2.0 MW prototype blade
2.5/3.0 MW Project
Length of blade
Chord
Pitch
Angle
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High Efficiency Design
Key Lab of Wind Energy Research
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Research on Airfoil
attack angle
Cl
-20 -10 0 10 20 30 40 50 60-1
-0.5
0
0.5
1
1.5
2
Cd
Cl
-0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4-1
-0.5
0
0.5
1
1.5
2
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Typical CFD Based Research
Key Lab of Wind Energy Research
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Master-plug Manufacture
High precision 3D Master-plug
of 1.5MW blade manufactured
by NC machine.
Key Lab of Wind Energy Research
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Manufacture of Mirror Mould Heated by Water
Key Lab of Wind Energy Research
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2MW Blade Production
Key Lab of Wind Energy Research
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2MW Prototype Blade
Key Lab of Wind Energy Research
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Turbine Blade TestTurbine Blade Test
Key Lab of Wind Energy Research
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A.Blade Damage under Extreme Condition
Experiment
Simulation
Key Lab of Wind Energy Research
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B. Investigation of Blade Structural Dynamic
Focusing on structural modes
using both measurement and
simulation
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D. Field Test
This is the most important phase forblade test, under which we may:
get the whole structural
performance of blade;
understand the damage physicsunder various working condition;
accumulate knowledge on blade
aerodynamic to improve design
model and test model.
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E. National Blade Test Center (under construction)
Key Lab of Wind Energy Research
Main Purpose
By building a series of advanced blade test facilities and conducting research anddevelopment work, the first international blade test system in China will be set up in
order to guarantee the effective and healthy development of wind turbine industry in
China.
LayoutTotal construction
area: 18000 m2.
Maximum test
length of blade:
70 m and 100
(potential).
Blade stack area
Blade test area
Auxi liary area
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Research Group
Group Leader:
Prof. Jianzhong Xu
Key members:
Prof. Xiaolu Zhao Asso. Prof. Zhenbin Chen
Prof. Mingming Zhang Dr. Qingjun Zhao
Prof. ChunQing Tan Dr. Fei Tang
Prof. Jianyi Du Dr. Bing Yang
Prof. Zhenming Wang Mr. Kezhong ShiAsso. Prof. Ke Yang Mr. Zhongzhu Zhang
Asso. Prof. Yu Xu Mr. Huojun Mao
Asso. Prof. Huishe Wang Mr. Xiaoming Rong
Other staffs and engineers:
13 Peoples
Students:
17 Ph.D. and 4 Master
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Thanks for your attention!
Key Lab of Wind Energy Research