Wind Energy Research_Zhang_Mingming_china.pdf

8/10/2019 Wind Energy Research_Zhang_Mingming_china.pdf

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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

Key Lab of Wind Energy Research


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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


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.


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;



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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


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.



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B. Bionics based TechniquesTo reduce skin frict ion drag due to sand storm, icing and

insects accumulation on blade surface.


Leading edge protuberanceShark skin

Non-smooth surface

Sand Storm andicing area


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C. Wind Turbine Aerodynamics in a Wind Farm


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.


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



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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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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



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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



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Master-plug Manufacture

High precision 3D Master-plug

of 1.5MW blade manufactured

by NC machine.



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Manufacture of Mirror Mould Heated by Water



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2MW Blade Production



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2MW Prototype Blade



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Turbine Blade TestTurbine Blade Test



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A.Blade Damage under Extreme Condition

Experiment

Simulation



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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)


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!


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