Rotor airfoil aerodynamic design method and wind tunnel test verification

The new type of shrouded wind turbine called “wind-lens turbine” has been developed. The wind-lens turbine has a brimmed diffuser called “wind-lens”, by which the wind concentration on the turbine blade and the significant enhancement of the turbine output can be achieved. A simultaneous optimization method for the aerodynamic design of rotor blade and wind-lens has been developed. The present optimal design method is based on a genetic algorithm (GA) which enables multi objective aerodynamic optimization. In the present study, aerodynamic performances and flow fields of the Pareto optimal solutions of wind-lens turbines designed by the present optimal design method have been investigated by wind-tunnel tests and three-dimensional Reynolds averaged Navier-Stokes (RANS) analyses. Output power coefficients obtained from the wind-tunnel tests in the optimal wind-lens turbine exceeded the Betz limit, which is the performance limitation for bare wind turbines. The numerical results and the experimental results show that the suppression of flow separations in the diffuser is important to achieve significant improvement in aerodynamic performances. As a result, it is found that the aerodynamic performance of wind-lens turbine is significantly affected by the interrelationship between the internal and external flow fields around the wind-lens.

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Design and experimental validation of a specialized pressure-measuring rake for blended wing body aircraft’s unconventional inner flow channel

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410020938971 ◽

2020 ◽

Vol 234 (15) ◽

pp. 2186-2196

Author(s):

Xin Xu ◽

Dawei Liu ◽

Keming Cheng ◽

Dehua Chen

Keyword(s):

Wind Tunnel ◽

Design Method ◽

Wind Tunnel Test ◽

Numerical Results ◽

Flow Channel ◽

Test Results ◽

Complex Flow ◽

Air Intake ◽

Blended Wing Body ◽

External Flows

The internal drag of the unconventional inner flow channel of blended wing body aircraft must be measured accurately to correct the air intake effect of the blended wing body flow-through model in wind tunnel tests. In this study, the pressure distribution of the inner flow channel under the interaction of internal and external flows was obtained through numerical simulation. A specialized pressure-measuring rake was designed based on the numerical results, and a validation test was conducted in a 2.4 m × 2.4 m transonic wind tunnel. Compared with the flow in traditional inlets/nozzles, the flow in the unconventional inner channel in the current research is asymmetric, the distortion index is higher, and the internal drag is more sensitive to flow changes. The wind tunnel test results have a good correlation with the numerical results, and the repeatability of the test results is satisfactory, indicating that the measurement accuracy and precision of the pressure-measuring rake are acceptable. The design method of the specialized rake is feasible, and it can be used to guide the measurement of complex flow in unconventional inner flow channels of blended wing body aircraft.

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Aerodynamic Numerical Simulation in the Process of Car Styling

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.16-19.862 ◽

2009 ◽

Vol 16-19 ◽

pp. 862-865 ◽

Cited By ~ 2

Author(s):

Ying Chao Zhang ◽

Zhe Zhang ◽

Shuang Hu Luo ◽

Jian Hua Tian

Keyword(s):

Fluid Dynamics ◽

Wind Tunnel ◽

Automotive Industry ◽

Aerodynamic Drag ◽

Wind Tunnel Test ◽

Aerodynamic Design ◽

Aerodynamic Analysis ◽

Stability Performance ◽

Aerodynamic Drag Coefficient ◽

Velocity Contour

With the development of automotive industry of China, more and more new cars are brought out. Then more and more stylists and engineers will take part in car styling to design new car. In the process of car styling, Car aerodynamics is important to its performance. Especially for more excellent handling and stability performance, more aerodynamic analysis and optimization should been done. At first it was introduced that the process of car styling in this paper. The functions of aerodynamics in the process were indicated. Secondly some ways of aerodynamic analysis were put forward. The first one is wind tunnel test and the second one called virtual wind tunnel test. The virtual wind tunnel test is one of the best modern ways of aerodynamic design which apply in the fields of aerodynamic research widely. It was based on computational fluid dynamics. The details of the virtual wind tunnel test simulation were narrated in this paper. Applying the virtual wind tunnel test aerodynamic drag coefficient, velocity contour and pressure distribution were got. Some advices to reduce aerodynamic drag of the design car were put forward. In one word, it is one simple, effective, convenient and fast way for aerodynamic design in car styling process using virtual wind tunnel test.

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Multi objective optimization of aerodynamic design of high speed railway windbreaks using Lattice Boltzmann Method and wind tunnel test results

International Journal of Rail Transportation ◽

10.1080/23248378.2018.1463873 ◽

2018 ◽

Vol 6 (3) ◽

pp. 183-201 ◽

Cited By ~ 2

Author(s):

Masoud Mohebbi ◽

Mohammad Ali Rezvani

Keyword(s):

Wind Tunnel ◽

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

High Speed ◽

Wind Tunnel Test ◽

Test Results ◽

Aerodynamic Design ◽

Multi Objective Optimization ◽

High Speed Railway ◽

Boltzmann Method

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Wind tunnel test study on wind load coefficients variation law of heliostat based on uniform design method

Solar Energy ◽

10.1016/j.solener.2019.03.082 ◽

2019 ◽

Vol 184 ◽

pp. 209-229 ◽

Cited By ~ 6

Author(s):

Qiwei Xiong ◽

Zhengnong Li ◽

Haiyin Luo ◽

Zhefei Zhao

Keyword(s):

Wind Tunnel ◽

Design Method ◽

Uniform Design ◽

Wind Tunnel Test ◽

Wind Load ◽

Test Study ◽

Uniform Design Method

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A report on the aerodynamic design and wind tunnel test of a Prop-Fan model

10.2514/6.1976-667 ◽

1976 ◽

Cited By ~ 8

Author(s):

C. ROHRBACH

Keyword(s):

Wind Tunnel ◽

Wind Tunnel Test ◽

Aerodynamic Design

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Design and Performance Evaluation of Propeller for Solar-Powered High-Altitude Long-Endurance Unmanned Aerial Vehicle

International Journal of Aerospace Engineering ◽

10.1155/2018/5782017 ◽

2018 ◽

Vol 2018 ◽

pp. 1-23 ◽

Cited By ~ 4

Author(s):

Donghun Park ◽

Yunggyo Lee ◽

Taehwan Cho ◽

Cheolwan Kim

Keyword(s):

Wind Tunnel ◽

High Altitude ◽

Test Data ◽

Design Method ◽

Wind Tunnel Test ◽

Flight Test ◽

Cfd Analysis ◽

Aerial Vehicle ◽

Solar Powered ◽

Long Endurance

Design, wind tunnel test, computational fluid dynamics (CFD) analysis, and flight test data analysis are conducted for the propeller of EAV-3, which is a solar-powered high-altitude long-endurance unmanned aerial vehicle developed by Korea Aerospace Research Institute. The blade element momentum theory, in conjunction with minimum induced loss, is used as a basic design method. Airfoil data are obtained from CFD analysis, which takes into account the low Reynolds number effect. The response surface is evaluated for design variables by using design of experiment and kriging metamodel. The optimization is based on desirability function. A wind tunnel test is conducted on the designed propeller. Numerical analyses are performed by using a commercial CFD code, and results are compared with those obtained from the design code and wind tunnel test data. Flight test data are analyzed based on several approximations and assumptions. The propeller performance is in good agreement with the numerical and measurement data in terms of tendency and behavior. The comparison of data confirms that the design method, wind tunnel test, and CFD analysis used in this study are practically useful and valid for the development of a high-altitude propeller.

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