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论文:2014,Vol:32,Issue(2):163-168 |
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引用本文： |
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王科雷, 周洲, 甘文彪, 许晓平. 太阳能无人机低雷诺数翼型气动特性研究[J]. 西北工业大学 |
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Wang Kelei, Zhou Zhou, Gan Wenbiao, Xu Xiaoping. Studying Aerodynamic Performances of the Low-Reynolds-Number Airfoil of Solar Energy UAV[J]. Northwestern polytechnical university |
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| 太阳能无人机低雷诺数翼型气动特性研究 |
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| 王科雷, 周洲, 甘文彪, 许晓平 |
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| 西北工业大学 无人机特种技术重点实验室, 陕西 西安 710065 |
| 摘要: |
| 以高空低速太阳能无人机翼型研究为背景,对大弯度高升力翼型在一定雷诺数范围内的流动特性进行了研究。采用求解k-kl-w湍流模型的雷诺平均N-S方程有限体积法,对SD7037翼型进行了数值模拟,在排除网格效应影响的基础上,针对较大范围内的低雷诺数复杂流动问题,验证了该湍流模型的适用性与准确性;针对翼型受力特性,分析了气动力随雷诺数变化的趋势;基于典型雷诺数下翼型绕流结构变化,研究了翼型产生高升力的流动特征;通过进一步研究升力非线性特征,揭示了较大迎角下翼型失速特征的流动机理。 |
| 关键词:
低雷诺数
气动性能
流动机理
非线性
失速
分离
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| Studying Aerodynamic Performances of the Low-Reynolds-Number Airfoil of Solar Energy UAV |
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| Wang Kelei, Zhou Zhou, Gan Wenbiao, Xu Xiaoping |
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| Science and Technology on UAV Laboratory, Northwestern Polytechnical University, Xi'an 710065, China |
| Abstract: |
| In order to develop high attitude and low speed solar energy UAV, numerical computations of airfoil were used to analyze the aerodynamic characteristics of high-lift airfoil with high camber in a range of low Reynolds num-ber. Finite volume method and transition k-kl-w turbulence model were used to solve the 2D Reynolds-averaged Navier-Stokes equations. To prove the accuracy of this method, the SD7037 airfoil was selected to undergo an anal-ysis of influences caused by different types of grids and undergo a verification between the numerical results and ex-perimental results. We conducted a detailed analysis of aerodynamic forces and summarized their trends of variation with Reynolds number, then studied the characters of the flow at representative Reynolds numbers and explained the reasons of high lift, and at last, through studying the nonlinear characteristics of the lift discussed the flow mechanism of the stall of the airfoil at large relative angle of attack. |
| Key words:
aerodynamic stalling
airfoils
angle of attack
computer software
drag coefficient
experiments
finite volume method
flow separation
lift
lift drag ratio
mesh generation
Navier-Stokes equations
numerical methods
Reynolds number
solar energy
turbulence models
two dimensional
unmanned aerial vehicles(UAV)
vortex flow
aerodynamic performance
flow mechanisms
low Reynolds numbe
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| 收稿日期: 2013-04-23
修回日期:
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| DOI: |
| 基金项目: 西北工业大学基础研究基金(JCT20130110)资助 |
| 通讯作者:
Email： |
| 作者简介: 王科雷(1991-),西北工业大学硕士研究生,主要从事飞行器设计及气动布局设计研究。
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