| 微型飞行器小展弦比薄翼流场中的翼尖涡特性分析 |
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| 引用本文： | 宋书恒,朱国林,张树海.微型飞行器小展弦比薄翼流场中的翼尖涡特性分析[J].空气动力学学报,2008,26(3). |
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| 作者姓名： | 宋书恒 朱国林 张树海 |
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| 作者单位： | 中国空气动力研究与发展中心,四川,绵阳,621000 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用虚拟压缩方法求解三维不可压缩N-S方程,数值模拟了无弯度、有弯度两类微型飞行器低雷诺数小展弦比薄翼的流场,将得到的结果与实验进行了对比,数据间吻合较好.然后在此基础上分析了小展弦比薄翼的气动力特性,详细研究了小展弦比薄翼流场中翼尖涡的涡态结构及形成规律,在对小展弦比薄翼流场尾迹区的翼尖涡采用近似模型的基础上,对尾迹区翼尖涡的强度进行了分析.结果表明,翼尖涡是影响小展弦比薄翼气动力和流动分离特性的一个重要因素.
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| 关 键 词： | 虚拟压缩方法 微型飞行器 小展弦比薄翼 低雷诺数 翼尖涡 |
Analysis of wingtip vortex characteristics in flows around low-aspect-ratio thin wings for micro air vehicles |
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| SONG Shu-heng,ZHU Guo-lin,ZHANG Shu-hai.Analysis of wingtip vortex characteristics in flows around low-aspect-ratio thin wings for micro air vehicles[J].Acta Aerodynamica Sinica,2008,26(3). |
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| Authors: | SONG Shu-heng ZHU Guo-lin ZHANG Shu-hai |
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| Abstract: | The three-dimensional incompressible Navier-Stokes equations are solved by artificial compressibility approach,the flows around two kinds of low-aspect-ratio thin wings for Micro Air Vehicles,flat and cambered,are simulated at low Reynolds number,numerical results agree well with the experimental data.Then the aerodynamic characteristics of low-aspect-ratio thin wings are analyzed,The structure and formation of wingtip vortex in flows around low-aspect-ratio thin wings are studied in all details.Based on the approximate model of wingtip vortex,the strength of wingtip vortex in wake region of low-aspect-ratio wings flows is also analyzed.Results show that wingtip vortex is an important factor to affect the aerodynamics and flow separation of low-aspect-ratio thin wings. |
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| Keywords: | artificial compressibility approach micro air vehicles low-aspect-ratio thin wings low Reynolds number wingtip vortex |
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