| 引用本文: | 张俊韬,侯中喜,郭正.经纬网络充气机翼构形特征与气动性能分析.[J].国防科技大学学报,2015,37(4):36-44.[点击复制] |
| ZHANG Juntao,HOU Zhongxi,GUO Zheng.Analysis of configuration characteristics and aerodynamic performance on longitude-latitude network inflatable wings[J].Journal of National University of Defense Technology,2015,37(4):36-44[点击复制] |
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| 经纬网络充气机翼构形特征与气动性能分析 |
| 张俊韬, 侯中喜, 郭正 |
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(国防科技大学 航天科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 将充气机翼应用于临近空间太阳能飞行器是具有创新性的设计概念。针对充气机翼构形特征和气动分析的相关问题，对构形特征进行分析和设计，并建立经纬网络充气机翼的模型；进一步运用数值方法，通过与标准翼型对比，分析二维充气机翼、三维经纬网络充气机翼的气动性能。数值分析结果表明，在设计的雷诺数条件下，充气机翼的气动性能相比于标准翼型有所降低。在此基础上，结合对流场结构和流动机理的研究，分析出导致充气机翼总阻力系数明显增加的主要原因是：充气机翼表面许多凹陷的局部区域所形成的涡结构，导致局部的摩阻有小幅的减小，但压差阻力大幅增加，最终使得总的气动性能有所降低。 |
| 关键词: 充气机翼 构形特征 气动性能 流动机理 |
| DOI：10.11887/j.cn.201504007 |
| 投稿日期：2015-03-31 |
| 基金项目:航空科学基金资助项目（20145788006） |
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| Analysis of configuration characteristics and aerodynamic performance on longitude-latitude network inflatable wings |
| ZHANG Juntao, HOU Zhongxi, GUO Zheng |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The inflatable wing is a good innovational conception for the near space solar-powered aircraft. The problems of configuration characteristics and aerodynamic analysis of inflatable wings were taken as the aim of the current study. First, configuration characteristics were analyzed and designed. Then the model of 3d network inflatable wing was developed. With computational fluid dynamics method, aerodynamic performances of 2d inflatable wing profile and 3d network inflatable wing were studied. Numerical simulation result shows that the aerodynamic performances of 2d inflatable wing profile and 3d network inflatable wing have reduced slightly at the design Reynolds number. Meanwhile, with the structure of flow field and mechanism analysis, the reason for the total drag coefficients of inflatable wings increasing significantly lies in that, in those bumpy areas of the inflatable wing, vortexes which cause the friction drag has a reduction in some extent, but the pressure drag has a significant increase, so the total aerodynamic performance decreases. |
| Keywords: inflatable wings configuration characteristic aerodynamic performance flow mechanism |
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