| 非定常前侧缘分离流的研究 |
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| 引用本文： | 吉州,尹协远.非定常前侧缘分离流的研究[J].航空学报,1995,16(6):641-646. |
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| 作者姓名： | 吉州 尹协远 |
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| 作者单位： | 西北工业大学翼型研究中心!西安，710072，中国科学技术大学力学系!合肥，230026 |
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| 摘 要： | 采用非定常涡格法 ,计算了三角形和矩形薄翼突冲起动和等速上仰这两种常见的非定常运动 ,得到了前 (侧 )缘分离涡及尾涡非定常卷起的流动图象及气动特性。分析了展弦比和攻角的影响。等速上仰的计算结果显示 ,仰起的动态过程能明显抑制分离涡面的破碎倾向 ,提高升力系数。计算结果和已有实验结果相比吻合良好
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| 关 键 词： | 涡格法 非定常流 三角翼 脱体涡 分离流 |
ANALYSIS OF UNSTEADY LEADING/SIDE-EDGE SEPARATED FLOW |
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| Ji Zhou.ANALYSIS OF UNSTEADY LEADING/SIDE-EDGE SEPARATED FLOW[J].Acta Aeronautica et Astronautica Sinica,1995,16(6):641-646. |
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| Authors: | Ji Zhou |
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| Institution: | 1. Department of Mechanics,University of Science and Technology,Hefei,230026;2. Center of Aerodynam ics Design and Research, North western Polytechnical University, Xi’an, 710072 |
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| Abstract: | With unsteady vortex lattice method(VLM),impulsive starting and upward ramp motion at constant angular rate are calculated for delta and rectangular wings. The results include unsteady pattern of leading/side edge vortex rollup and aerodynamic characteristics. Effects of the aspect ratio and angle of attack are analysed. Simulation results show that the upward ramp motion can significantly restrain the vortex breakdown and increase the lift coefficient.Present results are in convincing accordance with available experiments. |
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| Keywords: | vortex lattice method unsteady flow delta wings trapped vortices |
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