| 引用本文: | 黄伟,柳军,罗世彬,等.粘性对高超声速飞行器攻角特性影响研究.[J].国防科技大学学报,2008,30(5):15-19.[点击复制] |
| HUANG Wei,LIU Jun,LUO Shibin,et al.Numerical Simulation of the Effect of Viscosity on the Performance of Hypersonic Vehicle[J].Journal of National University of Defense Technology,2008,30(5):15-19[点击复制] |
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| 粘性对高超声速飞行器攻角特性影响研究 |
| 黄伟, 柳军, 罗世彬, 王振国 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 采用二维耦合隐式NS方程和标准 k-ε湍流模型对高超声速飞行器在进气道关闭、发动机通流以及发动机点火工作状态下的内外流场进行了数值仿真研究，离散采用二阶迎风格式，分析了在不同攻角 (-10°～7°) 条件下，粘性对处于三种不同的工作状态下高超声速飞行器升力特性、阻力特性以及俯仰力矩特性的影响。结果表明，粘性对处于发动机通流和发动机点火工作状态下的飞行器气动-推进性能影响显著，尤其是阻力特性，粘性阻力占总阻力的比重超过50%。 |
| 关键词: 高超声速飞行器 粘性 升力特性 阻力特性 俯仰力矩特性 |
| DOI： |
| 投稿日期：2008-03-25 |
| 基金项目:国防科技大学优秀研究生创新资助项目(B070101)；湖南省研究生创新资助项目 |
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| Numerical Simulation of the Effect of Viscosity on the Performance of Hypersonic Vehicle |
| HUANG Wei, LIU Jun, LUO Shibin, WANG Zhenguo |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Two-dimension coupled implicit Navier-Stokes equations and standard k-εviscid model are introduced to simulate the inner and outer flow field of hypersonic vehicle, and the equations are discretized by the second order upwind scheme. When angle of attack is changing from -10°to 7°, the effects of viscosity on the lift, drag force and pitching moment characteristics of hypersonic vehicle in three working conditions including inlet closed, inlet open but unfired, inlet open and fired were discussed. Result shows that the influence is prominent when hypersonic vehicle works under inlet open but unfired、inlet open and fired conditions. especially This case will occur when the drag force characteristic, viscous drag force exceeds 50% of total drag force. |
| Keywords: hypersonic vehicle viscosity lift force characteristic drag force characteristic pitching moment characteristic |
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