高超声速稀薄流尖前缘平板气动性能分析  

Aerothermodynamics and Aerodynamics Analyses of Plates with Sharp Leading Edge in the Hypersonic Rarefied Flow

作　　者：张帅 方蜀州[1] 许阳 ZHANG Shuai;FANG Shuzhou;XU Yang(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学宇航学院,北京100081

出　　处：《西北工业大学学报》2020年第S01期27-34,共8页Journal of Northwestern Polytechnical University

摘　　要：采用DSMC方法对尖前缘平板在高超声速稀薄流中的气动性能进行分析。选取前缘楔角角度为10°~90°的前缘无限尖化平板以及固定楔角角度α=45°的钝化半径为0.1~0.9 mm前缘尖点钝化平板进行计算分析,旨在揭示高超声速稀薄流中楔角角度与钝化半径对尖前缘平板气动性能的影响规律和内在机理。数值结果表明,楔角角度和钝化半径对前缘流场结构的影响较为一致,这也使得楔角角度和钝化半径对平板表面气动参数的影响规律极其相似。楔角角度和钝化半径对传热系数和摩擦阻力系数的影响较小,相比之下对压力系数的影响更为明显。在较小的楔角角度和钝化半径时,气动参数最大值均出现在唇缘顶点之后的位置,切向上气动参数呈现出先上升后下降的趋势。随着楔角角度和钝化半径的增大,气动参数最大值出现的位置不断前移,直至唇缘顶点。除此之外,平板表面气动参数的最大值也随着楔角角度和钝化半径的增大不断升高。The aerothermodynamics and aerodynamics of the two-dimensional plates with a sharp leading edge were analyzed in hypersonic rarefied flow via DSMC method.The models with different wedge angle and bluntness radius were selected for calculation and analyses,aiming to reveal the influence rule and mechanism.The numerical results show that wedge angle and bluntness radius have the same influence on the flow field structure near the leading edge,which induces the influence rule of wedge angle and bluntness radius on aerothermodynamics and aerodynamics on the surface very similar.Wedge angle and bluntness radius have less effect on heat transfer coefficient and skin friction coefficient,while the pressure coefficient was more influenced by that.When the wedge angle and bluntness radius are relatively small,the maximum value of aerothermodynamics and aerodynamics parameters appears downstream from the lip edge.With the increase of wedge angle and bluntness radius,the position of the maximum value of the parameters moves forward continuously until the lip edge.In addition,the maximum value of aerothermodynamics and aerodynamics parameters also increases with that.

关 键 词：高超声速稀薄流 DSMC 尖前缘平板 气动特性 

分 类 号：F407.5[经济管理—产业经济]