高超声速可压缩流中粗糙壁热流研究
发布时间：2019-08-03 18:04
【摘要】：用计算流体力学(CFD)数值模拟和理论方法对高超声速可压缩湍流中粗糙壁面热增量进行研究.着重考虑粗糙单元密度和粗糙单元形状对粗糙表面热流的影响.结果表明:1粗糙单元密度变化时,CFD数值方法计算所得的粗糙单元等效热流随着粗糙单元密度的降低而增加,理论方法预测结果的规律随方法不同而不同;2在相同粗糙单元密度和高度时,如果粗糙单元形状改变,CFD计算结果也随之发生改变.理论预测方法所得结果不发生变化.
[Abstract]:The thermal increment of rough wall in hypersonic compressible turbulence is studied by computational fluid dynamics (CFD) numerical simulation and theoretical method. The effects of rough element density and rough element shape on heat flow on rough surface are considered. The results show that: (1) when the density of rough element changes, the equivalent heat flow of rough element calculated by CFD numerical method increases with the decrease of rough element density, and the prediction results of theoretical method vary with different methods. (2) when the density and height of rough element change, the CFD calculation results also change if the shape of rough element changes. The results obtained by the theoretical prediction method do not change.
【作者单位】： 中国航天空气动力技术研究院;
【分类号】：O354.4
，
本文编号：2522702
[Abstract]:The thermal increment of rough wall in hypersonic compressible turbulence is studied by computational fluid dynamics (CFD) numerical simulation and theoretical method. The effects of rough element density and rough element shape on heat flow on rough surface are considered. The results show that: (1) when the density of rough element changes, the equivalent heat flow of rough element calculated by CFD numerical method increases with the decrease of rough element density, and the prediction results of theoretical method vary with different methods. (2) when the density and height of rough element change, the CFD calculation results also change if the shape of rough element changes. The results obtained by the theoretical prediction method do not change.
【作者单位】： 中国航天空气动力技术研究院;
【分类号】：O354.4
，
本文编号：2522702
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