高超声速可压缩流中粗糙壁热流研究

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.

Study of Rough Wall Heat Flux in Hypersonic Turbulent Flow

Heat transfer distribution is analyzed on a rough wall in high speed turbulent compressible flow via computational fluid dynamics(CFD) method and analytical correlations, focusing on heat transfer with different roughness number and roughness element shape. It shows that, in all cases, heat flux augmentation predicted with CFD increases with reduction of roughness element density and levels off after roughness shape density is small, which differs with data of three analytical correlations. Predicted heat fluxes are same if same roughness element density and equivalent height are imposed on analytical correlations distinguishing from tendency of CFD results, which changes with roughness element shapes.