Study of Rough Wall Heat Flux in Hypersonic Turbulent Flow

Abstract

Abstract: 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.

Key words: rough height, turbulent flow, analytical correlation, numerical simulation, heat flux augmentation

CLC Number:

O362

LI Junhong, ZHANG Liang, YU Jijun, CHENG Xiaoli. Study of Rough Wall Heat Flux in Hypersonic Turbulent Flow[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2017, 34(2): 165-174.

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