Roughness-Induced Laminar-Turbulent Transition in the Boundary Layer of a Capsule-Like Geometry at Mach 20 Including Non-equilibrium

被引：0

作者：

Di Giovanni, Antonio ^{[1
]}

Stemmer, Christian ^{[1
]}

机构：

[1] Tech Univ Munich, Chair Aerodynam & Fluid Mech, Boltzmannstr 15, D-85748 Garching, Germany

来源：

IUTAM LAMINAR-TURBULENT TRANSITION | 2022年 / 38卷

关键词：

DISTRIBUTED ROUGHNESS; FLOW; OBSTACLE;

D O I：

10.1007/978-3-030-67902-6_46

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Direct Numerical Simulations are performed to investigate the instability mechanisms in a capsule-like configuration with a rough wall under typical re-entry conditions. The growth of unstable crossflow-type modes induced by a patch of randomly distributed roughness is analyzed in both the linear and non-linear stages up to laminar-turbulent breakdown. At the considered conditions, molecular dissociation and non-equilibrium effects significantly change the temperature profiles of the capsule boundary layer and have a non-negligible effect on the stability properties of the roughness wake.

引用

页码：531 / 539

页数：9

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