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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

DIRECT NUMERICAL SIMULATION OF TURBULENT FLOW IN AN AXISYMMETRIC SUPERSONIC DIFFUSER

pages 1357-1362
DOI: 10.1615/TSFP6.2160
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Краткое описание

Effects of deceleration and mean dilatation on the turbulence structure of supersonic flow in a diffuser with an incoming supersonic fully-developed turbulent pipe flow are studied by means of DNS. Strong enhancement of the turbulence intensities is observed when the flow undergoes deceleration. Turbulence production and pressure-strain terms in the Reynolds stress budgets are found to increase dramatically leading to increased Reynolds stresses. The central role of pressure-strain correlations in modifying the turbulence structure in these flow conditions is demonstrated.

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