A model of coherent disturbances in compressible mixing layers

Hong Yang, Anatoli Tumin

Research output: Contribution to conferencePaperpeer-review

Abstract

A theoretical model of harmonic perturbations in a compressible turbulent mixing layer is proposed. The model is based on the triple decomposition method. It is assumed that the instantaneous velocities, temperature, and pressure consist of three distinctive components: mean (time-averaged), coherent (phase-averaged), and random (turbulent) motion. The interaction between incoherent turbulent fluctuations and large-scale coherent disturbances is incorporated by the Newtonian eddy viscosity model. The governing equations for the coherent disturbances have the same form as in laminar flow with substitution of the Reynolds number and the Prandtl number by their turbulent counterparts. A slight divergence of the flow is also taken into account. Theoretical results and comparison with experimental data reveal the significance of interaction between the coherent and random constituents of the flow.

Original languageEnglish (US)
Pages1437-1442
Number of pages6
DOIs
StatePublished - Dec 11 2002
EventProceedings of the 2002 ASME Joint U.S.-European Fluids Engineering Conference - Montreal, Que., United States
Duration: Jul 14 2002Jul 18 2002

Other

OtherProceedings of the 2002 ASME Joint U.S.-European Fluids Engineering Conference
Country/TerritoryUnited States
CityMontreal, Que.
Period7/14/027/18/02

ASJC Scopus subject areas

  • Engineering(all)

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