On harmonic perturbations in a turbulent mixing layer

Yuli Lifshitz, David Degani, Anatoli Tumin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

The problem of coherent perturbations in a turbulent mixing layer is revisited. The governing equations for perturbations are derived from the RANS equations with a Boussinesq-type closure model. The proposed theoretical model utilizes the idea of separating the "fast" and the "slow" scales in a manner similar to the PSE concept. However, the equations for the amplitude functions are not simplified (not parabolized). Emulation of an actuator (oscillating flap) is introduced into the computational analysis via inhomogeneous boundary conditions. The actuator size and amplitude, the effect of coherent perturbation on the base flow, and the non-linear effects in the development of the coherent signal are investigated.

Original languageEnglish (US)
Title of host publication34th AIAA Fluid Dynamics Conference and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624100314
DOIs
StatePublished - 2004
Event34th AIAA Fluid Dynamics Conference and Exhibit 2004 - Portland, OR, United States
Duration: Jun 28 2004Jul 1 2004

Publication series

Name34th AIAA Fluid Dynamics Conference and Exhibit

Other

Other34th AIAA Fluid Dynamics Conference and Exhibit 2004
CountryUnited States
CityPortland, OR
Period6/28/047/1/04

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Aerospace Engineering

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