On harmonic perturbations in a turbulent mixing layer

Yuli Lifshitz; David Degani; Anatoli Tumin

doi:10.2514/6.2004-2653

On harmonic perturbations in a turbulent mixing layer

Yuli Lifshitz, David Degani, Anatoli Tumin

Aerospace and Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	34th AIAA Fluid Dynamics Conference and Exhibit
Publisher	American Institute of Aeronautics and Astronautics Inc.
ISBN (Print)	9781624100314
DOIs	https://doi.org/10.2514/6.2004-2653
State	Published - 2004
Event	34th AIAA Fluid Dynamics Conference and Exhibit 2004 - Portland, OR, United States Duration: Jun 28 2004 → Jul 1 2004

Publication series

Name	34th AIAA Fluid Dynamics Conference and Exhibit

Other

Other	34th AIAA Fluid Dynamics Conference and Exhibit 2004
Country	United States
City	Portland, OR
Period	6/28/04 → 7/1/04

ASJC Scopus subject areas

Engineering (miscellaneous)
Aerospace Engineering

Access to Document

10.2514/6.2004-2653

Fingerprint Dive into the research topics of 'On harmonic perturbations in a turbulent mixing layer'. Together they form a unique fingerprint.

Cite this

Lifshitz, Y, Degani, D & Tumin, A 2004, On harmonic perturbations in a turbulent mixing layer. in 34th AIAA Fluid Dynamics Conference and Exhibit. 34th AIAA Fluid Dynamics Conference and Exhibit, American Institute of Aeronautics and Astronautics Inc., 34th AIAA Fluid Dynamics Conference and Exhibit 2004, Portland, OR, United States, 6/28/04. https://doi.org/10.2514/6.2004-2653

@inproceedings{fa3dd872dbda4f9f95f0d14ee6713d16,

title = "On harmonic perturbations in a turbulent mixing layer",

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.",

author = "Yuli Lifshitz and David Degani and Anatoli Tumin",

year = "2004",

doi = "10.2514/6.2004-2653",

language = "English (US)",

isbn = "9781624100314",

series = "34th AIAA Fluid Dynamics Conference and Exhibit",

publisher = "American Institute of Aeronautics and Astronautics Inc.",

booktitle = "34th AIAA Fluid Dynamics Conference and Exhibit",

note = "34th AIAA Fluid Dynamics Conference and Exhibit 2004 ; Conference date: 28-06-2004 Through 01-07-2004",

}

TY - GEN

T1 - On harmonic perturbations in a turbulent mixing layer

AU - Lifshitz, Yuli

AU - Degani, David

AU - Tumin, Anatoli

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85087606099&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85087606099&partnerID=8YFLogxK

U2 - 10.2514/6.2004-2653

DO - 10.2514/6.2004-2653

M3 - Conference contribution

AN - SCOPUS:85087606099

SN - 9781624100314

T3 - 34th AIAA Fluid Dynamics Conference and Exhibit

BT - 34th AIAA Fluid Dynamics Conference and Exhibit

PB - American Institute of Aeronautics and Astronautics Inc.

T2 - 34th AIAA Fluid Dynamics Conference and Exhibit 2004

Y2 - 28 June 2004 through 1 July 2004

ER -