Effects of inflow shear layer parameters on a transitional supersonic jet with a moderate Reynolds number

Taku Nonomura, Kozo Fujii

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

4 Citations (Scopus)

Abstract

Flow and acoustic fields of a transitional supersonic free jet with the moderate Reynolds number are investigated. Compressible Navier-Stokes equations are solved by a high-order compact scheme, and the effects of inflow shear layer characteristics are investigated. The Mach and Reynolds numbers are set to 2.1 and 70,000, respectively. Five different jets with different shear layer thicknesses and a jet with disturbances are computed, and the effects of the shear layer thickness and the disturbance are discussed. With decreasing the shear layer thickness or adding the disturbance, the transition position and the turbulence growth rate after the transition are significantly affected, and the turbulent fluctuation along the shear layer and the resulting Mach waves become smaller. The potential core length becomes shortest when the shear layer thickness is set to medium of the range we investigated, which might be explained by the position of turbulence transition and the growth rate after transition that are much affected by the inflow shear layer thickness.

Original languageEnglish
Title of host publication19th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages224
Number of pages1
ISBN (Print)9781624102134
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event19th AIAA/CEAS Aeroacoustics Conference - Berlin, Germany
Duration: 2013 May 272013 May 29

Publication series

Name19th AIAA/CEAS Aeroacoustics Conference

Other

Other19th AIAA/CEAS Aeroacoustics Conference
CountryGermany
CityBerlin
Period13/5/2713/5/29

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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