Supersonic inlet duct unstart induced by fuel jet injection

Hyungrok Do, Seong Kyun Im, M. Godfrey Mungal, Mark A. Cappelli

Research output: Contribution to conferencePaper

Abstract

A high pressure transverse air jet is injected into a Mach 5 supersonic model inlet to induce inlet unstart. Planar laser Rayleigh scattering from condensed CO2 particles is used to visualize flow dynamics during the unstart process, while in some cases, wall pressure traces are simultaneously recorded. Boundary layer separation triggered by downstream surface pressure rise is found to precede the formation of a shock system, instantly followed by inlet unstart. Studies conducted over a range of initial inlet flow conditions reveal that the presence of turbulent wall boundary layers affects the unstart dynamics. It is found that relatively thick turbulent boundary layers facilitate faster inlet unstart, when compared to thin, laminar boundary layers.

Original languageEnglish
Publication statusPublished - 2011 Jan 1
Externally publishedYes
Event7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada
Duration: 2011 Jul 282011 Jul 31

Conference

Conference7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
CountryCanada
CityOttawa
Period11/7/2811/7/31

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Do, H., Im, S. K., Mungal, M. G., & Cappelli, M. A. (2011). Supersonic inlet duct unstart induced by fuel jet injection. Paper presented at 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011, Ottawa, Canada.