The unsteady flow physics of hypersonic inlet starting processes

A. L. Grainger, R. R. Boyce, S. C. Tirtey, H. Ogawa, G. Paniagua, S. Paris

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

5 Citations (Scopus)

Abstract

A 2D numerical investigation was undertaken utilising transient, time-accurate, RANS computational fluid dynamics, with the aim of investigating the influence of viscous and unsteady effects when attempting to start a hypersonic scramjet inlet. A variable geometry inlet starting mechanism incorporating sliding doors was utilised, with the two doors initially extending upstream from the scramjet leading edge. After establishing a steady-state solution, the doors were retracted up and over the inlet and the resulting flow field captured. A started flow regime was achieved only when retracting the doors at such a speed (0.1ms total retraction time) that at no point could quasi-steady Kantrowitz assumptions be applied to the internal flow field. Viscous effects were seen to play a significant role in the inlet starting process, with unstart being obtained earlier for lower Reynolds number conditions. Shockwave boundary layer interactions (SWBLI) were found to be the key driver behind inlet unstart.

Original languageEnglish
Title of host publication18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012
Publication statusPublished - 2012
Event18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012 - Tours, France
Duration: Sep 24 2012Sep 28 2012

Publication series

Name18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012

Conference

Conference18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012
CountryFrance
CityTours
Period9/24/129/28/12

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering
  • Control and Systems Engineering

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  • Cite this

    Grainger, A. L., Boyce, R. R., Tirtey, S. C., Ogawa, H., Paniagua, G., & Paris, S. (2012). The unsteady flow physics of hypersonic inlet starting processes. In 18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012 (18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012).