Micro-ramp flow control of normal shock/boundary layer interactions

Thomas Herges, Erik Kroeker, Greg Elliott, Craig Dutton

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

Abstract

Boundary layer bleed has conventionally been used to control separation due to shock wave / boundary layer interactions (SBLIs) within supersonic engine inlets. However, bleed systems result in a loss of captured mass flow, incurring higher drag and ultimately lower propulsion system efficiency. Micro-ramp sub-boundary layer vortex generators (SBVGs) arranged in a spanwise array have been proposed in the past as a form of flow control methodology for shock wave/boundary layer interactions. Experiments have been conducted at Mach 1.4 to characterize flow details of such devices and obtain quantitative measurements of their ability to control the interaction of a normal shock and a turbulent boundary layer. The flow field was analyzed using Schlieren photography, surface oil flow visualization, and particle image velocimetry. An array of three micro-ramps, whose height was scaled to 40% of the incoming boundary layer thickness, was placed ahead of the shock interaction. It was demonstrated that the micro-ramps did entrain higher momentum fluid into the boundary layer which could improve boundary layer health. Specifically, the incompressible displacement thickness, momentum thickness and shape factor were decreased, and the skin friction coefficient was increased, for the SBLI with the micro-ramp array relative to the no-array case.

Original languageEnglish (US)
Title of host publication47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
StatePublished - Dec 1 2009
Event47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
Duration: Jan 5 2009Jan 8 2009

Publication series

Name47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition

Other

Other47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Country/TerritoryUnited States
CityOrlando, FL
Period1/5/091/8/09

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Fingerprint

Dive into the research topics of 'Micro-ramp flow control of normal shock/boundary layer interactions'. Together they form a unique fingerprint.

Cite this