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Surface pressure measurements in shock wave/boundary-layer interactions

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Abstract

An experimental research program establishing a database of the surface pressure in swept shock wave/boundary-layer interactions is described. An equilibrium turbulent boundary-layer on a flat plate is subjected to impingement by swept planar shock waves genterated by a sharp fin. Various fin angles at 4 different freestream Mach numbers produce a variety of interaction strengths from weak to very strong. For each of different interaction cases, the surface flow patterns are obtained by a kerosene-lampblack-adhesive transparent tape technique. Surface pressures within the interactions are also measured from several streamwise row of taps connected to a computer-controlled Scanivalve system. An extensive error analysis is carried out for the experiments yielding an uncertainty of about ±3%. From these measurements, high spatial resolution surface pressure distributions for different interaction cases are obtained.

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Abbreviations

M :

Mach number

p :

Surface static pressure

R :

Radial distance from fin leading-edge

VCO:

Virtual conical origin

α:

Angle-of-attack of the fin

β:

Angle with respect to incoming free-stream direction, measured from fin leading-edge

pa :

Primary attachment

peak :

Peak value

ps :

Primary separation

ss :

Secondary separation

ui :

Upstream influence

∞:

Incoming freestream

n :

Normal component

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Authors and Affiliations

  1. Department of Aeronautical & Mechanical Engineering, Hankuk Aviation University, Korea

    Yeol Lee

  2. High Technology Corporation, 23666, Hampton, VA, U.S.A.

    Sanjay Garg

  3. Department of Mechanical Engineering, Pennsylvania State University, 16802, University Park, PA, U.S.A.

    Gary S. Settles

Authors
  1. Yeol Lee
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  2. Sanjay Garg
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  3. Gary S. Settles
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Lee, Y., Garg, S. & Settles, G.S. Surface pressure measurements in shock wave/boundary-layer interactions. KSME International Journal 11, 164–172 (1997). https://doi.org/10.1007/BF02944890

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  • DOI: https://doi.org/10.1007/BF02944890

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