Passive control of surface pressure fluctuations in reattaching flows

Kumar, R and Viswanath, PR (2002) Passive control of surface pressure fluctuations in reattaching flows. Aeronautical Journal, 106 (1066). pp. 669-674.

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Abstract

Experiments assessing the effectiveness of passive control involving a porous surface and cavity underneath for reducing the level of surface pressure fluctuations in reattaching flows are reported. Measurements are made on a generic axisymmetric body, representative of a launch vehicle configuration, in the Mach number range of 0.8 to 1.2. The measurements consist of distributions of mean surface pressure and unsteady surface pressure fluctuations in the boat-tail separated region. The passive control significantly reduces the peak surface pressure fluctuations in the reattachment zone, even in the absence of a strong shock wave. The spectra of pressure fluctuations reveal that with passive control the energy is appreciably reduced over a wide range of frequencies.

Item Type: Journal Article
Uncontrolled Keywords: Boundary layers; Drag; Flow control; Flow visualization; Pressure control; Reynolds number; Shock waves; Spacecraft; Transonic aerodynamics; Wind tunnels; Launch vehicle; Mach number; Passive control; Porous surface; Surface pressure fluctuations; Aerospace engineering;
Subjects: AERONAUTICS > Aerodynamics
Division/Department: Other, Experimental Aerodynamics Division
Depositing User: MS Jayashree S
Date Deposited: 07 Jan 2005
Last Modified: 24 May 2010 09:38
URI: http://nal-ir.nal.res.in/id/eprint/68

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