Kumar, R and Viswanath, PR (2002) Passive control of surface pressure fluctuations in reattaching flows. Aeronautical Journal, 106 (1066). pp. 669-674.Full text not available from this repository.
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|
Actions (login required)