Record Details

On wake response to asymmetric blowing in spurts from a blunt trailing edge

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title On wake response to asymmetric blowing in spurts from a blunt trailing edge
 
Creator SHARMA, SD
PANT, RR
 
Subject momentumless wake
coherent structures
unsteady momentum injection
control of periodic wake
vortex-shedding suppression
drag reduction
 
Description In the present investigation, a technique has experimentally been evolved with the aim to control the unsteady wake dominated by periodic vortex-shedding. The technique uses pulsating surface blowing that is applied asymmetrically just before separation from the blunt trailing edge of a thick aerofoil model. Thus, momentum is injected in spurts in only one of the two separated shear layers. The control parameters are the mass flow rate and the forcing frequency of the pulsating blowing. The technique is particularly effective in suppressing the vortex-shedding when the blowing is moderate and the forcing frequency is twice the natural vortex-shedding frequency. As a consequence of injecting momentum in spurts, there is a significant saving in mass flow required to achieve a condition of the momentumless wake. In spite of the initial conditions being strongly asymmetric, the flow pattern in the wake was observed to quickly assume a remarkable symmetry.
 
Publisher SPRINGER
 
Date 2011-10-22T04:53:50Z
2011-12-15T09:10:43Z
2011-10-22T04:53:50Z
2011-12-15T09:10:43Z
2007
 
Type Article; Proceedings Paper
 
Identifier SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES,32,111-122
0256-2499
http://dx.doi.org/10.1007/s12046-007-0010-1
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14824
http://hdl.handle.net/100/1615
 
Source Conference on Flow Control and Diagnostics,Orange Cty, CA,FEB 19-22, 2006
 
Language English