Accession Number : ADA084768


Title :   Experimental Investigation of Three-Dimensional Shock Wave Turbulent Boundary Layer Interaction: An Exploratory Study of Blunt Fin-Induced Flows.


Descriptive Note : Final rept. Jun 76-Dec 79,


Corporate Author : PRINCETON UNIV NJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING


Personal Author(s) : Dolling,David S ; Bogdonoff,Seymour M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a084768.pdf


Report Date : Mar 1980


Pagination or Media Count : 75


Abstract : An experimental study of three-dimensional (3-D) shock wave turbulent boundary layer interaction has been carried out. Interactions generated by fin models having sharp and hemi-cylindrically blunted leading edges have been studied. The emphasis in this particular study was twofold. First, the influence of incoming turbulent boundary layer thickness delta on the streamwise, spanwise and vertical scaling of the interaction was examined. Turbulent boundary layers varying in thickness from .127 cm (.05 in.) to 2.27 cm (0.89 in.) were used. In addition, a study has been conducted to examine the effects of the ratio D/delta (where D is the blunt fin leading edge diameter) on the interaction properties and scaling. Second, an investigation has been started to examine the unsteady shock wave-boundary layer structure and the resulting high frequency, large amplitude pressure fluctuations which occur ahead of and around the blunt fin leading edge. This is an area which in the past has been largely ignored, yet has important implications, since it is not clear that any mean surface property or flowfield measurements have any real physical significant. To date, measurement techniques and computer software have been developed and exploratory measurements made in the undisturbed turbulent boundary layer and also on the plane of symmetry ahead of the blunt fin.


Descriptors :   *SHOCK WAVES , *TURBULENT BOUNDARY LAYER , *LEADING EDGES , COMPUTER PROGRAMS , EXPERIMENTAL DATA , INTERACTIONS , THREE DIMENSIONAL , BLUNT BODIES , FINS


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE