Accession Number : ADP000247

Title :   Shock Induced Unsteady Flat Plate Boundary Layers and Transitions,

Corporate Author : KYOTO UNIV (JAPAN) DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Matsushita,M. ; Akamatsu,T. ; Fujimura,K.

Report Date : JUL 1981

Pagination or Media Count : 9

Abstract : For the shock-induced unsteady boundary layers over a flat plate installed in a shock tube, the effect of velocity profile, not of surface cooling and compressibility, on the transition into turbulence is estimated by using Wazzan's relation. The locus of the points of instability are drawn on the x-t diagram, where the lowering of instability points is found in the unsteady interaction region. The limiting case that the shock waves become weak correspond to that which the incompressible fluid starts to move impulsively. This flow is achieved in an intermittent liquid tunnel. And the transition of unsteady flat plate boundary layer is observed to take place earlier than the time predicted from the linearized theory.

Descriptors :   *Flat plate models, *Boundary layer transition, *Shock tubes, *Shock waves, Mathematical models, Japan

Distribution Statement : APPROVED FOR PUBLIC RELEASE