Accession Number:

ADA291128

Title:

Cross Flow Instability of Supersonic Flow over a 4:1 Elliptic Cone.

Descriptive Note:

Final rept. 1 Jun 94-31 Jan 95,

Corporate Author:

DYNAFLOW INC COLUMBUS OH

Report Date:

1995-01-20

Pagination or Media Count:

51.0

Abstract:

The cross flow-initiated transition process over the surface of a supersonic 41 elliptic cone with 17.5 degree half-angle has been investigated using state-of-the-art local and PSE stability analyses. The basic flow was computed using the AFWAL PNS code. The local stability analysis was performed in order to find the regions and parameter ranges in which the cross flow vortex is unstable. The PSE analyses were then carried out in order to study the nonparallel effects of the flow on the most dangerous vortices--those with the greatest growth. The PSE analyses predict much greater amplification of the cross flow vortices and transition near the apex of the cone compared to the local analysis. AN

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE