Accession Number:

ADA413149

Title:

DNS Studies of Transitional Hypersonic Reacting Flows Over 3-D Hypersonic Vehicles

Descriptive Note:

Final rept. 15 Dec 1999-30 Nov 2002

Corporate Author:

CALIFORNIA UNIV LOS ANGELES DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

2003-03-05

Pagination or Media Count:

54.0

Abstract:

The objectives of this research project are to develop CFD techniques and to conduct DNS studies of fundamental flow physics leading to boundary-layer instability and transition in hypersonic flows During the three-year period, we have conducted extensive DNS studies on the receptivity of a supersonic boundary layer over a blunt cone, and over both sharp and blunt leading edge and on the receptivity of the Goertler vortices. DNS studies were also compared with Stetsons 1984 stability experiment on Mach 7.99 flow over a blunt cone. Our studies have led to new understanding of a number of hypersonic boundary layer receptivity mechanisms. Such understanding can lead to better tool for the prediction and control of high-speed boundary layer transition.

Subject Categories:

  • Aerodynamics
  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE