ADVANCED COMPUTATIONAL TECHNIQUES IN STUDIES OF HYPERSONIC BOUNDARY-LAYER TRANSITION

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$49,994.00
Award Year:
1990
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
12554
Agency Tracking Number:
12554
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
28 Research Dr, Hampton, VA, 23666
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Mujeeb R Malik
(804) 865-0818
Business Contact:
() -
Research Institute:
n/a
Abstract
THE OBJECTIVE OF THE PROPOSED WORK IS TO USE ADVANCED THEORETICAL AND COMPUTATIONAL TECHNIQUES FOR STUDIES OF HYPERSONIC BOUNDARY LAYER STABILITY AND TRANSITION TO TURBULENCE. THESE STUDIES WILL ENHANCE OUR UNDERSTANDING OF THE TRANSITION PHENOMENA AND THUS HELP PREDICT AND CONTROL TRANSITION WITH A HIGH DEGREE OF CONFIDENCE. TO ACHIEVE OUR GOAL, WE USE LINEAR STABILITY THEORY, SECONDARY INSTABILITY AND WEAKLY NONLINEAR THEORIES AND FULL NUMERICAL SIMULATIONS INVOLVING STATE-OF-THE-ART COMPUTATIONAL TECHNIQUES (MULTI-DOMAIN SPECTRAL COLLOCATION METHODS, HIGHER-ORDER FINITEDIFFERENCE METHODS). OF PARTICULAR INTEREST TO US IS THE INVESTIGATION OF THE EFFECT OF ADVERSE PRESSURE GRADIENT AND THE QUESTION OF NONLINEAR BREAKDOWN. A LONG-TERM GOAL IS TO COUPLE THE LINEAR AND NONLINEAR STAGES WITH RECEPTIVITY PHENOMENON IN ORDER TO DEVELOP A TRULY PREDICTIVE TECHNIQUE WHICH IS NEEDED FOR THE DESIGN OF HYPERSONIC VEHICLES.

* information listed above is at the time of submission.

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