NUMERICAL AND ANALYTIAL STUDIES OF LAMINAR TO TURBULENCE TRANSITION

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$179,309.00
Award Year:
1990
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
9778
Agency Tracking Number:
9778
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:
Dr Mujeeb R Malik
(804) 865-0818
Business Contact:
() -
Research Institute:
n/a
Abstract
IT IS PROPOSED HERE TO STUDY NONLINEAR DEVELOPMENT OF GORTLER AND CROSSFLOW VORTICES AND INVESTIGATE VARIOUS WAVE-INTERACTION MECHANISMS OPERATIVE IN TWO AND THREE-DIMENSIONAL BOUNDARY LAYERS. THE PROPOSED WORK WILL NUMERICALLY SIMULATE TRANSITION IN A THREEDIMENSIONAL BOUNDARY LAYER. THE OBJECTIVE OF THE RESEARCH IS TO FURTHER THE UNDERSTANDING OF LAMINAR/TURBULENT TRANSITION MECHANISMS AND GORTLER/TS AND CROSSFLOW/TS INTERACTION. WE WILL INVESTIGATE NUMERICALLY AND THEORETICALLY WHAT IMPACT THESE WAVE-INTERACTIONS MIGHT HAVE ON PRESENT DAY TRANSITION PREDICTION METHODOLOGY BASED UPON LINEAR STABILITY THEORY AND WILL SUGGEST IMPROVEMENTS IN THE PREDICTION TECHNIQUES. TRANSITION PREDICTION IS OF IMMENSE PRACTICAL SIGNIFICANCE AND UNDERSTANDING OF THE TRANSITION PROCESS IS ALSO OF RELEVANCE IN FURTHERING THE KNOWLEDGE OF TURBULENCE. TO ACHIEVE OUR GOAL, WE USE STATE OF THE ART SPECTRAL TECHNIQUES FOR NUMERICAL SIMULATION AND EVALUATE THEORIES BASED UPON TRIPLE-DECK APPROACH, METHOD OF MULTIPLE-SCALES AND FLOQUET ANALYSIS.

* information listed above is at the time of submission.

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