DYNAMIC STALL CONTROL

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$399,785.00
Award Year:
1992
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
12422
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Ecodynamics Research Associate
Po Box 8172, Albuquerque, NM, 87198
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Patrick J Roache
(505) 843-7445
Business Contact:
() -
Research Institution:
n/a
Abstract
COMPUTATIONAL ALGORITHMS AND CODE WILL BE DEVELOPED FOR CALCULATING UNSTEADY COMPRESIBLE 3-D VISCOUS FLOW AND RETREATING-BLADE DYNAMIC STALL ON MODERN HIGH-PERFORMANCE HELIOPTER ROTORS. THE ALGORITHM DEVELOPMENT WILL START FROM AN EXISTING 3-D TIME DEPENDENT VISCOUS COMPRESSIBLE CODE ALREADY USED SUCCESSFULLY TO CALCULATE PERIODIC PITCHING OF A SWEPT WING SECTION MOUNTED IN A WIND TUNNEL TEST SECTION. THE CODE USES AN APPROXIMATE FACTORIZATION (AF) ALGORITHM (INCLUDING CROSS DERIVATIVE TERMS) IN A MOVING BOUNDARY FITTED CORDINATE SYSTEM WITH SOLUTION ADAPTIVE GRID GENERATION ALGORITHMS, AND IS HIGHLY VECTORIZED FOR THE CRAY-2. THE NEW CODE WILL INCLUDE THE MORE DIFFICULT GEOMETRY DESCRIPTION OF A FINITE SPAN WING, AND TURBULENCE MODELING FOR STRONGLY SEPARATED FLOWS INCLUDING CENTRIFUGAL FORCES. THE PHASE II CODE WILL ALSO BE APPLICABLE TO COMPLEX MOTIONS AND TO FULLY COUPLED AEROELASTICITY CALCULATIONS.

* information listed above is at the time of submission.

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