DYNAMIC STALL CONTROL

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 12422
Amount: $399,785.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
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
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr Patrick J Roache
 (505) 843-7445
Business Contact
Phone: () -
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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