A NOVEL POTENTIAL/VISCOUS FLOW COUPLING TECHNIQUE FOR COMPUTING HELICOPTER FLOW FIELDS

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$1,492,497.00
Award Year:
1990
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
10396
Agency Tracking Number:
10396
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2133-152nd Ave Ne, Redmond, WA, 98052
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr J Michael Summa
() -
Business Contact:
() -
Research Institute:
n/a
Abstract
BECAUSE OF THE COMPLEXITY OF THE HELICOPTER FLOW FIELD, A ZONAL METHOD OF ANALYSIS OF COMPUTATIONAL AERODYNAMICS IS REQUIRED. IN THIS RESEARCH, A NEW PROCEDURE FOR COUPLING POTENTIAL AND VISCOUS FLOW CALCULATION SCHEMES IS PROPOSED. AN OVER-LAPPING, VELOCITY-COUPLING TECHNIQUE IS TO BE DEVELOPED WITH THE UNIQUE FEATURE THAT THE POTENTIAL FLOW SURFACE SINGULARITY STRENGTHS ARE OBTAINED DIRECTLY FROM THE NAVIER-STOKES SOLUTION AT A SMOOTHER INNER FLUID BOUNDARY. THE CLOSED-LOOP INTERATION METHOD PROCEEDS UNTIL THE VELOCITY FIELD IS CONVERGED. THIS COUPLING SHOULD PROVIDE THE MEANS OF MORE ACCURATE VISCOUS COMPUTATIONS OF THE NEAR-BODY AND ROTOR FLOW FIELDS WITH RESULTANT IMPROVED ANALYSIS OF SUCH IMPORTANT PERFORMANCE PARAMETERS AS HELICOPTER FUSELAGE DRAG AND ROTOR AIRLOADS.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government