ROTARY WING HOVER PERFORMANCE PREDICTION

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$451,948.00
Award Year:
1984
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
596
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Continuum Dynamics Inc.
P.o. Box 3073, Princeton, NJ, 08540
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Donald B. Bliss
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THE ACCURATE PREDICTION OF THE PERFORMANCE OF A HELICOPTER ROTOR IN HOVER IS CRITICAL TO THE SUCCESS OF THE DESIGN. A NOVEL APPROACH TO THE SOLUTION OF THE HELICOPTER FREE WAKE HOVER PROBLEM IS ADDRESSED BY FINDING THE SELF-PRESERVING WAKE SHAPE WHICH IS STEADY IN BLADE-FIXED COORDINATES. THE SOLUTION CAN BE USED TO PREDICT THE AVERAGE PERFORMANCE OF ROTOR IN HOVER. THE SOLUTION OBTAINED BY AN INFLUENCE COEFFICIENT METHOD, PROMISES TO BE VERY EFFICIENT AND AVOIDSTHE USE OF A TIME EVOLUTION APPROACH AND THE ASSOCIATED PROBLEMS WITH WAKE INSTABILITY. THE SOLUTION PROCEDURE UTILIZES THE NEW CURVED VORTEX ELEMENT TECHNOLOGY DEVELOPED RECENTLY. THE WORK PROVIDES IMPROVED UNDERSTANDING OF THE FUNDAMENTAL FLUID MECHANICS OF ROTOR WAKES, WHILE OFFERING THE POSSIBILITY OF IMPROVED PREDICTIVE CAPABILITY FOR HOVERING ROTORS.

* information listed above is at the time of submission.

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