SUPERCRITICAL (SC) LOW DRAG LFC AIRFOILS WITH HIGH DESIGN MACH NUMBERS OFFERING AN INCREASED OPERATING RANGE, WIDER HIGH SPEED BUFFET MARGINS (PREFERABLY WITHOUT BOUNDARY LAYER SUCTION IN THE REGION OF THE SPANWISE BENDING MATERIAL FOR COMPOSITE WINGS)

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$33,694.00
Award Year:
1984
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
1682
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Escon Engineer & Sci Consults
100 Henry Lee Lane, Grafton, VA, 23692
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
WERNER PFENNINGER
INVESTIGATOR
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
SUPERCRITICAL (SC) LOW DRAG LFC AIRFOILS WITH HIGH DESIGN MACH NUMBERS OFFERING AN INCREASED OPERATING RANGE, WIDER HIGH SPEED BUFFET MARGINS (PREFERABLY WITHOUT BOUNDARY LAYER SUCTION IN THE REGION OF THE SPANWISE BENDING MATERIAL FOR COMPOSITE WINGS) AND SMALLER LIFT LOSS WITH TURBULENCE AT INTERMEDIATE MACH NUMBERS WILL BE DEVELOPED. INCREASED CLMAX NLF AND "HYBRID" TYPE SC LAMINAR FLOW AIRFOILS WILL ALSO BE DEVELOPED WHICH WILL INCLUDE: NATURAL LAMINAR FLOW WITH ACCELERATED FLOW OVER 50 TO 70% CHORD WITHOUT BOUNDARY LAYER SUCTION; LIMITED LOW DRAG SUCTION IN FRONT OF UPPER SURFACE WITH A FRONT NEGATIVE PRESSURE PEAK CLOSE TO LEADING EDGE FOLLOWED BY AN EXTENSIVE FLAT SUPERSONIC PRESSURE DISTRIBUTION TO ABOUT (2/3) CHORD; AND AN ADDITIONAL LOW DRAG SUCTION THROUGH REAR PRESSURE RISE ZONE. FURTHERMORE, THE INVESTIGATIONS WILL CONTINUE INTO DEVELOPMENT OF LFC AND NLF WINGS LAID OUT FOR SOMEWHAT LOWER FLIGHT SPEEDS WITHOUT EXTENSIVE SUPERSONIC ZONES.

* information listed above is at the time of submission.

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