EXCELLENT OPPORTUNITIES EXIST FOR REDUCING THE DRAG OF AIRCRAFT BY INCREASING THE EXTENT OF LAMINAR BOUNDARY-LAYER FLOW OVER THE CONFIGURATION.

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 1680
Amount: $48,866.00
Phase: Phase I
Program: SBIR
Awards Year: 1984
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
28 Research Drive, Hampton, VA, 23666
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 CORNELIS P. VAN DAM
 INVESTIGATOR
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
EXCELLENT OPPORTUNITIES EXIST FOR REDUCING THE DRAG OF AIRCRAFT BY INCREASING THE EXTENT OF LAMINAR BOUNDARY-LAYER FLOW OVER THE CONFIGURATION. RECENT TECHNOLOGICAL ADVANCES IN AIRPLANE CONSTRUCTION TECHNIQUES AND MATERIALS EMPLOYING BONDED AND MILLED ALUMINUM SKINS AND COMPOSITE MATERIALS ALLOW FOR THE PRODUCTION OF AERODYNAMIC SURFACES WITHOUT SIGNIFICANT ROUGHNESS AND WAVINESS, PERMITTING LONG RUNS OF NATURAL LAMINAR FLOW (NLF). ALSO, IMPROVED AERODYNAMIC DESIGN AND ANALYSIS METHODS FACILITATE THE SHAPING OF AIRPLANE SURFACES TO OBTAIN FLOW CONDITIONS FAVORABLE TO NLF. A MAJOR PORTION OF THE RESEARCH EFFORT FOR OBTAINING AND MAINTAINING LAMINAR FLOW ON AIRPLANE SURFACES HAS FOCUSED ON THE DELAY OF LAMINAR-TO-TURBULENT BOUNDARY-LAYER TRANSITION ON AIRPLANE LIFTING SURFACES. BODY SHAPING TO INCREASE THE EXTENT OF LAMINAR FLOW ON AIRPLANE FUSELAGES HAS RECEIVED MUCH LESS ATTENTION IN THE LITERATURE. A SIGNIFICANT REDUCTION IN AIRPLANE DRAG CAN BE OBTAINED, HOWEVER, WHEN NLF IS ACHIEVED ON THE FUSELAGE OF AN AIRPLANE. THE PHASE I OBJECTIVES ARE TO EVALUATE THE VARIOUS COMPUTATIONAL DESIGN AND ANALYSIS METHODS WHICH CAN BE APPLIED FOR THE DEVELOPMENT OF LOW-DRAG AERODYNAMIC FUSELAGE SHAPES AND TO ADDRESS THE ANALYTICAL DESIGN OF BODY SHAPES OF SEVERAL FUSELAGES AT FREE-STREAM UNIT REYNOLDS NUMBERS OF 1.5-3.0 MILLION PER FOOT. THE MOST PROMISING CONFIGURATION(S) WILL BE WIND-TUNNEL AND/OR FLIGHT TESTED DURING PHASE II.

* 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
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government