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High Reynolds Number Configuration Development of a High-Lift AirfoilAn experimental program has been conducted to assess performance of a transport multielement airfoil at flight Reynolds numbers. The studies were performed at chord Reynolds numbers as high as 16 million in the NASA Langley Low Turbulence Pressure Tunnel. Sidewall boundary-layer control to enforce flow two dimensionality was provided via an endplate suction system. The basic airfoil was an 11.55 percent thick supercritical airfoil representative of the stall critical station of a new-generation transport aircraft wing. The multielement airfoil was configured as a three-element airfoil with slat and flap chord ratios of 14.48 percent and 30 percent respectively. Testing focused on the development of landing configurations with high maximum lift capability and the assessment of Reynolds and Mach number effects. Also assessed were high-lift performance effects due to devices such as drooped spoilers and trailing-edge wedges. The present experimental studies revealed significant effects on high-lift airfoil performance due to Reynolds and Mach number variations and favorable lift increments at approach angles of attack due to the use of drooped spoilers or trailing-edge wedges. However, no substantial improvements in maximum lift capability were identified. A recently developed high performance single-segment flap was also tested and results indicated considerable improvements in lift and drag performance over existing airfoils. Additionally, it was found that this new flap shape at its optimum rigging was less sensitive to Reynolds number variations than previous designs.
Document ID
19940013951
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Valarezo, Walter O.
(Douglas Aircraft Co., Inc. Long Beach, CA., United States)
Dominik, Chet J.
(Douglas Aircraft Co., Inc. Long Beach, CA., United States)
Mcghee, Robert J.
(NASA Langley Research Center Hampton, VA, United States)
Goodman, Wesley L.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: AGARD, High-Lift System Aerodynamics
Subject Category
Aerodynamics
Accession Number
94N18424
Distribution Limits
Public
Copyright
Other
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