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Computational Analysis of the G-III Laminar Flow GloveUnder NASA's Environmentally Responsible Aviation Project, flight experiments are planned with the primary objective of demonstrating the Discrete Roughness Elements (DRE) technology for passive laminar flow control at chord Reynolds numbers relevant to transport aircraft. In this paper, we present a preliminary computational assessment of the Gulfstream-III (G-III) aircraft wing-glove designed to attain natural laminar flow for the leading-edge sweep angle of 34.6deg. Analysis for a flight Mach number of 0.75 shows that it should be possible to achieve natural laminar flow for twice the transition Reynolds number ever achieved at this sweep angle. However, the wing-glove needs to be redesigned to effectively demonstrate passive laminar flow control using DREs. As a by-product of the computational assessment, effect of surface curvature on stationary crossflow disturbances is found to be strongly stabilizing for the current design, and it is suggested that convex surface curvature could be used as a control parameter for natural laminar flow design, provided transition occurs via stationary crossflow disturbances.
Document ID
20110013661
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Malik, Mujeeb R. (NASA Langley Research Center Hampton, VA, United States)
Liao, Wei (National Inst. of Aerospace Hampton, VA, United States)
Lee-Rausch, Elizabeth M. (NASA Langley Research Center Hampton, VA, United States)
Li, Fei (NASA Langley Research Center Hampton, VA, United States)
Choudhari, Meelan M. (NASA Langley Research Center Hampton, VA, United States)
Chang, Chau-Lyan (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
June 27, 2011
Subject Category
Aerodynamics
Report/Patent Number
AIAA Paper 2011-3525
NF1676L-11933
Meeting Information
Meeting: 29th AIAA Applied Aerodynamics Conference
Location: Honolulu, HI
Country: United States
Start Date: June 27, 2011
End Date: June 30, 2011
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 699959.02.08.07.14
Distribution Limits
Public
Copyright
Public Use Permitted.

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