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An analytic study of nonsteady two-phase laminar boundary layer around an airfoilRecently, NASA, FAA, and other organizations have focused their attention upon the possible effects of rain on airfoil performance. Rhode carried out early experiments and concluded that the rain impacting the aircraft increased the drag. Bergrum made numerical calculation for the rain effects on airfoils. Luers and Haines did an analytic investigation and found that heavy rain induces severe aerodynamic penalties including both a momentum penalty due to the impact of the rain and a drag and lift penalty due to rain roughening of the airfoil and fuselage. More recently, Hansman and Barsotti performed experiments and declared that performance degradation of an airfoil in heavy rain is due to the effective roughening of the surface by the water layer. Hansman and Craig did further experimental research at low Reynolds number. E. Dunham made a critical review for the potential influence of rain on airfoil performance. Dunham et al. carried out experiments for the transport type airfoil and concluded that there is a reduction of maximum lift capability with increase in drag. There is a scarcity of published literature in analytic research of two-phase boundary layer around an airfoil. Analytic research is being improved. The following assumptions are made: the fluid flow is non-steady, viscous, and incompressible; the airfoil is represented by a two-dimensional flat plate; and there is only a laminar boundary layer throughout the flow region. The boundary layer approximation is solved and discussed.
Document ID
19900015735
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hsu, Yu-Kao
(Maine Univ. Orono, ME, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1989
Publication Information
Publication: Old Dominion Univ., NASA/American Society for Engineering Educ
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
90N25051
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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