Accession Number : AD0726546

Title :   Viscous Flow Along a Corner. Part III. Effects of Axial Pressure Gradient,

Corporate Author : POLYTECHNIC INST OF BROOKLYN FARMINGDALE N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Grossman,Bernard ; Rubin,Stanley G.

Report Date : FEB 1971

Pagination or Media Count : 70

Abstract : The laminar, incompressible flow along a corner formed by the intersection of two thin airfoils is considered. The effects of small axial pressure gradients on the flow in the vicinity of the corner are determined as a perturbation to the flow along a corner formed by intersecting flat plates. The method of matched asymptotic expansions is used to determine the cross-flow induced second-order boundary-layer flow away from the corner, and these results serve as the asymptotic boundary conditions for the corner-layer analysis. The effects of both favorable and adverse pressure gradients on the cross flow are discussed. The corner-layer equations are solved numerically with a relaxation procedure. The results for the corners formed by intersecting thin wedges and intersecting Joukowski airfoils indicate that there are substantial interference effects even for very thin airfoil shapes, i.e., small axial pressure gradients. (Author)

Descriptors :   (*AERODYNAMIC CONFIGURATIONS, INTERACTIONS), (*FLOW FIELDS, AIRFOILS), (*BOUNDARY LAYER, GEOMETRIC FORMS), VISCOSITY, FLAT PLATE MODELS, WEDGES, PRESSURE, FLOW FIELDS, LAMINAR FLOW, INCOMPRESSIBLE FLOW, MATHEMATICAL ANALYSIS, NAVIER STOKES EQUATIONS

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE