Accession Number : AD0760349

Title :   Equivalence Rule and Transonic Flows Involving Lift,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Cheng,H. K. ; Hafez,Mohamed M.

Report Date : APR 1973

Pagination or Media Count : 34

Abstract : The transonic flow around a thin and smooth configuration with swept leading edge is shown to possess an outer nonlinear structure determined principally by an equivalent line source and an equivalent line doublet. In the lift dominated and intermediate domains there is an important nonlinear lift contribution to the equivalent source, which depends on both the axial and the spanwise lift distributions. This lift contribution is not completely accounted for by the transonic small-disturbance equation. Parametric estimates based on existing transonic transport proposals indicate significant lift effect on the nonlinear outer flow. Relaxation methods based on second-order difference schemes are developed to solve the reduced lift problem in the thickness-controlled domain. (Author Modified Abstract)

Descriptors :   (*SWEPTBACK WINGS, TRANSONIC CHARACTERISTICS), LIFT, FLOW FIELDS, MATHEMATICAL MODELS, THREE DIMENSIONAL FLOW, LEADING EDGES, YAW, THICKNESS, SURFACE PROPERTIES

Subject Categories : Aerodynamics
      Aircraft
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE