Accession Number : ADP001944

Title :   Prediction of Subsonic Separation Bubbles on Airfoils by Viscous-Inviscid Interaction,

Corporate Author : GENERAL MOTORS CORP INDIANAPOLIS IN ALLISON GAS TURBINE OPERATIONS

Personal Author(s) : Kwon,O. K. ; Pletcher,R. H.

Report Date : 1981

Pagination or Media Count : 9

Abstract : An iterative viscous-inviscid interaction calculation procedure is used to predict leading edge and midchord separation bubbles on airfoils in steady subsonic flow. The procedure utilizes an inverse finite-difference boundary layer calculation scheme to predict the viscous flow and a direct Hilbert integral formulation for the inviscid flow. Three models for laminar-turbulent transition are discussed. Predictions are compared with experimental measurements for several transitional separation bubble flows at angles of attack up through 7 deg. (Author)

Descriptors :   *Airfoils, Subsonic flow, Separation, Bubbles, Viscous flow, Boundary layer, Finite difference theory, Angle of attack, Viscous flow, Inviscid flow, Interactions

Distribution Statement : APPROVED FOR PUBLIC RELEASE