Accession Number : ADA131185

Title :   Large-Scale Separation and Wake Closure/Reattachment - The Cascade Problem,

Corporate Author : UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT

Personal Author(s) : Smith,F T

PDF Url : ADA131185

Report Date : May 1983

Pagination or Media Count : 100

Abstract : This work aims at application in both internal and external flows. An analytical and computational study is described which attempts ultimately to uncover the nature of the flow structure surrounding the wake closure region of a long recirculatory eddy following separation off an isolated aerodynamic element. This problem area forms a critical element in the development of a formally rational model for a massive separation eddy at large Reynolds number. An approach is developed here for addressing the external aerodynamic problem through a family of internal, cascade flow, solutions with increasing gap spacing. Each element of this family is formally correct, thus providing a basis for systematic study of the desired limit case of an infinite gap spacing. The study is in two parts. Part I presents the structure for finite gap spacing and the corresponding computational results. Part II discusses the possible flow structures emerging for widely spaced cascades and their connection with, and implications for, the external aerodynamic flow. (Author)

Descriptors :   *Cascades(Fluid dynamics), *Equations, Wake, Closures, Reynolds number, Aerodynamics, Computations, Boundary layer, Configurations, Incompressible flow, Steady flow, Flow separation, Laminar flow

Subject Categories : Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE