Accession Number : ADP007691

Title :   On the Computation of Unsteady Turbomachinery Flows Part 1 Euler Equations in Vibrating Cascades,

Corporate Author : PARIS-11 UNIV ORSAY (FRANCE)

Personal Author(s) : Gerolymos, George A.

Report Date : FEB 1992

Pagination or Media Count : 19

Abstract : The purpose of this paper is to present a methodology for unsteady flow analysis in vibrating transonic compressor cascades, using Euler equations. After a brief discussion of the problem, the numerical algorithm is presented, for the 3-D case, with particular emphasis on grid displacement procedures, slip-surface-fitting, boundary-conditions and their effect on computational results. Chorochronic flow periodicity and modal superposition are briefly discussed. Several results from realistic aircraft engine turbomachinery configurations are presented.

Descriptors :   *TURBOMACHINERY, *UNSTEADY FLOW, AIRCRAFT, AIRCRAFT ENGINES, ALGORITHMS, BOUNDARIES, COMPRESSORS, CONFIGURATIONS, DISPLACEMENT, ENGINES, EQUATIONS, FITTINGS, FLOW, GRIDS, METHODOLOGY, PAPER, PERIODIC VARIATIONS, COMPUTATIONS, CASCADES(FLUID DYNAMICS), VIBRATION.

Subject Categories : Fluid Mechanics
      Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE