Accession Number:

ADP007691

Title:

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

Descriptive Note:

Corporate Author:

PARIS-11 UNIV ORSAY (FRANCE)

Personal Author(s):

• Gerolymos, George A.

Report Date:

1992-02-01

Pagination or Media Count:

19.0

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