Accession Number:

ADA159312

Title:

Spanwise Redistribution of Energy and Loss in an Axial Flow Compressor by Wake Centrifugation.

Descriptive Note:

Final rept. 15 Sep 81-15 Mar 84,

Corporate Author:

GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE BUSINESS GROUP

Personal Author(s):

Report Date:

1985-05-01

Pagination or Media Count:

119.0

Abstract:

The objective of this program was to develop and codify a method for predicting the spanwise redistribution of energy and loss associated with rotorstator wakes in an axial-flow compressor. The mechanisms considered were 1 spanwise transport of wake fluid due to imbalance of the radial pressure gradient and 2 accumulationdilution of wake fluid at the inner and outer casing. The work consisted of developing computer modules that perform the above defined objectives. This report describes mathematical formulas derived for definition of the peak radial and streamwise velocity decrementsincrements in a wake at a blade trailing edge and their decay with downstream distance. Comparisons with data show good agreement in most cases. In addition, the thickness, displacement thickness, and momentum thickness of the wake were calculated and used in the prediction of changes in the circumferential average flow solution caused by the migration of wake fluid across streamlines. Keywords Secondary flow, Spanwise mixing.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE