Spanwise Redistribution of Energy and Loss in an Axial Flow Compressor by Wake Centrifugation.
Abstract
The objective of this program was to develop and codify a method for predicting the spanwise redistribution of energy and loss associated with rotor/stator 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) accumulation/dilution 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 decrements/increments 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1985
- Accession Number
- ADA159312
Entities
People
- C. W. Whitfield
- J. S. Keith
Organizations
- General Electric