Accession Number : ADP006215

Title :   Secondary Flow Measurements with L2F-Technique in Centrifugal Compressors,

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V COLOGNE (GERMANY F R)

Personal Author(s) : Krain, H.

Report Date : SEP 1987

Pagination or Media Count : 10

Abstract : The flow character of a 30 deg. backswept impeller is analyzed by means of the L2F-measurement technique available at DFVLR. Significant cross flows, noticeable distortions of the through flow patterns and considerable velocity fluctuations are found inside the blade passages of the impeller. The distortions of the velocity patterns are smoothing towards the impeller exit. A detailed analysis of the measured data reveals the existence of two counterrotating channel vortices that are significantly influencing the overall flow character.

Descriptors :   *CENTRIFUGAL COMPRESSORS, SECONDARY FLOW, MEASUREMENT, ROTOR BLADES(TURBOMACHINERY), CENTRIFUGAL COMPRESSORS, CHANNELS, COUNTERROTATION, EXITS, FLOW, IMPELLERS, MEASUREMENT, PATTERNS, SECONDARY FLOW, VARIATIONS, VELOCITY, VORTICES.

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE