Accession Number : AD0734591

Title :   Measured and Predicted Secondary Flows in a Centrifugal Impeller,

Corporate Author : WATERLOO UNIV (ONTARIO) DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Howard,J. H. G. ; Lennemann,E.

Report Date : 13 JAN 1970

Pagination or Media Count : 7

Abstract : The complete velocity distribution, including both primary and secondary velocities, has been measured in passages of centrifugal impellers of simple shape. Comparison is made with theoretically predicted secondary vorticities based on a simple combination of an inviscid primary flow and a streamwise vorticity generation analysis. The measured velocities were obtained in a water-flow impeller rig using a miniature, cylindrical, hot-film probe positioned on the rotating impeller and traversed and controlled remotely through slip rings. The understanding of the complex flow patterns was assisted by a photographic study employing a hydrogen bubble, flow visualization technique. (Author)

Descriptors :   (*TURBINES, *SECONDARY FLOW), (*IMPELLERS, FLOW FIELDS), TEST EQUIPMENT, MATHEMATICAL PREDICTION, AERODYNAMIC CONFIGURATIONS, FLOW VISUALIZATION, VORTICES, CENTRIFUGAL FIELDS, CANADA

Subject Categories : Non-electrical Energy Conversion
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE