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Observations on Off-Design Flows in Non-Cavitating Axial Flow Inducers

Bhattacharyya, Abhijit and Acosta, Allan J. and Brennen, Christopher E. and Caughey, Thomas K. (1993) Observations on Off-Design Flows in Non-Cavitating Axial Flow Inducers. In: ASME Symposium on Pumping Machinery. Fluids Engineering Division. Vol.FED-154. No.154. American Society of Mechnical Engineers , New York, pp. 135-141. http://resolver.caltech.edu/CaltechAUTHORS:BHAfed93

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Abstract

This paper describes an investigation of the flows in unshrouded and shrouded inducers which are known to be highly complex, three dimensional flows with real fluid effects. A flow visualization technique using tufts and paint dots was used to study the flows on the blade, hub and housing at off-design flows. It was found that the blade boundary layer flows were attached to the blade surface and that leakage flows were the cause of the upstream swirling backflow in unshrouded inducers. It was also found that shrouded inducers showed flow reversal near the leading edge in addition to the discharge-to-suction leakage flow. The observations provide a better understanding of the internal flows and the occurrence of upstream backflows.


Item Type:Book Section
Additional Information:The authors would like to thank the NASA George C. Marshall Space Flight Center for sponsoring the work reported in this paper under grant NAG8-118, technical monitor Henry Stinson. The assistance provided by Asif Khalak in conducting the experiments is also appreciated.
Record Number:CaltechAUTHORS:BHAfed93
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BHAfed93
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37
Collection:CaltechAUTHORS
Deposited By: Christopher Brennen
Deposited On:29 Oct 2004
Last Modified:26 Dec 2012 08:38

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