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Loss Due to Leakage in Unshrouded Radial Impellers

Published online by Cambridge University Press:  28 July 2016

L. G. Valdenazzi
L. G. Valdenazzi*
Affiliation:
University of Genoa, Head, Gas Turbine Research Dept., Ansaldo Co., Genoa
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Extract

Unshrouded impellers of centrifugal compressors and centripetal turbines manifest an increase of the flow losses in comparison with the shrouded ones. Assuming that the controlling factor in such increase of loss is the leakage through the gap between wheel and casing, the author develops a simple theory leading to a formula for the volumetric efficiency. Only one experimental quantity is required for applying the formula; and tentative values, based on some experimental evidence, are presented.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 60 , Issue 542 , February 1956 , pp. 132 - 134
Copyright
Copyright © Royal Aeronautical Society 1956

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References

1. Mager, , Mahoney, , Budinger, (1952). Discussion of Boundary Layer Characteristic Near the Wall of an Axial Compressor. N.A.C.A. Report 1085, 1952.Google Scholar
2. Pantell, (1949). Versuche ueber Scheibenreibung. Forschung 16, 4, p. 37, 1949-50.Google Scholar