A Study of Boundary-Layer Characteristics of Turbomachine Blade Rows and Their Relation to Over-All Blade Loss

[+] Author and Article Information
Warner L. Stewart, Warren J. Whitney, Robert Y. Wong

Lewis Research Center, NASA, Cleveland, Ohio

J. Basic Eng 82(3), 588-592 (Sep 01, 1960) (5 pages) doi:10.1115/1.3662671 History: Received April 08, 1959; Online November 04, 2011


This paper presents the results of a number of investigations concerned with the boundary-layer characteristics of turbomachine blade rows and their relation to the over-all blade loss. It is demonstrated how the over-all blade loss can be obtained from the momentum boundary-layer thickness. The momentum boundary-layer thickness is in turn shown to be correlated by flow Reynolds number and total blade surface diffusion. By assuming Zweifel’s form of blade-loading diagram the total blade surface diffusion parameter can be determined as a function of blade solidity and reaction across the blade row. Thus, this type of loss analysis enables an approximate predetermination of the over-all blade row loss as derived from fundamental boundary-layer concepts. In addition, it shows the effect on over-all blade loss of varying such design features as solidity and reaction.

Copyright © 1960 by ASME
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