Visualization Studies of Secondary Flows With Applications to Turbomachines

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Abstract
The investigation reported in this paper is intended mainly as an exploratory inquiry into some fundamental aspects of the boundary-layer flows in turbomachines. These studies are preliminary to a more complete analysis of the flow in turbomachines. Nevertheless, the insight obtained into the secondary-flow patterns and behavior is fundamental in nature. Thus it may provide a basis for correlation and interpretation of other experimental data. When flow conditions are sufficiently similar to those which existed in these studies, the conclusions drawn from these tests may likewise serve to extend the understanding and correlation of other experimental data. It is further anticipated that the flow behavior observed experimentally in the various configurations may prove useful as a means for evaluating the reasonableness of various simplifying assumptions used in theoretical analyses. In particular, it might serve as a criterion both in the initial selection of the assumptions and in estimations of the physical validity of analytically obtained results.

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