Abstract
Three well known profiles of distinguishing form used for blade element, namely Clark Y, Clark Y.H. and R.A.F. 6 have been tested in the cavitation tank of Tohoku University, Sendai Japan, for a study of the effects of form on the cavitation characteristics. The thickness-to-chord ratios of the each profiles are 11 7 and 6 percent respectively, namely 6 profiles have been taken for the test. The aim of the experiment is to provide some data of profiles suitable for blade elements of axial water turbines, pumps and ship propellers. The experimental results have been obtained concerning chiefly to the following items : (1) on the condition of cavitation occurrence, (2) the change of the lift and drag due to the cavitation factor, (3) the polar diagrams at the different degree of cavitation, (4) the comparison of the cavitation characteristics of the three profiles.
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