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The authors have performed a very systematic investigation of tip vortex cavitation inception under various conditions of nuclei seeding. They propose a correction of the incipient cavitation number in order to collapse the data for two seeding conditions (small and large bubbles) in a now classical σc/Re0,4 versus Cp2 plot.
I have 2 types of questions
Why has the VAG method not been used to try to correlate also the data for the “no bubbles” situation? Have the measurements of (pc-pu) been conducted? How do the authors explain the very large velocity effects in Figure g?
It has been proposed, and used with good success, to obtain the “susceptibility” pressure directly from tip vortex tests (by plotting the difference between the free stream pressure for cavitation inception minus the vapor pressure as a function of the velocity to the power 2,4 for constant incidence angle). Why have the authors not performed these tests and why there is no comparison between theirs and previous methods?
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Inception, Development, and Noise of a Tip Vortex Cavitation ."
Twenty-First Symposium on Naval Hydrodynamics . Washington, DC: The National Academies Press,
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