Numéro : 2216 - Year : 1993

On cavitation or screw-propellers in non-axial flow

P. CASSELLA, Dipartimento di Ingegneria Navale, Universita "Federico II'', Napoli
M. MANDARINO, Dipartimento di Ingegneria Navale, Universita "Federico II'', Napoli
S. MIRANDA, Dipartimento di Ingegneria Navale, Universita "Federico II'', Napoli
A. SCAMARDELLA, Dipartimento di Ingegneria Navale, Universita "Federico II'', Napoli

The cavitation problem is discussed, in a general form, pointing out the influence on the phenomenon of the geometric blade section properties and the fluid velocity. The variations of the fluid velocity are then determined in non-axial flow, utilizing the wing section theory. An equation is so determined which shows that the cavitation conditions can occur in non-axial flow for angular positions and cavitation indexes different from ones in axial flow A method, based on the wing section theory, is developed for the derivation of the cavitation limit conditions in non-axial flow by ones relative to axial flow

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