7. Key Words (Suggested by Author(s)) Cavitation Pumps

This document constitutes the second of four volumes to be issued on the results of continuing cavitation studies. Boundary layer principles, along with two-phase flow concepts, a r e used to improve existing correlative theory for developed cavity data. Details concerning cavity instrumentation, data analysis, correlative techniques, and experimental and theoretical aspects of a cavitating hydrofoil are given. Both desinent and thermodynamic data, using liquid hydrogen and liquid nitrogen, are reported here. The thermodynamic data indicated that stable thermodynamic equilibrium exists throughout the vaporous cryogen cavities. The improved correlative formulae were used to evaluate these data.-4 new correlating param-eter, based on consideration of mass limiting two-phase flow flux across the cavity interface, is proposed. This correlating parameter appears attractive for future correlative and pre-dictive applications. Agreement between theory and experiment is discussed, and directions for future analysis are suggested. The front half of the cavities, developed on the hydrofoil, may be considered as parabolically shaped. 3. Recipient's Catalog No