Journal of Fluids Engineering

Volume: Page/CID:

Assessment of DES Models for Separated Flow From a Hump in a Turbulent Boundary Layer
Separated flow past a hump in a turbulent boundary layer is studied numerically using detached-eddy simulation (DES), zonal detached-eddy simulation (ZDES), delayed detached-eddy simulation (DDES), an...

Cavitation Inception in the Wake of a Jet-Driven Body
Although cavitation inception in jets has been studied extensively, little is known about the more complex problem of a jet flow interacting with an outer flow behind a moving body. This problem is st...

J. Fluids Eng. / Volume 131 / Issue 11 / Research Papers / Multiphase Flows

Creation and Maintenance of Cavities Under Horizontal Surfaces in Steady and Gust Flows

J. Fluids Eng. -- November 2009 -- Volume 131, Issue 11, 111301 (10 pages)
doi:10.1115/1.4000241

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ABSTRACT

REFERENCES (12)

Author(s):
R. E. A. Arndt, W. T. Hambleton, and E. Kawakami
Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55414

E. L. Amromin
Mechmath LLC, Prior Lake, MN 55372-1283

Anexperimental study of air supply to bottom cavities stabilized withina recess under a horizontal surface has been carried outin a specially designed water tunnel. The air supply necessaryfor creating and maintaining an air cavity in steady andgust flows has been determined over a wide range ofspeed. Flux-free ventilated cavitation at low flow speeds has beenobserved. Stable multiwave cavity forms at subcritical values of Froudenumber were also observed. It was found that the cross-sectionalarea of the air supply ducting has a substantial effecton the air demand. Air supply scaling laws were deducedand verified with the experimental data obtained.