Calculation of the Added Mass and Damping Forces on Supercavitating Bodies

Fine, Neal E. and Uhlman, James S. and Kring, David C. (2001) Calculation of the Added Mass and Damping Forces on Supercavitating Bodies. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA.

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Abstract

A linearized formulation for the unsteady forces experienced by supercavitating bodies is developed in terms of their added mass and damping coefficients. The formulation is general, but is applied here using an axisymmetric base flow. Expressions for the added mass, damping and restoring tensors are derived in a form suitable for incorporation in a numerical “flight” simulation tool for supercavitating vehicles. Disk and conical cavitating bodies are investigated. It is found that the added mass in surge can actually be negative for small values of the reduced frequency. The physical interpretation of this phenomenon is provided.

EPrint Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	supercavitating vehicles, unsteady forces, added mass and damping forces
Subjects:	All Records Session B3 Attached Cavitation 3
ID Code:	166
Deposited By:	Neal Fine
Deposited On:	30 April 2001
Record Number:	CAV2001:sessionB3.006
Official Persistent URL:	http://resolver.caltech.edu/CAV2001:sessionB3.006
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