Noise generated by ventilated supercavities

The noise generated by ventilated supercavities has been explored experimentally in a water tunnel facility. The most prominent acoustical characteristic is the monopole behavior exhibited by a ventilated supercavity in its pulsating closure regime. The interior cavity pressure and near-field radiated sound are monotonic with a frequency that is related to the speed and length of waves propagating on the supercavity gas/water interface. The cavity interior pressure spectrum level is shown to be related to the near-field and far-field noise spectrum level through spherical spreading of the sound waves from the supercavity interface. As a result, the cavity interior pressure can be used as a measure of the radiated noise. The noise radiated by a pulsating supercavity at the pulsation frequency is at least 40 dB above that radiated by comparable re-entrant jet and twin vortex cavities.

[1]  R. Arndt,et al.  Investigation of the Behavior of Ventilated Supercavities , 2011 .

[2]  L. C. Woods.  On the instability of ventilated cavities , 1966, Journal of Fluid Mechanics.

[3]  Steven Deutsch,et al.  High Reynolds Number Liquid Flow Measurements , 1989 .

[4]  Emil V. Paryshev.  Approximate mathematical models in high-speed hydrodynamics , 2006 .

[5]  T. Brungart,et al.  On self-noise at the nose of a supercavitating vehicle , 2009 .

[6]  V. Semenenko.  Artificial Supercavitation. Physics and Calculation , 2001 .

[7]  Emil V. Paryshev,et al.  Mathematical Modeling of Unsteady Cavity Flows , 2003 .

[8]  Timothy A. Brungart,et al.  Sound Generated by Gas-Jet Impingement on the Interface of a Supercavity , 2008 .

[9]  J. Michel,et al.  Air Entrainment in Ventilated Cavities: Case of the Fully Developed “Half-Cavity” , 1984 .

[10]  J. M. Michel.  Some Features of Water Flows With Ventilated Cavities , 1984 .

[11]  Charles C. S. Song,et al.  Pulsation of Ventilated Cavities , 1962 .

[12]  C. Brennen.  A numerical solution of axisymmetric cavity flows , 1969, Journal of Fluid Mechanics.

[13]  Yuriy N. Savchenko.  SUPERCAVITATION - PROBLEMS AND PERSPECTIVES , 2001 .

[14]  P. Rogers,et al.  The effects of external acoustic pressure fields on a free-running supercavitating projectile. , 2010, The Journal of the Acoustical Society of America.

[15]  Timothy A. Brungart,et al.  Spectrum of the sound produced by a jet impinging on the gas–water interface of a supercavity , 2010 .

[16]  Albert May,et al.  Water Entry and the Cavity-Running Behavior of Missiles , 1975 .

[17]  Vladimir N Semenenko.  Dynamic Processes of Supercavitation and Computer Simulation , 2001 .

[18]  C. Song,et al.  Instability of Ventilated Cavities , 1959 .

[19]  J. Spurk.  On the gas loss from ventilated supercavities , 2002 .

[20]  Ivan N. Kirschner,et al.  IMPLEMENTATION AND EXTENSION OF PARYSHEV'S MODEL OF CAVITY DYNAMICS , 2008 .