The effects of external acoustic pressure fields on a free-running supercavitating projectile
| Autor: | Peter H. Rogers, John W. Doane, Peter J. K. Cameron |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Time Factors Acoustics and Ultrasonics Projectile Acoustics Transducers Water Flight dynamics (fixed-wing aircraft) Models Theoretical Signal Sound intensity Motion Nonlinear acoustics Sound Arts and Humanities (miscellaneous) Nonlinear Dynamics Cavitation Hydrodynamics Linear Models Pressure Computer Simulation Weapons Sound pressure Supercavitation |
| Zdroj: | The Journal of the Acoustical Society of America. 128(6) |
| ISSN: | 1520-8524 |
| Popis: | Proliferation of supercavitating torpedoes has motivated research on countermeasures against them as well as on the fluid phenomenon which makes them possible. The goal of this research was to investigate an envisaged countermeasure, an acoustic field capable of slowing or diverting the weapon by disrupting the cavitation envelope. The research focused on the interactions between high pressure amplitude sound waves and a supercavity produced by a small free-flying projectile. The flight dynamics and cavity geometry measurements were compared to control experiments and theoretical considerations were made for evaluating the effects. Corrugations on the cavity/water interface caused by the pressure signal have been observed and characterized. Results also show that the accuracy of a supercavitating projectile can be adversely affected by the sound signal. This research concludes with results that indicate that it is acoustic cavitation in the medium surrounding the supercavity, caused by the high pressure amplitude sound, that is responsible for the reduced accuracy. A hypothesis has been presented addressing the means by which the acoustic cavitation could cause this effect. |
| Databáze: | OpenAIRE |
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