V.N.Semenenko Pulsation of ventilated cavities at various closure conditions |
Applied hydromechanics, Vol. 13 (85) ¹ 4, (2011) |
| Nonlinear self-induced oscillation (pulsation) arising after loss of stability of ventilated cavities closing on a cylindrical body or at the free closure is numerically investigated. It is shown that both discontinuous and continuous self-induced oscillation are possible at taking into account the permanent gas-loss from cavity. An analysis of influence of the body diameter, the cavity blocking-up by a body and other factors on the oscillation frequency and amplitude is given. An universal power law approximating the known laws of gas-loss from ventilated cavities at the free closure is proposed. Using this, the problem on the gas-loss law influence onto the cavity stability is considered. |
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KEY WORDS: ventilated cavities, oscillation, gas-loss law |
| TEXT LANGUAGE: Russian |