Study on Influence of Tube-Exit Conditions on Dynamic Evolution of Tail Cavity Attached to Underwater Vehicle
For the dynamic evolution of tail cavity of underwater vehicle,the numerical simulation method of tube-exit multiphase flow is developed based on Reynolds averaged N-S equations combined with dynamic mesh technique.The numerical simulation method is verified by comparing with the experimental results.Based on simulation calculations,the influence of different conditions such as pressure difference of tube-exit,launching depth and tube-exit velocity on the tail cavity pressure and morphology is studied,understanding of the cavity closing process under different conditions and the peak and period of pressure oscillation inside the cavity is obtained,and the dimensionless parameter which can comprehensively characterize the influence of different tube-exit conditions is formed by dimensional analysis.Under the same condition of the dimensionless parameter,the changes of tail cavity pressure and morphology are consistent in different working conditions.
Tail cavity oscillationPressure difference of tube-exitLaunching depthTube-exit velocity
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