Influence of Weight Parameters on Oscillation Characteristics of Supercavitating Vehicle
The influence of weight parameters on the oscillation characteristics of supercavitation vehicle is studied.A simulation model of the coupling of supercavitation flow field and rigid body motion is established by combining VOF multiphase flow model,realizable k-ε turbulence model,Schnerr-Sauer cavitation model and the rigid body motion equations.The proposed model is validated by comparing the simulated results with the published test results.The influences of mass and centroid position on the oscillation characteristics of supercavitation vehicle are quantitatively summarized by simulating and studying its free motion characteristics.The research findings reveal that the simulated results of the proposed simulation model are consistent with the experimental data,showing a 1/4 cycle phase difference between pitch and yaw angles.The oscillation period is approximately 0.079 5 seconds with a deviation not exceeding 3.38％,indicating the reliability of the proposed simulation model.The free motion of supercavitating vehicle exhibits"cone-like"dynamic oscillation characteristics;With the decrease of the mass of the vehicle,the oscillation amplitude of attitude angle is basically unchanged,and the oscillation period of the trajectory gradually decreases.The oscillation period is decreased by 13.26％when the mass of the vehicle is decreased by 33.33％.The oscillation amplitude of attitude angle is gradually increased and the oscillation period of trajectory is decreased by decreasing the distance of mass center away from the cavitator.The oscillation period is decreased by 14.29％when the mass center distance is decreased by 25％.
supercavitating vehicleweight parameteroscillation periodsupercavitation flow field
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