减阻剂溶液注入对回转体通气空化的影响

This study investigates the effect of injecting drag-reducing surfactant solution on the characteristics of ventilated cavitation around an axisymmetric underwater vehicle. The injection site is placed before the ventilated cavity, and numerical simulations are conducted on the four-phase ventilated cavitating flows of a liquid water-water vapor-air-drag-reducing solution by adopting the SST k - ω turbulence model, the Schnerr-Sauer cavitation model, and the mixture multiphase flow model. When the ventilation rate are 9.42×10^-4 m³/s and 2.83×10^-3 m³/s, the injection of the drag-reducing surfactant solution significantly enlarges the cavity and reduces the resistance of the axisymmetric body in the range of partial cavitation. However, in the supercavitation range, the variation of cavity shape is not obvious, and only the viscous resistance decreases. This study provides a basis of novel techniques for the control of cavitating flow by using a drag-reducing surfactant solution.