【作者】 李其弢； 胡天群； 何友声；

【Author】 Ji-tao Li Tianqun Hu Yousheng He (Dept.of Eng.Mechanics,Shanghai Jiaotong University,Shanghai,200240,China)

【机构】 上海交通大学船舶海洋与建筑工程学院；

【摘要】 超空泡技术的应用,大大降低了水下物体在高速运动时受到的阻力(最大可减阻90%)。同时,超空泡的出现改变了水下物体在航行时的受力方式,使超空泡水下航行体的运动方式及其控制模式成为新的研究课题。本文针对超空泡水下航行体运动过程中的摆动现象,在水洞中模拟了航行体尾部与超空泡壁面的反复碰撞过程。通过专门设计的摆动机构的驱动,研究了航行体在通气超空泡中,不同摆动频率与摆动幅度相组合,模型后体运动对超空泡稳定性的影响。实验同时对航行体摆动过程中的受力过程进行了测量,分析了超空泡模型在摆动运动中的水动力学特性。更多还原

【Abstract】 The formation of the supercaviting flow results in a significant(up to 90%) reduction in drag for an underwater vehicle.The supercavitation changes the vehicle’s dynamics and gives severe challenges to motion control and trajectory stability.The interaction of the aft body of the vehicle with the cavity wall pitches within the supercavity was discussed in the present paper.The experiment was conducted in a water tunnel.Impacts between the vehicle and the ventilated supercavity were measured.The stability of supercaviting flow with different pitching frequencies and amplitudes was studied.The characteristics of the drag,lift and moment for a supercavitating vehicle with the oscillatory mode motive while impacts occurred were investigated.更多还原