激光等离子体空泡动力学特性研究

从理论模型、实验、数值模拟三方面综合研究了液体粘度和激光能量对激光空泡产生、成长、溃灭特性的影响。理论方面,建立了一个有所改进的空泡动力学模型;实验方面,利用两套基于光纤耦合光偏转法的实验装置,研究了空泡脉动、冲击波以及射流的细节过程;数值模拟方面,采用有限差分法进行数值计算,分析了所提出模型的优越性。研究结果可为水下激光加工、激光医疗、空化空蚀相关流体力学的研究提供一定的理论和实验支持。

Investigation of the Dynamics of Laser-generated Cavitation Bubble

The influence of mucosity of the liquid environment and energy of the laser pulse on the producing, evolvement and collapsing of a Laser-induced cavitation bubble are investigated synthetically through theoretic analyze, experiment and numerical simulation. In theory, a revising is made to the existing bubble kinetic model. In experiment, by two set of experiment devices based on fiber-coupling beam deflection principle, the details of the pulsatile bubble, shock waves and the liquid-jet are investigated synthetically. In numerical simulation, the finite difference arithmetic is used. These research results could support theoretically and experimentally the application of laser processing underwater, laser medicine, and cavitation corrosion corresponding hydromechanical study.