高能激光破岩的传热学特性研究

Research on Heat Transfer Characteristics of the Removal Rock by Laser

高能激光破岩中激光与岩石相互作用的过程,是一个复杂的非稳定的传热学问题。利用能量守恒原理,得到了激光破岩的传热方程,并对其相变过程中固液相变界面、液气界面上的焓、导热系数和比热等热物性参数进行了近拟简化,从而建立了激光破岩温度场分析的物理模型。利用 Galerkin 方法,对激光破岩的温度场模型进行了数值分析求解和实例计算。

The interaction between laser and rock is a complicated and unsteady problem of heat transfer science. According to the energy conservation law, the fundamental equation of heat transfer is established. Some primary parameters such as enthalpy, thermal conductivity and specific heat are simplified respectively, on the liquid-gas interface or the liquid-solid interface. The general mathematical model of temperature field on laser drilling process is proposed. Using the Galerkin method, the numerical investigation of a practical example in laser drilling rock is analyzed.