一维激波管黎曼问题的精确解（用于求解一维激波管黎曼问题）-Riemann shock tube problem of one-dimensional exact solution (one-dimensional shock tube used to solve the Riemann problem)

一维激波管问题的精确解，可以直接用，非常经典的计算流体力学算例之一。(one dimensional problem)