中文摘要：

理论推导激波管中相变加热的临界加热量,得到一个显式计算临界加热量公式.该式可广泛用于湿蒸汽或纯蒸汽相变加热流动计算.结果表明,考虑相变加热的临界加热量要大于外部加热的临界加热量;热壅塞时会产生一道向上游传播的凝结激波,且凝结激波位置在液相质量分率开始增长点之前.采用AUSM格式数值求解激波管中湿空气的凝结流动,理论预测与数值计算吻合良好.

英文摘要：

An explicit equation for critical quantity of heat in condensing flow in a shock tube was derived. The equation is of general validity and applies to vapor flow with or without carrier gas. It shows that critical quantity of heat in internal heat flow for phase change is greater than external heat flow. As flow is choked thermally, a shock wave is generated and propagates upstream. A location where local static pressure begins to rises, which has long been regarded as onset of unsteady condensation in a steady supersonic nozzle, is not acceptable in shock tube flow. It is before the zone of condensation. Furthermore, a second-order AUSM scheme is applied to two- dimensional compressible flow with condensation. Computation results reproduce integral predictions well.