The present study deals with the visualization of the droplet condensation phenomenon that can occur in ejectors powered by moist air. The condensation process is visualized through a numerical model of non-equilibrium condensation in high speed flows implemented by the present authors in a CFD code. The evolution of the region of condensation in the ejector with the primary stagnation pressure is examined both in the case without secondary flows and in the case with free entrainment of induced air. Laser tomography visualization is used to validate the computational results. The effects of some parameters such as the primary stagnation pressure and the humidity ratio in the primary and secondary air flows are also examined. Limitations of the present numerical model are discussed.

中文翻译：

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超音速喷射器冷凝过程的实验和数值可视化

本研究涉及在潮湿空气驱动的喷射器中可能发生的液滴凝结现象的可视化。通过本作者在 CFD 代码中实现的高速流动中非平衡冷凝的数值模型，冷凝过程可视化。在没有二次流的情况下和在引入空气自由夹带的情况下，检查了喷射器中冷凝区域与初级停滞压力的演变。激光断层扫描可视化用于验证计算结果。还检查了一些参数的影响，例如一次停滞压力和一次和二次空气流中的湿度比。讨论了当前数值模型的局限性。