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When the high pressure gas is exhausted to atmosphere, the expanded supersonic jet is formed at a specific condition. In reality, the steam or moist air is usually used as working gas of supersonic moist air jet technologies. In these cases, non-equilibrium condensation may occur within the supersonic jet flow, and there are some researches on this phenomenon. On the other hand, in reality, there is a variety of engineering applications for discharge of the dry air into the atmosphere containing moist air or steam. In this case, non-equilibrium condensation may occur locally within the shear layer and affect the jet structure or energy loss in the flow field. However, the characteristics of non-equilibrium condensing flow in the jet shear layer are not investigated so far satisfactorily. The purpose of this study is to clarify the effect of local occurrence of non-equilibrium condensation in the shear layer on the characteristics of an under- expanded supersonic jet numerically. As a result, it was found that non-equilibrium condensation in shear layer affected the jet entrainment effect

Characteristics of Condensing Flows in Shear Layer of Axisymmetric Supersonic Jets