Abstract
Abstract Impinging jet on a solid surface can be found in various engineering applications. In the flow fields, the characteristics of impinging jet are generally found to become complex extremely. In various industrial jet technologies such as jet burner, steam turbine and so on, condensable gas is often used as working gas. In these cases, the non-equilibrium condensation may occur at the region between nozzle exit and an object. On the other hand, in reality, there is a variety of engineering applications for discharge of the dry air into the atmosphere with moisture. In this case, non-equilibrium condensation may occur in the shear layer and affect the jet structure or energy loss in the flow field. However, the feature of non-equilibrium condensing flow in the jet shear layer are not investigated so far satisfactorily. In the present study, the effect of local occurrence of non-equilibrium condensation in shear layer on the characteristics of an under-expanded supersonic impinging jet was investigated numerically. As a result, non-equilibrium condensation occurred in shear layer and increased the displacement thickness on flat plate.
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