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In the present study,a computational fluid dynamics method has been applied to investigate the effects of initialdegree of supersaturation at reservoir condition on under-expanded sonic jet structures,such as Mach disk loca-tion and diameter,barrel shock wave and jet boundary.The axisymmetfic nozzle geometry investigated was aconverging nozzle with straight part.As a result,it was found that the overpressures due to condensation generateand the characteristics of flow with generation of overpressure due to condensation in the jet were different fromthose without condensation.
In the present study, a computational fluid dynamics method has been applied to investigate the effects of initial de gree of supersaturation at reservoir conditions on under-expanded sonic jet structures, such as Mach disk loca tion and diameter, barrel shock wave and jet boundary. axisymmetfic nozzle geometry investigated the aconverging nozzle with straight part. As a result, it was found that the overpressures due to condensation generate and the characteristics of flow with generation of overpressure due to condensation in the jet were different fromthose without condensation.