Numerical modeling and experimental research of a two-phase liquid- gas ejector with a profiled supersonic nozzle

A two-phase liquid-gas ejector with a supersonic nozzle is described in the article. The results of numerical modeling of the processes occurring in it and forming a two-phase jet are presented. The structure of a two-phase flow formed by the ejector and the velocity field of the dispersed phase are experimentally investigated. The characteristic curves of the ejected gas flow for different values of the working fluid consumption are obtained and the rarefaction achieved by the ejector is measured. The ejector ensures the system’s operation that forms two-phase high-concentration gas-droplet jets at different flow rates and pressures of working bodies. It is established that, due to the presence of air in a two-phase working body, a two-phase jet at the exit from the ejector accelerates in the initial section and then is decelerated. The results of the numerical modeling of internal processes occurring in a two-phase liquid-gas ejector are presented in fluid and gas dynamics ANSYS software application packages on the basis of analyzing a small-scale model. The characteristics of the energy efficiency of a full-size jet device are given, as compared to production prototypes. The prospects of using liquid-gas jet devices for high-altitude testing of jet engines and their units are indicated.