The quantified research of the turbulence model of ejector based on CFD

Oxygen regulator is the important component of oxygen-supply system. Experiences shown that when the oxygen regulator worked, the pressure of breathing gas through mask would be lost. The gas pressure value in the mask cavity would be lower than the set value of the pressure system. The pressure may cause some problems such as pressure drop as well. As the typical ergonomics problem of aircraft oxygen-supply system, the working-effectiveness of pilots could be influenced by the pressure loss. A series of studies shown that the design of ejector structure was the effective method to solve the problem. The reasonable turbulence model should be established so as to design a reasonable ejector structure. The paper quantified the various turbulence models of the ejector through numerical simulation, and the data shown that compared with the test results, the results of SST model was the closest. In summary, the SST model could effectively simulate the internal flow of the ejector and the numerical results of SST model were significantly better than other models. The research of this paper could make contributions to the design of the ejector.