The Mathematical Model Of Fluid Flow In Hyperbaric Oxygen Chamber Was Established And It Was Analysised By The Finite Element Method

In order to reduce the noise of the hyperbaric oxygen chamber and design hyperbaric oxygen chamber rapidly,this paper established a mathematical model of hyperbaric oxygen chamber. Firstly, this paper calculates the conservative state equation of flow field in the hyperbaric oxygen chamber by flux vector splitting computational format. Being auxiliary to initial conditions, boundary condition, meshing and time step and other computing elements, I get the transient distribution of the parameters of each time step from flowing start to its nearly stop. Through the graphic display of data, I get flow velocity variation, the location of the shock wave and the change of pressure and temperature. Secondly, I compared the numerical results and experimental results. And found their similarity degree is high. It proved the feasibility to research the tendency of the flow by numerical calculation qualitatively. Thirdly, this paper simulates the flow field in hyperbaric oxygen chamber by ANSYS FLUENT. I compared analysis results and previous numerical calculation results. And found they are alike. Fourthly, I simplified hyperbaric oxygen chamber model, and use the nozzle model instead of the hyperbaric oxygen chamber model. When the model is in subsonic condition, it shall meet special pressure ratio of inward and outward. Fifthly, this paper analyzes frictional effect on flow in the pipe. Sixthly, the noise sources in hyperbaric oxygen cabin and noise reduction methods are discussed in this paper.