| Aviation oxygen supply is a necessary means to ensure the pilot is safe at the environment ofhigh altitude and hypobaric hypoxia. Oxygen regulator is one of the key links in oxygen equipmentprotection technology. This paper has mainly researched on oxygen regulator of the oxygen maskcombined with the physiological requirements of aviation oxygen. Based on establishing models ofthe oxygen regulator, the paper has done a calculation of the fluid filed by using the method ofnumerical simulation, and finally has got the flow rate characteristics of it.In the process of numerical simulation, the paper firstly has simplified the suction vale of theoxygen regulator, and established geometric model and mathematic model of it; then the paper has setup the boundary conditions followed by selecting calculation area, and used ICEM to do a griddivision of the area; finally the paper has selected the corresponding turbulence model, calculated theflow field by FLUENT, and done a analysis and summaries to the calculated results.The calculation results show that: in a cycle within the suction, the flow rate curve changesapproximately close to sinusoidal variation, when the valve opening degree is small, flow gradient islarge, when the valve opening degree reaches a certain value, the flow is no longer increase with thevalve opening degree changes. And at the inlet and outlet of the vale flow field, there have been alarge pressure variation, which means that the inspiratory resistance is mostly formed here, in order toreduce the inspiratory resistance of the oxygen regulator, except for changing the structure of thepulmonary type, changing the structure of here also works well to make it easily for gas flowing. Thispaper can provide some reference to optimize the performance and structure of the oxygen regulator. |
