The working process of aviation oxygen supply system(OSS)at high altitude was described, and the mathematic model for the performance parameters characteristics of OSS was built, combining with the principle of dynamics of gas flow. By the numerical simulation with Matlab/Simulink and the theoretical analysis, the performance parameters characteristics of OSS at high altitude were achieved. A detailed analysis was conducted for the characteristics of oxygen inflating time and ratio of pressure, and then the major parameters affecting the press in oxygen mask were found. The results are in good agreement with those measured in the experiments, which shows that the analytical model is correct and the simulation method is in accordance with the precision requirements. The study and its conclusions are useful for the design to the characteristics of OSS at high altitude and the system analyses.
Yu Zhongjun, Zhao Jingquan.Numerical simulation of oxygen supply system's performance parameters characteristic at high altitude[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(8): 918-921
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