Numerical simulation of oxygen supply system's performance parameters characteristic at high altitude
-
摘要: 根据航空供氧系统高空性能的工作原理,利用理论简化结构模型和气体动力学知识,建立了供氧系统部分高空性能参数的数学模型.在Matlab/Simulink系统仿真环境下,对高空部分性能参数进行了数值仿真计算,分析了高空性能中的充氧时间控制以及供氧面罩余压与拉力管内压力的比值特性和各种结构参数对面罩余压大小的影响.通过对仿真计算结果与试验结果的对比分析,表明所建立的数学模型是有效的,采用的仿真计算方法符合计算精度要求,对供氧系统高空性能的设计和改进工作具有一定的参考作用.Abstract: 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.
-
Key words:
- oxygen equipment /
- oxygen supply system /
- oxygen supply performance /
- altitude /
- numerical simulation
-
[1] 肖华军.航空供氧防护装备生理学[M].北京:军事医学科学出版社,2005:174-178,248-251 Xiao Huajun.Physiology of aviation oxygen protective equipment[M].Beijing:Military Medicine Science Press,2005:174-178,248-251 (in Chinese) [2] 刘峰.航空个体防护技术与装备[M].北京:科学出版社.2008:289-300 Liu Feng.Personal protecting of equipment of pilots[M].Beijing:Science Press,2008:172-174 (in Chinese) [3] 肖华军,闫汝泉,刘晓鹏,等.战斗机高飞行员加压供氧面罩高空性能防护评定[J].中国安全科学学报,2003,13(2):1-5 Xiao Huajun,Yan Ruquan,Liu Xiaopeng,et al.Evaluation of oxygen supply performance at high altitude of pressured oxygen mask for fighter pilot[J].China Safety Science Journal,2003,13(2):1-5 (in Chinese) [4] 孙兵,袁修干,赵迎春.供氧系统爆炸减压动态特性地面实验方法研究[J].北京航空航天大学学报,2003,29(6):516-520 Sun Bing,Yuan Xiugan,Zhao Yingchun.Ground experimental modeling of the oxygen supply system’s dynamic performance under explosive decompression[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(6):516-520 (in Chinese) [5] 朱春玲.飞行器环境控制与安全救生[M].北京:北京航空航天大学出版社,2006:422-424 Zhu Chunling.Aircraft environment control and security of life-saving[M].Beijing:Press of Beijing University of Aeronautics and Astronautics,2006:422-424 (in Chinese) [6] 肖华军,蔡传广.Yx-4供氧装备的生理试验评价[J].航空与航天,1990,3:49-52 Xiao Huajun,Cai Chuanguang.The physiological test evaluation of Yx-4 oxygen system[J].Aeronautics and Space Journal,1990,3:49-52 (in Chinese)
点击查看大图
计量
- 文章访问数: 4338
- HTML全文浏览量: 128
- PDF下载量: 1249
- 被引次数: 0