Research of simplified protection scheme for pilots flying below 15.0 km
10.3760/cma.j.cn113854-20210412-00064
- VernacularTitle:飞行员15.0 km以下高空供氧防护简化方案研究
- Author:
Lei TU
1
;
Dongqing WEN
;
Zhao GU
;
Guiyou WANG
;
Lihua YU
;
Weiru SHI
;
Yan ZHANG
;
Ying LIU
;
Xiaopeng LIU
Author Information
1. 空军特色医学中心高空生理研究室，北京 100142
- Publication Type:Journal Article
- Keywords:
Oxygen;
Anoxia;
Pressurized oxygen supply;
Oxygen supply system;
Altitude compensatory equipment
- From:
Chinese Journal of Aerospace Medicine
2022;33(2):88-93
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the simplified oxygen supply protection scheme below 15.0 km, and to evaluate its protection performance through tests.Methods:The parameter of YX-5 oxygen system was modified, by reducing its total oxygen supply pressure and closing a large number of oxygen supply mechanisms, and compensatory suit was cancelled. A dummy and 4 volunteers with helmet and oxygen mask using modified YX-5 oxygen system underwent 5 tests in hypobaric chamber, included ① normal oxygen supply performance test at 0-10.0 km; ② pure oxygen supply performance test at 0-10.0 km; ③ positive pressure supplying oxygen performance test at 13.0, 15.0, 16.0 km; ④ impact test of pressured oxygen supply; ⑤ pressured oxygen supplying performance physiological test at 15.0 km.Results:Under the normal oxygen supply, the oxygen pressure of modified YX-5 oxygen system below 12.0 km was >21.0 kPa. When high-altitude pressurized oxygen supply was used, the oxygen pressure was >15.8 kPa at 12.0-15.0 km. Inspiration resistance of modified YX-5 oxygen system was <0.34 kPa when the dummy′s respiration ventilation rate was 20 L/min. The impact pressure of mask was 1.25 kPa when pressured oxygen supply switched on but without compensatory suit connected to modified YX-5 oxygen system. Four volunteers completed the human physiological test up to 15.0 km high-altitude pressurized oxygen supply to verify the protective performance of the scheme, and they had no adverse physiological reactions after the test.Conclusions:The simplified protection scheme can provide protection against hypoxia for pilots at 0-15.0 km altitude.
