Integrated Aircraft Fuel Tank Fire and Explosion Protection Systems - Phase 1 and 2

1975 ◽  
Author(s):  
Q. C. Malmberg
2021 ◽  
Vol 11 (16) ◽  
pp. 7698
Author(s):  
Yuhao Wei ◽  
Yang Pei ◽  
Yuxue Ge

Ullage washing is an efficient inerting method to keep the ullage oxygen concentration under the safe value, thus reducing the hazard and loss of fire and explosion of aircraft fuel tanks. In the conventional model of ullage washing, the initial derivatives of oxygen concentration that are used to solve the differential equations are selected subjectively by researchers and the empirical select influences the accuracy of the result. Therefore, this paper proposes an analytical algorithm that can calculate the ullage oxygen concentration without selecting any initial derivative value. The algorithm is based on a fuel tank ullage washing model regarding various inerting stages. It has been experimentally validated with an average relative error of 5.781%. Moreover, sensitive analyses carried out on the proposed model show that ground-based inerting can effectively reduce the ullage oxygen, concentration in the climb phase. Increasing 5 min of pre-takeoff inerting duration can shorten the time of decreasing the ullage oxygen concentration to 9% after takeoff by 2.1 min.


Author(s):  
W. Q. Brookley

Development of an aircraft fuel tank nitrogen system to suppress fire and explosion has been underway for several years. As work progressed it was learned that such a system could also reduce contamination in the fuels. Reduction of contamination will reduce fuel system component malfunctioning, improve aircraft performance, and possibly eliminate the need for fuel additives and exotic fuels.


2012 ◽  
Vol 40 (1) ◽  
pp. 103420
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
M. N. Hooper ◽  
A. R. Hutchinson ◽  
J. G. Broughton ◽  
...  
Keyword(s):  
Test Rig ◽  

2021 ◽  
pp. 103164
Author(s):  
Xuanming Cao ◽  
Xiaoxi Gong ◽  
Qian Xie ◽  
Jiayi Huang ◽  
Yabin Xu ◽  
...  

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