Numerical simulation of the effect of water mist nozzle spray angle on fire suppression in semi-enclosed aircraft cabin

Abstract

Abstract: In this paper, the model of aircraft real fire training simulator is built by fire dynamics simulator(FDS) software, and the influence of water mist nozzle spray angle and flow rate of fire nozzle on fire fighting efficiency in semienclosed cabin are studied. The effectiveness of fire suppression, the process of heat and mass transfer are analyzed based on factors such as flame suppression time, gas concentration and temperature differences. The results show that the temperature attenuation rate can be increased by increasing the flow rate of fire fighting water or reducing the nozzle spray angle. In addition, as the nozzle spray angle increases, the O2 concentration in the cabin will decrease and the CO2 fraction will increase. By studying the changes in temperature and gas concentration inside the cabin caused by the nozzle spray angle and fire water flow rate, theoretical support can be provided for firefighters to conduct firefighting training

Key words: fire dynamics, fire training, flame suppression, nozzle spray angle, water spray flow rate, semi-enclosed aircraft cabin

CLC Number:

GAO Jianshu , WANG Qingqiang. Numerical simulation of the effect of water mist nozzle spray angle on fire suppression in semi-enclosed aircraft cabin[J]. Journal of Civil Aviation University of China, 2023, 41(3): 53-58.

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