迎面风对航母甲板火灾影响分析

Analysis of the Head-on Wind’s Effect to Aircraft Carrier Deck Fire

摘要:

航母甲板火灾是影响航母和舰载机安全的重要因素。风速对航母甲板火灾有很大影响。采用低速气流运动控制方程组和湍流燃烧大涡模拟方法,研究了不同迎面风速情况下航母甲板油料火灾的蔓延与烟气运动规律,分析得到甲板上方火灾烟气压强与热流密度随来风速度的变化情况。最后,通过缩比模型和风洞实验数据对计算结果进行了验证。结果表明,航母甲板火灾释热率与风速大小成非单调变化关系,火焰烟羽倾斜角与风速大小成非线性增大关系。研究结果对于航母甲板灭火技术和舰载航空装备安全性分析有较大实用价值。

Abstract:

Fires on the deck of aircraft carrier often pose great hazard to the safety of aircraft carrier and planes. The speedof wind often has remarkable affect the fire on the aircraft carrier deck. The control equations of low Mach flow and thelarge eddy simulation method of turbulent flows were combined together to analyze the spread and motion of the pool firesmoke on the deck. The variations of the pressure, velocity and heat flux of the fire smoke versus different wind speeds onthe deck were simulated. Then experiments were carried out to validate the computed results with a scaled carrier modelin the wind tunnel. Results showed that the heat release rate changed Non-monotonously with the wind speed on deck,and the inclining angles of fire and smoke were non-linear to the wind speed on deck. The results might have some valueto the fire extinguisher design or shipboard aircrafts safety analysis.