机械排烟控制航母机库火灾烟气运动大涡模拟

航母机库火灾是影响航母安全的重要因素。为研究航母机库火灾防护与控制技术，采用低速气流运动控制方程组和湍流燃烧大涡模拟方法仿真分析机械排烟条件下航母机库油料火灾的蔓延与烟气运动规律。结果表明：针对本算例机库几何尺寸和油池火规模，机械排烟量介于300~600 m3/s，不仅会增高热烟气层高度、降低下层烟气温度，还会降低火源附近的热流密度；当机械排烟量不超过600 m3/s时，采用机械排烟对油池火蔓延的强化影响不显著；机械排烟使热烟气排出温度明显增加，选择风机需要考虑耐温要求。

Large eddy simulation of the control to fire-smoke motion in aircraft garage with a mechanical exhaust

Fires in aircraft garage often pose great hazard to the safety of the aircraft carrier. In order to investigate fire protection and control methods, the control equations of low Mach air flow and the large eddy simulation method of turbulent flows are used to study the spread and the motion of smoke of pool fire in aircraft garage with a mechanical exhaust system. For the researched object, when the exhaust flux is between 300 m3/s and 600 m3/s, the height of heat smoke layer increases, the temperature of cool smoke layer decreases, and the heat flux close to the fire source decreases too. When the exhaust flux is less than 600 m3/s, the mechanical exhaust has little the spread of the pool fire in the garage. The mechanical exhaust elevates markedly the temperature of the exited smoke. Hence the choice of fanner must consider the capabilityof resistanceheat.