Study on wind-resistance characteristics of jet motion control in compressed air foam system
The compressed air foam fire-extinguishing system has developed rapidly in recent years,and the control of the system's spray movement is one of the important factors that affect its ability to effectively extinguish fire.Currently,since the wind-resistance research is insufficient on the jet deviation of the compressed air foam fire monitor with the high wind speed,the fire monitor cannot ensure accurate fire extinguishing.In this article,the jet movement model is set up for the compressed air foam fire monitor,with the natural wind conditions taken into consideration.In combination with the gas-liquid ratio adjustment control of the compressed air foam fire-extinguishing system,the wind-resistance control system is designed,which can adaptively and dynamically adjust the fire monitor's horizontal depression angle according to the external wind speed and direction,in order to improve the system's ability of wind resistance.Simulink is used to set up the jet-movement model,and the system's wind-re-sistance ability is subject to the jet experiment under the natural wind conditions.It is shown that the system can conduct the wind-resistance actions according to the wind speed and direction,so that the fire monitor's jet drop points can get into the desig-nated area,which proves that the fire monitor's jet movement model is accurate and the control system has great wind-resistance ability.This study provides a feasible wind-resistance scheme for the compressed air foam fire monitor to effectively extinguish fire in severe wind conditions.
compressed air foam systemself-adaptionjet motion modelwind-resistance characteristic