Numerical And Experimental Study On Energy Loss Characteristics Of Fixed Fire Water Monitor

At present,fire water monitor is the main equipment of modern fire-fighting.It is developing towards the direction of large flow and long range.Its functions are also increasing.Its function not only concentrates the jet flow,but also increases the spray function.It connects with fire detection and alarm,which has automatic location and aiming function.At the same time,the existing fire water jet technology is difficult to meet the high demand of modern high-rise building fire-fighting.In addition,the fire water monitor performance seriously restricts the efficiency of fire extinguishing in high-rise buildings and causes serious loss of economic property,which becomes the bottleneck problem of the fire water monitor jet technology deep promotion.Therefore,this paper carries out the research on the mechanism of fire water monitor jets and puts forward the improvement of the structure,which not only has important practical significance,but also has more significant market value.This paper mainly focus on the key scientific problems of improving the water jets characteristics and study the fluid dynamics of fire water monitor body structures.This study aims to reduce the energy loss of the fluid in the fire water monitor body and stabilizes the flow field of the fire water monitor.Finally,this study improves the efficiency of fire suppression and reduces the requirement of the pump.The dynamic model is established by extracting the existing fire water monitor structural parameters.Based on the theory of fluid dynamics,the proportion of turbulence,local loss and loss along the flow field in the flow field is analyzed.Aiming at the main energy loss,the feasibility improvement plan of deflector layout is put forward.To clarify the role of deflectors number,position and angle in influencing the stability of the flow field.In order to reduce the number of experimental case,the formulation of the case need to be distinguished major and minor factors.The numerical simulation of the flow field in the fire water monitor design structural is realized by computational fluid dynamics software FlUENT.The optimal design structure is obtained through data analysis of pressure distribution,outlet velocity distribution and streamlines distribution.Then,this paper combines the existing laboratory equipment to establish an experimental structure prototype.The correctness and feasibility of the improved method is verified by comparing the experimental data with theoretical analysis.At the end of the paper,the systematic is presented,which provides the theoretical and technological basis for further theoretical and practical research.Especially,the insufficient of current research in this paper shows clearly the prospective directions of corresponding research work from now on.