Structure Design And Jet Performance Study Of Fire Water Mist Monitor With Low Pressure And Long Range

The fire water monitor is the core equipment of the firefighting industry, with features of long range, large flux and efficiency. With the development of firefighting technology, water mist firefighting has made a full application. Water mist firefighting technology has the characteristics of less water consumption,clean and can be used to eliminating dust. The traditional fire water monitor and water mist system work in a high water pressure environment and cost too much. In this paper, we have designed a fire water mist monitor, which has a good spray performance in lower work pressure. The optimization method in this paper provides reference for improving the performance of fire water monitor.This paper firstly introduced the research background and summarized the current research situation of fire water monitor and its jet performance both at home and abroad, especially in the forming theory and application of the straight jet and water mist. Then the contend and key problems of this paper were confirmed. Secondly, this paper proposed the design requirement of the fire water monitor and confirmed the overall design project. The significance of the design procedure is the design of the flow channel and the nozzle, and by this we proposed the design scheme of duckbilled diffuse nozzle. Then calculate and check the energy loss and the velocity of the nozzle outlet.By introducing the calculation method of CFD and the water jet theory, we provided a theoretical basis for the simulation of the water mist fire monitor. We established the 3D model of the fire water monitor by using Pro/E,simulate the jet performance of the flow channel and nozzle. The simulation shows that the structure satisfies the design requirement. Based on the design result, we optimize the structure of the flow channel and nozzle and install the straighter to improve the internal flow field. Analyze the influence of diffuse angle and the length of duckbilled diffuse nozzle to the water jet and then obtain the best structure parameter. After optimization, the flow rate of the fire water gun and nozzle initial flow field have reached the design requirements.