Research Of The Trajectory Of Fire-fighting Monitor's Jet

Following the economy increase and social development, more and more large space building, large scale oil jetties and oil storage tank farms are built, which raise new requirements for fire-fighting monitor's research. At present, in China the study of fire-fighting monitor's trajectory is in the stage of test research, lack of systemic theoretic research. This thesis focuses on the fire-fighting monitor's trajectory. Theoretical analysis the trajectory of ideal condition and actual fire-fighting monitor's jet, establish the simulated model with the software of Simulink, and then inspect the model's result with test date to check its veracity, at last analysis and solve some problems about jet's performance with using the model.1. Use the breakup theory to research the problems of fire-fighting monitor's jet's structure and stability,. At first, anaylisis the jet's breakup type and related conception and breakup theory, and then descript the fire-fighting monitor's breakup procedure with K-H theory and R-T theory.2. There are three types of factors for fire-fighting monitor's jet, input energy, internal structure parameters and environment factors. Discuss the problems about idea contion firefighting monitor jet's trajectory firstly, the ideal condition means that the jet is in still gas and only effected by input energy. Give the differential equation of the jet's trajectory through force analysis, and then research the problems of initial condition and air force.Because the differential equation of the jet's trajectory is hard to be solved directly, we build the simulated model of ideal condition fire-fighting monitor's jet's trajectory with the software of Siumlink.3. Study the factor of internal structure parameters, namely the problem of the actual fire-fighting monitor's jet's trajectory. Analysis the concepts and reasons of the factors, analysis the structure of monitor and do optimization test to get the most optimized structure, and then analysis the fluid field using the software of Fluent to get the efficiency of axis velocity vector. Take the efficiency the velocity model of the simulate model of ideal condition jet's trajectory, and analysis and establish the jet's cross-sectional area model using the multivariate linear regression model, the new model is actual fire-fighting monitor's jet's trajectory simulated model. At last validate the model's veracity through comparing the results of the model with that of test.4. Research some problems about fire-fighting monitor's jet with using the simulated model. At first, research the influence of the three main parameters (pressure, flow and angle), the method is setting one parameter as constant and the other two parameters as variables to review the change of horizontal range of fire-fighting monitor's jet's trajectory. The second, research the influence of environment factors (wind) through theory analysis and changing the jet's trajectory simulated model. At last, introduce the concept of effective diameter of putting out of fire. Analysis the rationality and necessity, and advance the research method.