Study on Water Jet Trajectory Model of Fire Monitor Based on Simulation and Experiment

Water is required to reach the ignition location accurately to ensure rapid fire extinguishing in the process of automatic fire suppression. In this paper, a water jet trajectory model was established based on the Moving Particle Semi-implicit (MPS) method, the experimental trajectory data were also collected through the experimental platform system and compared with the simulation trajectory data. Under low initial velocity, the results of simulation matched well with the experimental data while there were large errors under high velocity. It was found that air resistance was the main reason for deviation, the longer flight time caused by the high initial velocity and the bigger stressed area after the water jet break-up were main causes for the greater impact from air resistance. The binary function interpolation compensation method was used for error compensation and the jet angle and initial velocity were selected as error factors. The trajectory model was corrected based on existing simulation and experimental data and verified through unused data. The results showed that the revised trajectory model can accurately predict the position of the jet trajectory and provide data support for automatic fire suppression systems.