Abstract
Fire water cannon is the main equipment in fire protection work, which is evolving towards large flow, long distance and high shooting. As an important core component of fire water monitor, the structural design of nozzle plays an important role in jet performance. The Fluent fluid simulation software was used to simulate the internal flow field of the fire nozzle model with different outlet diameters and convergence angles. The average jet velocity and turbulent kinetic energy under different parameters were compared to obtain the optimal size parameters of the fire nozzle. The results show that when the inlet diameter is 100 mm, the inlet pressure is 1.2 MPa, the length of the rectifier section is 95 mm, the outlet diameter is 50 mm, and the convergence angle is 11 °, the jet performance of the fire monitor nozzle is the best. The simulation results can provide reference for the structural design and practical application of fire water monitor nozzle.
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