The aim of this study is to execute the fluid dynamics simulation of high\nspeed jet under distinct input velocities (i.e. , 114.1, 142.4, 165.6, 186.2 and\n286.9 m/s). In particular, this study focuses on the impact velocity and velocity\nof two-phase flow (gas-liquid). Firstly, the three-dimensional geometric\nmodel of high speed jet is established on the basis of the actual operational\nconditions. Next, the unstructured grids of high speed jet are generated by\nmeans of ANSYS Fluent. Finally, the fluid dynamics simulation of high speed\njet is implemented by using Fluent. The simulation results show that when\nthe input velocity of the liquid increases, the impact velocity declines sharply,\nwhile according to the Bonuli law of conservation of energy, the impact effect\non the device shows exponential growth with increasing input velocity. In addition,\nthe relationship between the impact velocity and the input velocity\nand the relationship between the impact effect on the device and the input\nvelocity are achieved, which could provide certain theoretical guidance for\npredicting the working pressure and velocity of high speed jet based on real\ninput velocity.
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