To investigate the motion characteristics of the gas-solid two-phase flow within the nozzle's flow field, a computational model featuring a turbine rotor is established for the Jet Cat P200 turbo-jet engine. An enhanced stochastic orbital model is employed to simulate the trajectory of rarefied-phase flow particles within the engine's flow field. The distribution pattern and variation characteristics of the gas-phase flow field, gas-solid two-phase flow, and flow field particles at varying air intake total pressures were investigated through numerical simulation using CFD soft-ware. The study reveals that the air intake total pressure has a more pronounced impact on the total energy, density, and static pressure of the flow field. With the increasing of the air intake total pressure, the aforementioned variables will increase correspondingly. Compared to the pure gas-phase flow field, the gas-solid two-phase flow field exhibits similar changes under different intake total pressure conditions, and the effect of particles on the flow state of the field can be disregarded. Besides, it's observed that the intake total pressure has a more pronounced effect on the gas-solid two-phase flow of small-diameter particles.
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