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Study on laser transmission characteristics in propeller particle wake

In this paper, we focus on the transmission characteristics of laser in propeller particle wake, the space-time simulation of particle concentration in the wake of propeller disturbance is carried out, according to the variation of particle mass concentration with time and position in laser passageway, and the transmission power model of laser in the wake of propeller particle is established, the model is validated by water-tank experiment; the deviation between theoretical model and experimental results is less than 10%. The results show that, in the region far from the propeller, there is a large scale turbulent structure, and the particle concentration varies sharply; the disturbance of propeller leads to the redistribution of particles, the concentration of particles in the flow field is no longer a stable value, but a transient value changing with time and position.