Fluid-structure Interaction Simulation And Research On The Characteristics Of Ablation And Erosion Of The Jet Vane Made Of CIT (Copper Infiltrated Tungsten) In The Solid Rocket Motor

The ablation of solid rocket motor jet vane mainly includes Al₂O₃ particle erosion,chemical ablation and melting ablation.This thesis focuses on the study of the internal temperature field,chemical ablation and Al₂O₃ particle erosion ablation in the working process of jet vane.First,in this paper,according to the requirement of the parameters of the nozzle outlet section,the design calculation of the ablation experiment engine for the ground test of the jet vane was completed,and the geometry size of the engine nozzle was determined.Then the commercial software FLUENT was used to simulate the outlet flow of the certain type of solid rocket motor and copper infiltrated tungsten jet vane circle flow field,the steady-state and transient internal temperature field distribution of jet vane and the changing process was calculated by fluid-structure interaction simulation.Secondly,the user defined function?UDF?was inserted in FLUENT to calculate the chemical ablation caused by the reaction between jet vane and CO₂,H₂O in the high-temperature gas.Jet vane profile changes caused by amount of chemical ablation of gas vane was calculated by dynamic mesh in FLUENT.Finally,the discrete phase model?DPM?in FLUENT had been used for simulating the gas and particle two phase flow field,including the single particle diameter and particle diameter,elastic and inelastic collision conditions.The deposition and erosion of the jet vane caused by Al₂O₃ particles was calculated by deposition and erosion model in FLUENT.