In this paper,geometric models of throttling parts with three different structures are established based on the characteris-tics of pressure proportioner.The numerical simulation of the pro-portioner with different throttling parts is carried out by using Flu-ent software to analyze the pressure distribution and velocity dis-tribution under design conditions.And through experiments,the mixing ratio and pressure loss of the three proportioner with differ-ent structures are studied.The influence of the structure character-istics of different pressure proportioner on the main performance parameters are analyzed.In the comparison of experimental and simulation results,the relative error of pressure loss under high flow rate is within±10%,which provides a theoretical reference for the design calculation,selection and structure optimization of the proportional mixer.
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