Simulation optimization design of supercritical CO2 jet mixer nozzle
A supercritical CO2 jet mixer is proposed and a jet model is established,and the nozzle structure and jet working conditions are optimized through CFD simulation to ultimately determine the optimal mixing effect between the coating and supercritical CO2.The results of the surface response analysis method indicate that the influence of various factors on the turbulent kinetic energy of the broken section of the jet is in descending order:pressure,temperature,injection cone angle.The turbulent kinetic energy first decreases and then increases with the increase of pressure,increases with the increase of temperature,and increases first and then decreases with the increase of the injection cone angle.Combined with the actual spraying conditions,it is believed that under the condition of 10 MPa and 60℃,the supercritical CO2 ejected from the 18° nozzle cone angle can generate turbulent kinetic energy greater than 3 000 m2/s2 in the jet crushing section.This research conclusion can provide theoretical guidance for the optimal design of supercritical CO2 jet mixer.
supercritical CO2 sprayingjet mixerjet turbulent kinetic energysurface response analysis
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