STUDY ON CHARACTERISTICS OF GAS-LIQUID TWO-PHASE FLOW IN SWIRL ATOMIZING NOZZLE

Abstract

Abstract: By means of experiment and numerical simulation and diethylene glycol as test material, the gas-liquid two-phase flow characteristics in a swirl atomizer nozzle were studied, the flow mechanism in swirl atomizer nozzle was revealed, and the atomizing characteristics in the swirl atomizer nozzle were predicted effectively. The RSM turbulence model and the Euler-Euler multiphase flow model were used in the numerical simulations. The results showed that when the gas/liquid ratio was 600 and the gas flow rate was less than 25 m3/h, the simulation results were in good agreement with the experimental data. Due to the decrease of flowing area, the tangential velocity of diethylene glycol inside the swirl nozzle increased rapidly, and reached a peak value in the throat area. After that, the tangential velocity decreased gradually due to the increase of the flow area. With the increase of gas flux, the speed range of diethylene glycol was farther and farther. When the gas flow rate were 15, 20 and 30 m3/h, the distributing uniformity of diethylene glycol were 27.94%, 26.05% and 33.42%, respectively, showing a trend of decrease first and then increase.

Key words: gas-liquid flow, swirling flow, numerical simulation, unevenness

CLC Number:

References

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