Abstract:Gas-liquid two-phase flow of a vortex flow self-priming pump under self-priming condition was simulated by using reynolds time-averaged N-S equations,RNG k-ε turbulent model,and mixer model of multi-phase models in FLUENT.When the channel of impeller and volute were meshed,the size distortion rate was 0.78.The static pressure distribution of the pump from two-phase flow simulation was compared with that from single phase flow,and the relative velocities of the impeller between gas phase and liquid phase were compared.The distribution of gas volume fraction was analyzed.The results show that the static pressure of gas-liquid two-phase is slightly less than that of single-phase when self-priming.The main flow of the pump is the flow of liquid phase with the flow of gas through the phase entrainment effect.Liquid velocity is slightly larger than that of gas.The two channels near the outlet of the pump have obvious gas accumulation with higher gas voids.
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