Abstract：Three-dimensional modeling and grid generation was done with Gambit, and 3D single-phase flow field in a pump was calculated by means of multiple reference frame(MRF)method. Renormalization group k-ε two-equation turbulence model(RNG k-ε model)and semi-implicit method for pressure-linked equations(SIMPLEC)algorithm with CFD code-Fluent was adopted. A new structure of labyrinth screw pump was put forward, the effect of ring slots was discussed, and the optimal design parameters were chosen. The results show that pump performance can achieve the best with the ring slot width and depth of 4 mm and 3 mm respectively. Momentum and energy transfer in the pump were studied by analyzing the static pressure, velocity and turbulent kinetic energy distribution, and pump hydraulic performances of the two models were compared. The analytical results indicate that pressurization magnitude and pressurization rate of the new model pump is larger than the original one. The fluid velocity in the rotor is obviously higher than that in the stator, and mass and momentum exchanges coexist on the clearance interface between the rotor and stator. The pressurization rate relates to the turbulent intensity, and the greater turbulent intensity is, the greater pressurization rate can be obtained. Pump performance of the new model is better than the original one, and compared to the original pump, the new model lift head increases by approximately 3.42 m while the hydraulic efficiency increases by 0.85% under the optimum operating condition, and the new model pump efficiency is significantly higher than the original model when the flow rate is greater than that of the optimum operating condition.
李娇娇, 张有忱. 基于Fluent的串接组合式迷宫螺旋泵数值模拟[J]. 排灌机械工程学报, 2014, 32(4): 296-301.
Li Jiaojiao, Zhang Youchen. Numerical simulation of labyrinth screw pump with series combination by Fluent. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(4): 296-301.
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