摘要
基于混合物多相流模型、RNGk-ε湍流模型和SIMPLEC算法,应用CFD软件Fluent对迷宫螺旋泵内气液两相流场进行数值模拟并通过试验进行验证.通过分析流道内不同截面上的压力、速度以及含气率分布,研究泵内气液两相流场的流动情况.模拟结果表明,压力分布从进口到出口沿螺旋槽逐渐升高,增压效果明显,速度分布在环形腔的外侧比在内侧稍大,螺旋部分含气率分布比较均匀,进出口处出现含气率分布不均匀现象,局部含气率较高,在此要防止气堵现象的发生.试验结果表明所采用的计算模型基本符合泵内部流动的实际情况,这说明模拟结果一定程度上揭示了迷宫螺旋泵内部气液两相流场的流动规律,可为迷宫螺旋泵气液两相流研究提供理论依据,试验结果同时表明迷宫螺旋泵进行气液混输时具有良好的曝气效果,可作为传统曝气设备的替代产品.
The flow field of gas-liquid two-phase in a labyrinth screw pump was simulated by CFD software Fluent based on the mixture model of multi-phase,RNG k-ε turbulent model and SIMPLEC algorithm.The experiment was carried out to examine the simulation results.The two-phase flow field in the pump was studied by analyzing pressure,velocity and gas void distributions.The simulation results showed that the pressure in screw groove grew continueously,velocity of outside regions was bigger than that of inside,the gas void distribution in screw groove was uniformly.But higher gas void regions appeared at inlet and outlet area and blocking phenomenon easily occured.The experimental results prove the validity of the numerical calculation model.To some extent,the simulation results can reveal the evolution of the two-phase flow,and provide references for researching the principle of the two-phase flow field in pumps.The experimental results also prove that the pump has a good aeration effect.So the labyrinth screw pump can be used to replace traditional aerators.
出处
《排灌机械工程学报》
EI
2010年第6期492-496,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
中国石油化工集团公司技术开发项目(309040)
关键词
迷宫螺旋泵
气液两相流
数值模拟
含气率
曝气
labyrinth screw pump
gas-liquid two-phase flow
numerical simulation
gas void
aeration
