【摘要】 借助CFD软件，采用标准k-ε模型对N-S方程进行封闭计算，分析多相增压泵输送清水的水力性能，并进行样机试验测试对比。采用Eulerian模型求解，并分析输送含气率为30%的气液两相流时，增压泵流道、过流部件的速度、压力、气体体积分数及密度等分布规律。计算分析及试验结果表明：针对增压泵内部复杂三维流动的水力性能进行预测的数值模拟分析可靠；气体对增压泵性能影响不利。气液两相流数值计算模拟表明：增压泵进、出口及均化器内部流速分布均匀；均化器上侧气体体积分数较下侧多；增压泵底部气液混合密度较上部大；均化器及叶轮过渡处压力最低；增压泵首级叶轮叶片旋转中心的工作表面的气体体积分数最大，次级叶轮工作表面的气体体积分数降低；增压泵各级导叶叶片工作表面的气体体积分数相对均匀，首级导叶叶片靠近进水边的工作面附近的气体体积分数较高，次级导叶叶片靠近叶片旋转中心的工作面区域气体体积分数较高。更多还原

【Abstract】 The standard k-ε model, with the assistance of CFD software, was used to perform closed calculation of the N-S equation and analyze the hydraulic performance of multiphase booster pump for transporting clear water, and the comparison of prototype test was carried out. The Eulerian model was adopted to seek the solution and analyze the distribution of velocity, pressure, volume fraction and density of flow passage and flow components of booster pump when gas-liquid two-phase flow with 30% gas content was conveyed. The results of calculation analysis and test show that the numerical simulation analysis for forecasting the hydraulic performance of complex 3D flow inside the booster pump is reliable, and the gas exerts an adverse effect on the performance of the booster pump. It is found in the numerical simulation of gas-liquid two-phase flow that the velocity distribution in inlet and outlet of boost pump and in homogenizer is uniform, the volume fraction of gas on the upper side of homogenizer is larger than that on the lower side, the gas-liquid mixing density at the bottom of the booster pump is higher than that at its top, the pressure at the transition of homogenizer and impeller is the lowest, the gas volume fraction on the working surface of the rotating center of the vane in the primary impeller of the booster pump is the largest, while that on the working surface of the secondary impeller is lower, the gas volume fraction on the working surface of guide vanes at all levels of the booster pump is relatively uniform, the gas volume fraction near the working surface of the primary guide vane near the intake edge is larger, and that in the working surface area of the secondary guide vane near the rotating center is higher.更多还原