CAJ | 학술논문

为提高反渗透海水淡化高压泵轴向力计算的准确性,应用CFD技术对模型泵内部的流动进行数值模拟,得到不同流量下前后泵腔的静压分布.并对模型泵样机进行试验研究,实测出不同流量下前后泵腔在不同半径处的静压值.应用多项式拟合分别绘制出两种方法下的压力分布曲线,对盖板进行面积分,计算轴向力大小.与通过试验数据计算出的结果相比,数值模拟计算出来的轴向力相对误差在9%以内,而经验公式计算的轴向力相对误差为14%,采用数值模拟方法计算轴向力具有更高的精度,对多级离心泵轴向力平衡的研究具有指导意义.
위제고반삼투해수담화고압빙축향력계산적준학성,응용CFD기술대모형빙내부적류동진행수치모의,득도불동류량하전후빙강적정압분포.병대모형빙양궤진행시험연구,실측출불동류량하전후빙강재불동반경처적정압치.응용다항식의합분별회제출량충방법하적압력분포곡선,대개판진행면적분,계산축향력대소.여통과시험수거계산출적결과상비,수치모의계산출래적축향력상대오차재9%이내,이경험공식계산적축향력상대오차위14%,채용수치모의방법계산축향력구유경고적정도,대다급리심빙축향력평형적연구구유지도의의.
In order to improve the axial thrust calculation accuracy of high pressure pump for SWRO, the CFD technology was applied to simulate the 3D flow in the pump chamber of the model pump to acquire the distribution of static pressure in different working conditions. Experiment research on the model pump was made. The value of static pressure in the different radius of the pump chamber was measured in the different working conditions. Polynomial fitting was used to map out the pressure distribution curve of numerical simulation and test results. The value of axial thrust was calculated through impeller shroud surface integral. Compared the value of test with simulation, the relative error of axial thrust is less than 9% which is more accurate than empirical formula value of 14%. The numerical calculation has guiding significance to the axial thrust balance of multistage pump.