CAJ | 학술논문

为了深入了解离心泵内部盐析两相流场，利用FL U EN T对离心泵内部盐析流场进行了数值模拟，获得了不同温度下离心泵内部盐析流场的变化规律。研究结果表明：由于盐析过程中温度的降低，溶液过饱和度增加致使晶体颗粒逐渐长大且数密度增加，从而使得晶体颗粒对液相流场产生影响增大，溶液温度为34℃时液相的相对速度略小于40℃时液相的相对速度；在叶轮进口处，晶体颗粒体积浓度分布比较均匀，晶体颗粒在沿着流道方向运动的同时，由于离心力与惯性的影响，偏向叶轮压力面，使得压力面附近的晶体颗粒的浓度较高，在同一流道压力面上，流道中间处的颗粒相对较多，这由于压力面中间附近晶体颗粒的相对运动速度较小，盐析晶体颗粒在该区域受到溶液的剪切力较其他区域小，有利于晶体颗粒的生长和聚并。
위료심입료해리심빙내부염석량상류장，이용FL U EN T대리심빙내부염석류장진행료수치모의，획득료불동온도하리심빙내부염석류장적변화규률。연구결과표명：유우염석과정중온도적강저，용액과포화도증가치사정체과립축점장대차수밀도증가，종이사득정체과립대액상류장산생영향증대，용액온도위34℃시액상적상대속도략소우40℃시액상적상대속도；재협륜진구처，정체과립체적농도분포비교균균，정체과립재연착류도방향운동적동시，유우리심력여관성적영향，편향협륜압력면，사득압력면부근적정체과립적농도교고，재동일류도압력면상，류도중간처적과립상대교다，저유우압력면중간부근정체과립적상대운동속도교소，염석정체과립재해구역수도용액적전절력교기타구역소，유리우정체과립적생장화취병。
Fluent was applied to calculate the salt-out flow in the centrifugal pump ,the flow field at different temperature conditions were obtained .During the temperature reduction ,the super saturation of the solution increases ,the number of particles increases , and also the particles grow bigger ,which affects the liquid flow obviously .The liquid velocity at 34 ℃ is slightly smaller than that of 40 ℃ .At the inlet of the impeller ,the distribution of the particle is uniform ,the particle moves along the flow passage .Affected by the centrifugal and inertial force ,the particles move to the pressure side of the blade ,at this area ,the liquid velocity is much smaller than other area ,which is helpful to the particle growth and coalescence .