CAJ | 학술논문

以水平管道内冰浆非均质性等温流动过程为研究对象，结合欧拉-欧拉模型，引入颗粒浓度扩散方程和非均质流动曲面方程，建立适用工程设计阶段冰浆非均质性流动管道压降“准二维”模型。结果表明，“准二维”模型含有冰浆流动时液相载流体相、固相冰粒子相和固液两相间的相互作用各分项，能够分项量化出各流体相的阻力份额。当流速较低时，液体相和冰粒子相所占的压降份额将随流速与冰粒子浓度变化呈现出反向变化趋势；随着流速升高，各流体相所占的压降份额仅对冰粒子的浓度变化具有显著的响应。通过比较不同工况下冰浆流动的管道压降，“准二维”模型的预测值与实验值间的相对误差基本可控制在±10%内。同时，“准二维”模型体现出明显的效率优势。
이수평관도내빙장비균질성등온류동과정위연구대상，결합구랍-구랍모형，인입과립농도확산방정화비균질류동곡면방정，건립괄용공정설계계단빙장비균질성류동관도압강“준이유”모형。결과표명，“준이유”모형함유빙장류동시액상재류체상、고상빙입자상화고액량상간적상호작용각분항，능구분항양화출각류체상적조력빈액。당류속교저시，액체상화빙입자상소점적압강빈액장수류속여빙입자농도변화정현출반향변화추세；수착류속승고，각류체상소점적압강빈액부대빙입자적농도변화구유현저적향응。통과비교불동공황하빙장류동적관도압강，“준이유”모형적예측치여실험치간적상대오차기본가공제재±10%내。동시，“준이유”모형체현출명현적효솔우세。
A quasi-two-dimensional model was proposed to describe the pressure drop of heterogeneous ice slurry flow without considering ice melting processes. A cubic velocity surface equation and a concentration diffusion equation were introduced in the proposed model which was derived from a multiphase flow computational fluid dynamics (CFD) model. The results reveal that the proposed model is composed of three items that represent pressure drop caused by liquid phase, solid phase and phase interaction, respectively. Therefore, the proposed model is able to quantify the pressure drop of each fluid phase. Under low flow rate regions, the pressure drop caused by liquid phase and ice particle phase shows reverse relationship with flow rate and ice particle concentration. With the increasing of flow rate, the ice particle concentration becomes a main factor affecting the distribution of phase pressure drop. Comparing to experimental data, the proposed model presents excellent efficiency and accuracy with relative errors limit of ±10%.