基于非均质性流动过程量化冰浆流动管道压降  

Pressure Drop Quantification of Heterogeneous Ice Slurry Pipe Flow Processes

作　　者：王继红[1] 王树刚[1] 张腾飞[1] 李维仲[2] 

机构地区：[1]大连理工大学土木学院,辽宁大连116024 [2]大连理工大学能动学院,辽宁大连116024

出　　处：《高校化学工程学报》2015年第5期1065-1072,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：中央高校基本科研业务费专项资金项目;中国博士后科学基金资助项目(2014M560209)

摘　　要：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。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%.

关 键 词：冰浆 非均质性流动 管道压降 数学建模 

分 类 号：O359[理学—流体力学]