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A prediction model for the critical gas velocity and pressure gradient of continuous liquid-carrying in inclined pipes
AIChE Journal ( IF 3.7 ) Pub Date : 2021-05-21 , DOI: 10.1002/aic.17336
Wu‐Jie Wang 1 , Guo‐Min Cui 1 , Yuan Xiao 1 , Jia‐Xing Chen 1
Affiliation  

A generic model for the prediction of critical gas velocity and pressure gradient in slightly inclined pipes (β ≤ 6°) is presented in this article. The gas–liquid configuration was determined based on the minimum energy principle and consideration of wettability and surface tension. A visualization experiment was conducted to obtain the critical gas velocity and the critical pressure gradient of a gas–liquid flow through the 40 and 60-mm pipe diameter. The theoretical study shows that the configuration is close to a convex interface shape at the critical conditions, which is in accord with the experimental phenomenon. Experimental study shows interfacial waves are the main cause of increased interfacial friction factor and a linear functional relationship between the inclination angle and the flow correction factor f(β). The results demonstrate that the new model is capable of providing satisfactory prediction results for the critical gas velocity, pressure drop, and liquid holdup.

中文翻译:

斜管连续载液临界气速和压力梯度预测模型

用于预测略微倾斜管道中临界气体速度和压力梯度的通用模型 ( β ≤ 6°) 在本文中介绍。基于最小能量原理并考虑润湿性和表面张力来确定气液构型。进行可视化实验以获得通过 40 和 60 毫米管径的气液流动的临界气体速度和临界压力梯度。理论研究表明,在临界条件下,构型接近凸界面形状,与实验现象一致。实验研究表明,界面波是界面摩擦系数增加的主要原因,倾角与流动修正系数f ( β)。结果表明,新模型能够为临界气体速度、压降和持液率提供令人满意的预测结果。
更新日期:2021-05-21
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