化工进展2024，Vol.43Issue(2)：609-618,10.DOI:10.16085/j.issn.1000-6613.2023-1071
基于Kelvin-Helmholtz不稳定性和界面剪切作用的扰动波高预测模型
Disturbance wave height prediction model based on Kelvin-Helmholtz instability and interfacial shear
摘要
Abstract
Annular mist flow widely exists in natural gas and other industrial environments,in-depth exploration of the characteristics of disturbance waves is of significant importance for understanding the evolutionary patterns of annular mist flow.Experiments on gas-liquid two-phase flows were conducted in a vertical pipeline with an inner diameter of 15mm at different operating conditions.The liquid film thickness and droplet entrainment ratio were measured using a conductive ring sensor and a liquid film collection system respectively.The disturbance wave height data were extracted from the temporal signals of conductive ring sensor by using a dual-threshold method.The disturbance wave height and entrainment ratio with changes in gas-liquid flow rates and working pressure were investigated.It was found that both of them increased with increasing liquid flow rate,while they decreased with increasing gas phase flow rate and working pressure,indicating a close correlation between them.Then the scale parameters affecting the disturbance wave height were analyzed,and a disturbance wave height prediction model based on Kelvin-Helmholtz instability and interfacial shear was established.The model exhibited a relative root mean square error(rRMSE)of 4.05%,with 98.7%of data points falling within a±10%error range,demonstrating good fitting performance.Finally,a comparison was made between the proposed model and existing disturbance wave height correlations,both prediction accuracy and scalability have been greatly improved.关键词
气液两相流/液膜/Kelvin-Helmholtz不稳定性/界面剪切作用/扰动波高Key words
gas-liquid flow/liquid film/Kelvin-Helmholtz instability/interfacial shear/disturbance wave height分类
信息技术与安全科学引用本文复制引用
孙宏军,李腾,李金霞,丁红兵..基于Kelvin-Helmholtz不稳定性和界面剪切作用的扰动波高预测模型[J].化工进展,2024,43(2):609-618,10.基金项目
国家自然科学基金(62373270,61873184,52276159) （62373270,61873184,52276159）
天津市教委科研计划(2022KJ065). （2022KJ065）
