基于滑速比模型的气液两相流截面含气率计算方法评价

发布时间：2018-12-14 23:50

【摘要】：准确计算气液两相流截面含气率是正确预测两相流压降、合理制订生产方案的关键。滑速比模型在截面含气率的计算中应用最为广泛。为此,对基于滑速比模型的常用计算方法进行系统评价,收集了公开发表的295组截面含气率数据,建立了真实可靠的实验数据集,提出了综合评价体系,引入了灰色关联分析法,对不同方法的计算精度、预测性能、灰色关联度和适用范围进行了全面分析。结果表明,对于垂直上升管气液两相流,在截面含气率全范围内,Smith方法最为推荐,其预测准确性最好,灰色关联度排序第一;各计算方法的最佳适用范围为0.7~1.0;在截面含气率为0.7~1.0,L-M方法的计算精度及预测性能最好。该成果为气液两相流截面含气率计算方法的选择提供了理论依据。
[Abstract]:Accurate calculation of gas-liquid two-phase flow cross section gas holdup is the key to correctly predict two-phase flow pressure drop and rationally formulate production plan. The slip speed ratio model is the most widely used in the calculation of the gas content of the cross section. Therefore, the common calculation methods based on the sliding speed ratio model are systematically evaluated, 295 sets of section gas content data are collected, a real and reliable experimental data set is established, and a comprehensive evaluation system is put forward. The grey relational analysis method is introduced to analyze the calculation accuracy, prediction performance, grey correlation degree and applicable range of different methods. The results show that for the gas-liquid two-phase flow in vertical riser, the Smith method is the most recommended in the whole range of gas content in the section, its prediction accuracy is the best, the grey correlation degree is the first, and the optimum application range of each calculation method is 0.7 ~ 1.0; The calculation accuracy and prediction performance of the method are the best when the gas holdup of the section is 0.7 渭 g / L ~ (-1). The results provide a theoretical basis for the selection of gas holdup calculation method for gas-liquid two-phase flow section.
【作者单位】：天津大学电气与自动化工程学院;
【基金】：国家自然科学基金(50906061) 河北省教育厅青年基金(QN2015216)资助项目
【分类号】：O359

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