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本文提出一个新的二维二速度气液两相流含气率模型,同时考虑了两相间存在相对速度及含气率和流速沿流通截面的分布规律这两个影响截面含气率的主要因素。分别对绝热流动和沸腾流动两种情况推导出了截面含气率与容积含气率之间的关系式,并对单组份汽液两相流建立了汽液相速度及含汽率沿截面分布的分布指数与两相流动参数之间的关系。该模型改进了Bankoff变密度模型(Bankoff模型为本文模型当两相间相对速度为零时的特例),具有更大的适用范围,本文就垂直圆管内汽水两相向上流动的情况,确定了模型中的各系数,模型计算结果与试验数据及其它模型比较得到了较好的结果。
This paper presents a new two-dimensional gas-liquid two-phase gas-liquid two-phase flow rate model, taking into account the relative velocity between the two phases and the distribution of gas flow rate and flow rate along the cross-section of the two main factors affecting the gas content of the section . The relationship between gas-bearing ratio and volumetric gas-bearing ratio was deduced respectively for adiabatic flow and boiling flow, and the vapor-liquid velocity and gas-vapor ratio of one-component vapor-liquid two-phase flow were established along the cross section Relationship between distribution index and two-phase flow parameters. The model improves Bankoff variable density model (Bankoff model is the special case when the relative velocity between two phases is zero in this paper), and has a larger scope of application. In this paper, Of the coefficients, the model calculation results and experimental data and other models obtained better results.