论文部分内容阅读
本文对前人的工作作了综述。作者采用分相动量模型对于气液双相流体通过锐缘孔板时的流动特性作了理论分析。根据双相流动量微分方程在假定流体为不可压缩的条件下,导出了计入各相流量系数差异影响时双相流通锐缘孔板的分相模型基本方程。常用的Chisholm关系式和Murdock关系式是作者得出的这一关系式的特例。因此,作者得到的关系式更具有普遍意义。此外,根据作者的推导,在不考虑相间切应力的条件下,由不同的途径同样得到了Chisholm关系式。由此,对于一般认为Chisholm式的特点是计入相间切应力这一观点,作者提出了自己的看法。本文对于不同孔板截面比m值对试验结果的影响也进行了研究。作者认为m值的影响主要是压缩性的影响。当在高质量流速、高x、小m的情况下,流体压缩性的影响是不容忽略的,在这一方面试验结果和作者的理论分析是完全一致的。
This article reviews previous work. The authors used a phase-separation momentum model to analyze the flow behavior of a gas-liquid two-phase fluid passing through a sharp-edged orifice plate. According to the two-phase flow differential equation, assuming that the fluid is incompressible, the basic equation of phase separation model of dual-phase flow through sharp-edged orifice plate is deduced under the influence of the difference of flow coefficient of each phase. The commonly used Chisholm relation and Murdock relation are the special cases of this relation that the author draws. Therefore, the relationship obtained by the author is more universal. In addition, according to the author’s deduction, Chisholm’s relation is also obtained by different ways regardless of the interlaminar shear stress. Thus, the author puts forward his own opinion on the general view that Chisholm’s type is characterized by inter-phase shear stress. In this paper, the effect of different orifice ratio m on the test results has also been studied. The author thinks that the influence of m value is mainly the compressibility. The effect of fluid compressibility is not negligible at high mass velocities, high x, and low m, and the experimental results are completely consistent with the author’s theoretical analysis in this respect.