摘要
气体—非牛顿液体两相流动中的段塞流是常见而又十分复杂的流动型态。世界各国过去对水平管中气体—牛顿液体的段塞流做过不少研究,但对气体—非牛顿液体的段塞流研究甚少。在借鉴前人研究成果及理论分析的基础上,经过大量的实验观察,结合非牛顿液体的特征,在假设①整个管路由相同的流动单元L_u组成;②一个曲型的L_u单元中含有液柱L_s、气柱L_f和液膜三部分,液柱和液膜中均有气体;③液柱流速和液膜流速的“铲起”和“泄落”速率相同,液柱长度为定值;④液膜被铲起后在液柱前面形成一个旋涡区L_m的前提下,提出了水平管中气体—非牛顿液体段塞流的水力模型,求出液柱流速、铲起速率、液膜流速、液柱的频率及长度、三种持液率间的关系式,最后解出了压降计算式,并将计算值与实验数据相比,理论分析与实验结果基本吻合。
Plug flow is a common and complicated flow state in gas--non-Newtonian/ two phase flow liquid. Many researches have ever been performed in the world on plug flow of gas--Newtonian liquid. But few researches have been done on that of gas--Non-Newtonian liquid. Through lots of experiments and observation and based on the characteristics of non-Newtonian liquid, the writers have worked out the following: the hydraulic module for the plug flow in horizontal piplines, the flow rate of liquid colume, shovel rate,liquid film flow rate, the frequency and length of liquid colume,the relational expression between the three liquid holdups before finding the pressure drop calculation equation and have the-calculated value compared with the experiment data,all of which are obtained on the presmise of such sopposed factors as:1. The whole pipeline is composed of the flowing L. units similar to each other;2. A typical L.unit contains three parts, which are liquid Colume-Ls, gas colume Lf and liquid film. There is gas both in liquid colume and in liquid film;3. The the shovel and falling speeds of the flow rates of liquid and film are the same. The colume length is of the fixed value;4. A wirling area is formed before the liquid colume after the film being shovelled.
出处
《油气储运》
CAS
北大核心
1994年第2期15-18,共4页
Oil & Gas Storage and Transportation
关键词
气体
非牛顿液体
段塞流
压降
管道
non-Newtonian liquid, plug flow , two phase flow, pressure drop, calculating equation
