液相物性对壳侧不互溶双组分两相流流型的影响及通用流型图

在用空气-水,空气-0~＃柴油研究的基础上,用空气与质量浓度为30%的甘油水溶液研究了理想管壳式换热器壳侧两相流型,以期进一步考察液相物性对壳侧两相流动流型的影响。研究表明,液相物性对某些流型的转变有明显影响,而对另外一些流型转变的影响并不明显,提出了考虑液相物性影响的通用流型图。

EFFECTS OF FLUID PROPERTIES ON SHELL -SIDE TWO IMMISCIBLE COMPONENTS TWO-PHASE FLOW PATTERNS AND AN OVERALL FLOW PATTERN MAP

Based on the previous study of air -water and air -0# diesel oil systems, a futher study of the effects of fluid properties on shell -side two -phase flow pattern transitions with air -30 % glycerine water solution system is presented. The experimental results showed that liquid viscosity and surface tension have significant effects on the transition to annular flow and stratified -annular flow, but little effect on the transition to bubble flow. Liquid viscosity has no effect on the transition to intermittent flow, while surface tension has a slight effect. On the basis of physical concepts, an overall flow pattern map is constructed, which based on the data of air-water, air-0# diesel oil and air-30% glycerine water solution two-phase flow systems.