流体力学实验与测量
流體力學實驗與測量
류체역학실험여측량
EXPERIMENTS AND MEASUREMENTS IN FLUID MECHANICS
2000年
4期
46-50
,共5页
乳化液%分散相液滴%力学行为%油水分离%剪切流场
乳化液%分散相液滴%力學行為%油水分離%剪切流場
유화액%분산상액적%역학행위%유수분리%전절류장
emulsion%efficiency of separation%mechanical behaviors%oil-water separation shear flow
油水分离机械中油水乳状液分散相液滴的力学行为直接影响到分离机械的分离效率。笔者通过在旋转剪切场中油水乳化液稳定特性的实验研究，对剪切对油水分离效率影响进行了初步探索。实验发现不同剪切强度对乳化液分离效率会产生正面或负面的影响。通过分散相液滴界面膜的受力及其在剪力作用下的变形分析，初步解释了剪切场和交变剪切场中乳化液分散相液滴的运动聚集规律，提出可以由其分散相液滴变形的长短径比的特定取值来判断相应的剪切强度对其沉降分离特性的影响。
油水分離機械中油水乳狀液分散相液滴的力學行為直接影響到分離機械的分離效率。筆者通過在鏇轉剪切場中油水乳化液穩定特性的實驗研究，對剪切對油水分離效率影響進行瞭初步探索。實驗髮現不同剪切彊度對乳化液分離效率會產生正麵或負麵的影響。通過分散相液滴界麵膜的受力及其在剪力作用下的變形分析，初步解釋瞭剪切場和交變剪切場中乳化液分散相液滴的運動聚集規律，提齣可以由其分散相液滴變形的長短徑比的特定取值來判斷相應的剪切彊度對其沉降分離特性的影響。
유수분리궤계중유수유상액분산상액적적역학행위직접영향도분리궤계적분리효솔。필자통과재선전전절장중유수유화액은정특성적실험연구，대전절대유수분리효솔영향진행료초보탐색。실험발현불동전절강도대유화액분리효솔회산생정면혹부면적영향。통과분산상액적계면막적수력급기재전력작용하적변형분석，초보해석료전절장화교변전절장중유화액분산상액적적운동취집규률，제출가이유기분산상액적변형적장단경비적특정취치래판단상응적전절강도대기침강분리특성적영향。
Oil-water separation is the main subject in many oil fields in the world. The mechanical behaviors and features of discrete phase droplet in oil-water emulsion are close related to separator efficiency. In this paper through the shear flow induced by rotation of two concentric barrels, the effect of shear stress on separation of oil-water emulsions was investigated experimentally. Some regulations of discrete droplet movement and agglomeration were discovered. Meanwhile, a criterion to estimate the effect of a shear flow on separation efficiency of emulsions by the distortions of droplet applied by the shear stress was proposed.This project provides not only a guide to the subsequent research on the mechanical behaviors and features of separated phase droplet in oil-water emulsion,but also a new way to develop oil-water separation facilities of high-efficiency.
