哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2014年
10期
1301-1306
,共6页
王洋%阎昌琪%孙立成%闫超星%刘国强
王洋%閻昌琪%孫立成%閆超星%劉國彊
왕양%염창기%손립성%염초성%류국강
矩形通道%弹状流%液膜%泰勒气泡长度
矩形通道%彈狀流%液膜%泰勒氣泡長度
구형통도%탄상류%액막%태륵기포장도
rectangular channel%slug flow%liquid film%Taylor bubble
为了深入探究矩形通道内弹状流机理，利用高速摄像系统，对矩形通道（3．25 mm×40 mm）内弹状流进行了可视化研究。实验中发现，泰勒气泡长度LT随分气相雷诺数ReG近似线性增长，但随着分液相雷诺数ReL增加，LT的增长速率减小。液膜脱离泰勒气泡时厚度δf随ReG增加而减小并趋于稳定，随ReL增加而增大。δf主要由ReG、ReL和LT决定；LT≥150 mm时，δf趋于稳定。液膜脱离泰勒气泡时速度Vf随ReL增加而增大。在低ReL时，Vf方向向下并随ReG增加而减小；当ReL≥9102时，液膜始终向上运动，Vf随ReG变化较小，主要受ReL影响。通过数据回归分别得到了LT、δf和液膜相对脱离速度Vfr计算关联式，其与实验数据符合相对较好。
為瞭深入探究矩形通道內彈狀流機理，利用高速攝像繫統，對矩形通道（3．25 mm×40 mm）內彈狀流進行瞭可視化研究。實驗中髮現，泰勒氣泡長度LT隨分氣相雷諾數ReG近似線性增長，但隨著分液相雷諾數ReL增加，LT的增長速率減小。液膜脫離泰勒氣泡時厚度δf隨ReG增加而減小併趨于穩定，隨ReL增加而增大。δf主要由ReG、ReL和LT決定；LT≥150 mm時，δf趨于穩定。液膜脫離泰勒氣泡時速度Vf隨ReL增加而增大。在低ReL時，Vf方嚮嚮下併隨ReG增加而減小；噹ReL≥9102時，液膜始終嚮上運動，Vf隨ReG變化較小，主要受ReL影響。通過數據迴歸分彆得到瞭LT、δf和液膜相對脫離速度Vfr計算關聯式，其與實驗數據符閤相對較好。
위료심입탐구구형통도내탄상류궤리，이용고속섭상계통，대구형통도（3．25 mm×40 mm）내탄상류진행료가시화연구。실험중발현，태륵기포장도LT수분기상뢰낙수ReG근사선성증장，단수착분액상뢰낙수ReL증가，LT적증장속솔감소。액막탈리태륵기포시후도δf수ReG증가이감소병추우은정，수ReL증가이증대。δf주요유ReG、ReL화LT결정；LT≥150 mm시，δf추우은정。액막탈리태륵기포시속도Vf수ReL증가이증대。재저ReL시，Vf방향향하병수ReG증가이감소；당ReL≥9102시，액막시종향상운동，Vf수ReG변화교소，주요수ReL영향。통과수거회귀분별득도료LT、δf화액막상대탈리속도Vfr계산관련식，기여실험수거부합상대교호。
In order to investigate the mechanism of slug flow, visualized experiments were conducted by using a high speed video camera system in a rectangular channel (3.25 mm×40 mm). It was found that the Taylor bubble length LT increases almost linearly with the increasing of gas phase Reynolds numbers ReG, while its increase rate decrea?ses with the increasing of liquid phase Reynolds numbers ReL . The liquid film separating thicknessδf decreases with increasing of ReGand approximates to constant when it varies inversely with ReL. The ReG and ReLas well as the LT have significant influence onδf. For LT≥150 mm, theδf approximates to constant. The liquid film separating veloc?ity Vf increases with increasing of ReL. For low ReL, Vf is downward and decreases with increasing of ReG. When ReL≥9 102, the film always moves upward, the ReG has weak effect on Vf and Vf is mainly determined by ReL. The computational correlations of LT,δf and liquid film separating velocity relative to Taylor bubble Vfr are proposed ac?cording to data fitting, respectively. The correlations showed relatively good agreement with the experimental data.
