切向狭槽自由出流特性及流量系数分析  

Flow Characteristics and Flow Coefficient Analysis of Tangentical Narrow-slot Free Flow

作　　者：孟祥宇[1] 王学生[1] 陈琴珠[1] 张庆[1] MENG Xiang-yu;WANG Xue-sheng;CHEN Qin-zhu;ZHANG Qing(Key Laboratory of Pressure System and Safety,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237

出　　处：《科学技术与工程》2018年第29期104-108,共5页Science Technology and Engineering

摘　　要：建立切向狭槽自由出流流量系数的数学模型,分别进行了水、乙醇水溶液、乙二醇水溶液及多乙二醇溶液四种介质的冷膜实验,分析了液位高度、狭槽尺寸及物料物性等对流量系数的影响规律,确定了狭槽宽度的最佳开口范围为2.2～2.5 mm,并进一步给出了该狭槽在不同液位高度下的流量系数计算公式,为切向狭槽布膜器的工程应用提供了理论依据。A mathematical model of free flow coefficient of tangential slot is established.The cold film experiments of water,ethanol,glycol and polyethylene glycol are carried out,analyzing the influence of liquid level height,slot size and material properties on flow coefficient.The optimal opening range for slot width is 2.2 mm to 2.5 mm,a formula for calculating the flow coefficient of the slot at different level height is given,establishing the design theory for the application of tangential slot distributor.

关 键 词：切向狭槽布膜器 自由出流 流量系数 冷膜实验 

分 类 号：TQ051.21[化学工程]