影响布液装置结构与设计的物性孔流系数模型  

Orifice Flow Coefficient Model Affecting Structure and Design of Liquid Distribution Devices

作　　者：范宇[1] 陈琴珠[1] 孟祥宇[1] 王学生[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《机械设计与研究》2015年第6期24-27,共4页Machine Design And Research

摘　　要：液体在重力作用下从布液装置向换热管内壁呈膜状流动的现象即为降膜流动,其成膜效果直接影响降膜蒸发器的传热性能,合理的布液装置结构与设计是决定降膜流动成膜效果的重要因素。当液体流量一定时,影响布液装置结构与设计是不同物性孔流系数。因此,建立降膜流动实验平台对布液装置进行研究,拟合不同物性下孔流系数C及成膜效果最佳的孔流系数范围,在此范围内设计布液装置结构与尺寸。结果表明：乙二醇物料小孔孔流系数C_（01）范围是0.718-0.754,布膜器开口孔流系数C_（02）范围是0.905-0.951,通过建立孔流系数C模型及范围,为工业乙二醇装置降膜蒸发器设计提供了重要的理论依据。Under the action of gravity, the liquid issues from the distribution device and forms a falling film. The heat transfer performance is determined by the film and the film is determined by the proper structure and design of liquid distribution device. When the liquid flow is constant, the structure and design of liquid distribution device is affected by the orifice flow coefficient. This paper evaluates the liquid distribution device by establishing the falling film flow experiment platfon＇n, fitting the orifice flow coefficient when using different liquid and finding the best range and then designing the structure and size of the liquid distribution device. The results show that the orifice flow coefficient of the hole CO1 ranges from 0.718 to 0. 754 and the orifice flow coefficient of liquid distribution device CO2 ranges from 0.905 to 0. 951 when using ethylene glycol. The orifice flow coefficient is been fitting to provide theoretical guidance for the industrial design of falling film evaporator for ethylene glycol.

关 键 词：降膜流动 布液装置 孔流系数 工业设计 

分 类 号：TQ053.6[化学工程]