用X型热膜探针测量筛孔板上液流速度场的方法探索  

RESEARCH FOR METHOD MEASURING LIQUID FLOW VELOCITY ONSIEVE TRAY BY HOT-FILM ANEMOMETER WITH X-TYPE PROBE

作　　者：刘春江[1] 袁希钢[1] 余国琮[1] 

机构地区：[1]天津大学化学工程研究所,天津300072

出　　处：《化工学报》2001年第7期626-629,共4页CIESC Journal

基　　金：国家自然科学基金资助项目 (No .2 96760 2 9)&&

摘　　要：Flow pattern or velocity distribution on a distillation tray is of great importance in determining tray efficiency. And design of distillation process is mainly rely on experimental data which also can be used in verification of mathematical model for describing the flow pattern on a tray.In this paper,hot-film anemometer with X-type probe is applied to the measurement of gas-liquid two-phase flow on a sieve tray.First,a calibration method that used in this paper is proposed and a computational model for data processing is presented.Then the threshold method used to separate vapor signals from those of the liquid is described.Finally,typical measuring results,which include the magnitude and direction of local velocity,and the distribution of turbulent kinetic energy,are presented.Flow pattern or velocity distribution on a distillation tray is of great importance in determining tray efficiency. And design of distillation process is mainly rely on experimental data which also can be used in verification of mathematical model for describing the flow pattern on a tray.In this paper,hot-film anemometer with X-type probe is applied to the measurement of gas-liquid two-phase flow on a sieve tray.First,a calibration method that used in this paper is proposed and a computational model for data processing is presented.Then the threshold method used to separate vapor signals from those of the liquid is described.Finally,typical measuring results,which include the magnitude and direction of local velocity,and the distribution of turbulent kinetic energy,are presented.

关 键 词：热膜流速仪 筛孔板 气液两相液 塔板 流速分布 湍动动能分布 流速测量 X型热膜探针 

分 类 号：TQ056.15[化学工程] TQ021.1