用于两相流流型显示和空隙率测量的电容层析成像技术  

APPLICATIONS OF ELECTRICAL CAPACITANCE TOMOGRAPHY TECHNIQUE TO FLOW PATTERN DISPLAY AND VOIDAGE MEASUREMENT OF TWO-PHASE FLOW

作　　者：黄志尧[1] 王保良[1] 李海青[1] 

机构地区：[1]工业控制技术国家重点实验室,浙江大学控制系自动化仪表研究所,浙江杭州310027

出　　处：《化工学报》2001年第11期1035-1038,共4页CIESC Journal

基　　金：国家自然科学基金青年基金 (No .2 970 6 0 0 8);国家自然科学基金重大项目 (No .5 9995 46 0 -5 )资助项目~~

摘　　要：Based on electrical capacitance tomography technique, a novel method for flow pattern display and voidage measurement of two-phase flow was proposed. A 12-electrode ECT measurement system was developed. The weighted back projection algorithm was selected as the image reconstruction algorithm to satisfy the requirement of flow pattern display. Combining the principle of Tikhnov regularization theory with the ART(Algebraic Reconstruction Technique) algorithm, a new quantitative image reconstruction algorithm was developed to implement voidage measurement of two-phase flow. Experimental results of gas-liqiud two-phase flow and gas-solid fluidized bed showed that the developed measurement system was successful. The speed of image reconstruction of flow pattern display was greater than 20 frames per second. The maximum error of voidage measurement is less than 5% and the time of voidage measurement is less than 2 seconds.Based on electrical capacitance tomography technique, a novel method for flow pattern display and voidage measurement of two-phase flow was proposed. A 12-electrode ECT measurement system was developed. The weighted back projection algorithm was selected as the image reconstruction algorithm to satisfy the requirement of flow pattern display. Combining the principle of Tikhnov regularization theory with the ART(Algebraic Reconstruction Technique) algorithm, a new quantitative image reconstruction algorithm was developed to implement voidage measurement of two-phase flow. Experimental results of gas-liqiud two-phase flow and gas-solid fluidized bed showed that the developed measurement system was successful. The speed of image reconstruction of flow pattern display was greater than 20 frames per second. The maximum error of voidage measurement is less than 5% and the time of voidage measurement is less than 2 seconds.

关 键 词：两相流 流型 空隙率 电容层析成像 测量 12电极 ECT检测系统 

分 类 号：O359.1[理学—流体力学] TB126[理学—力学]