电容层析成像技术应用于低温流体反演成像的研究现状  

State of the art of electrical capacitance tomography applied to cryogenic fluid inversion imaging

作　　者：吕海舟 金鑫 吴昀 叶蕴琦 李想 郁洋 LV Haizhou;JIN Xin;WU Yun;YE Yunqi;LI Xiang;YU Yang(Zhejiang Energy Natural Gas Group Co.,Ltd.,Hangzhou 310051,China;Zhejiang Baima Lake Laboratory Co.,Ltd.,Hangzhou 310000,China;Zhejiang Energy Technology Research Institute Co.,Ltd.,Hangzhou 310003,China)

机构地区：[1]浙江能源天然气集团有限公司,浙江杭州310051 [2]浙江浙能技术研究院有限公司,浙江杭州311100 [3]浙江省白马湖实验室有限公司,浙江杭州310002

出　　处：《能源工程》2024年第2期67-76,共10页Energy Engineering

摘　　要：高精度实时测量不同重力阶段贮箱内低温推进剂剩余量、空间分布以及低温两相流状态,已成为太空探索和安全储运的关键技术之一。电容层析成像(ECT)技术能非接触、实时和准确地反演重建贮箱内液体相分布图像。但相比于室温流体,低温流体液气介电常数比要小1个数量级以上,介电常数对压力和温度更敏感,ECT反问题方程病态性极强,电容测量噪声大且分辨率要求更高,传统基于灵敏场的反演算法难以达到实时和准确的反演要求。因此基于ECT的低温流体反演成像相比于室温流体如水-空气或油-空气,技术挑战更大。本文总结了国内外应用于低温流体ECT反演成像的算法以及系统的研究进展,有助于相关研究者全面了解研究现状和发展方向。The high precision real-time measurement of the residual amount and spatial distribution of cryogenic propellant in storage tanks at different gravity stages has become one of the key technologies in space exploration and transport.The Electrical Capacitance Tomography(ECT)can reconstruct image of the liquid phase distribution in the tank in a non-contact,real-time and accurate way.However,compared with room temperature fluid,the dielectric constant ratio of liquid to gas of cryogenic fluid is more than one order of magnitude smaller.The dielectric constant is more sensitive to pressure and temperature.The equation of ECT inverse problem is very ill conditioned.The noise of capacitance measurement is large and the resolution requirement is higher.The traditional inversion algorithms based on sensitive field are difficult to meet the requirements of real-time and accurate inversion.Therefore,ECT-based cryogenic fluid inversion imaging is even more technically challenging than a room-temperature fluid,like water-air or oil-air.This paper comprehensively reviews the research progress of the algorithm and system of cryogenic fluid ECT inversion imaging at home and abroad,which is helpful for the relevant researchers to comprehensively understand the research status and development direction.

关 键 词：电容层析成像 低温流体 反演成像 研究进展 

分 类 号：O359.1[理学—流体力学]