化学发光火焰三维重建研究综述

Summary of research on flame 3D reconstruction based on computed tomography of chemiluminescence technology

燃烧过程具有三维、高温、湍流、非稳态等特性,其精确测量存在一定的难度,一直是国内外研究的热点。化学发光计算断层成像(CTC)技术将化学发光技术和计算机断层成像(CT)技术相结合,通过直接拍摄不同角度的火焰图像,利用重构算法进行重建,可以快速准确地实现火焰三维结构的精细刻画。CTC系统以火焰的自发光作为光源,因此不需要额外的光源设备,这使得该系统具有容易搭建、可在复杂环境下实现等优势,可以用于高温、湍流火焰的实时测量,对于研究复杂燃烧流场、提高燃烧效率有着十分重要的意义。本文首先介绍了CTC技术的基本原理,然后从成像模型、重构算法、实验方法和应用方向4个方面介绍了CTC技术在火焰重构方向的研究进展,最后讨论了CTC技术的发展趋势。

Due to the characteristics of combustion such as three-dimension,high temperature,turbulence,and unsteady state accurate measurement of the combustion is difficult and is a hot research topic.Computed Tomography of Chemiluminescence(CTC)combines the chemilumine-scence and CT technology.By directly shooting flame images from different angles and using reconstruction algorithms to reconstruct the flame,a fine description of the three-dimensional structure of the flame can be achieved quickly and accurately.The self-luminescence of the flame is used in the CTC as the light source,so there is no additional light source equipment required,which makes the system easy to build and can be implemented in a complex environment.These advantages enable the CTC technology to be used for real-time measurement of high temperature and turbulent flames,which is of great significance for studying complex combustion flow fields and improving combustion efficiency.In this paper,the basic principles of the CTC technology are introduced firstly,and then the research progress of the CTC technology in the direction of 3D reconstruction of flame is introduced in four aspects:the imaging model,the reconstruction algorithm,the experimental equipment and its application.Finally,the development trend of the CTC technology is discussed.