摘要
激光吸收光谱断层诊断技术(TDLAT)是将可调谐半导体激光吸收光谱技术(TDLAS)与计算机断层诊断技术(CT)相结合的一种新型的流场二维测量技术。该测量技术具有灵敏度高、抗噪声能力强等优势,可用于高温、高速、有毒等严苛环境下的流场监测,尤其在燃烧和推进流场测量中具有广阔的应用前景。首先介绍了TDLAT测量的基本理论,其次将TDLAT系统分为4个基本模块,即光学测量模块、数据处理模块、重建算法模块和后处理模块,分别对各模块的研究现状和关键技术进行了综述和对比分析,再次,列举了TDLAT在超燃冲压发动机、航空发动机和燃煤锅炉上的应用,最后讨论了TDLAT在燃烧流场测量中的发展趋势和有待解决的问题。介绍的TDLAT技术研究现状、关键技术及发展动态可为相关研究人员提供参考。
Tunable Diode Laser Absorption Tomography(TDLAT)technique is a new technique for 2 Dflow field diagnostics,which combines the Tunable Diode Laser Absorption Spectroscopy technique(TDLAS)and the computer tomography(CT).It has wide applications in hot,high-speed and toxic gas diagnostics,especially for combustion and propulsions in harsh environments,due to the merits of high sensitivity and noise resistance.Firstly,the fundamentals of the TDLAT are presented.Secondly,the TDLAT system is divided into four stages:the optical measurement system,the data processing system,the reconstruction algorithm and the data presentation.The progressing on the four stages and key technologies are discussed.Thirdly,some examples of applications of TDLAT sensors in practical combustion diagnostics are presented,including scramjet engines,aero-propulsion engine and coal-field combustion.Finally,the development tendency and conclusions are given.This paper can provide reference for the researchers to comprehend the progress and key techniques of TDLAT.
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2018年第1期43-54,共12页
Journal of Experiments in Fluid Mechanics
基金
国家自然科学基金(61505263,61505262)
关键词
激光吸收光谱
断层诊断技术
光学测量
数据处理
重建算法
laser absorption spectroscopy
computer tomography
optical measurement
data processing
reconstruction algorithm
