摘要
用折射率测量方法来获取被测流场温度分布时,应该首先确定流场成分。提出了一种联合相位和发射强度分布对流场进行区域划分的方法,以更好地确定每个区域的成分,尽可能提高温度重建的精度。选取蜡烛-空气(非预混火焰)和丙烷-空气(预混火焰)燃烧流场作为实验对象,将折射率、相位和发射强度分布进行匹配,在此基础上分析并确定两个流场不同区域的成分。通过比较基于相位分区方法(模型1)、发射强度分区方法(模型2)以及联合相位和发射强度分区方法(模型3)获得的温度结果,发现模型3的结果更合理。此外,还进一步讨论了联合相位和发射强度分布对流场进行区域划分的合理性和适用性,该结果可为基于折射率测量进行复杂流场温度重建的研究提供一些参考。
Composition should be initially determined when analyzing temperature distribution using the refractive index measurement method.A method which divides the measured flow field by combining the phase and emission intensity distributions is proposed to confirm the composition of each region and significantly improve the temperature reconstruction accuracy.Candleair(nonpremixed flame)and propaneair(premixed flame)combustion flow fields are selected for the experiments.The refractive index,phase,and emission intensity distributions are matched.The composition distributions of both flow fields are analyzed and confirmed.A comparison of the temperature results obtained using the phase partition method(Model 1),emission intensity partition method(Model 2),and integrating phase and emission intensity partition method(Model 3)shows that Model 3 is the most reliable.Furthermore,the reliability and adaptability of the method are analyzed and discussed.This study provides a reference for the temperature diagnosis of complex flow fields based on refractive index measurements.
作者
陈云云
段传森
崔芬萍
Chen Yunyun;Duan Chuansen;Cui Fenping(Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China;Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology(CICAEET),Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China;School of Physics and Optoelectronic Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第19期303-309,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61975083)。
关键词
折射率
相位分布
发射强度分布
温度分布
refractive index
phase distribution
emission intensity distribution
temperature distribution
