摘要
基于空气折射率梯度测量的原理,采用投影式背景纹影技术,设计了非接触式火焰温度场测量仪。测量仪以半导体激光器作为光源,采用CCD快速成像,结合粒子图像速度场仪技术,获取了图像上粒子的偏移量以量化偏折角。采用Radon变化求得折射率梯度,利用空气折射率对温度的非线性曲线拟合方程直接得出流场各区域的温度场,采用反投影重建技术对火焰的不均匀温度流场进行了三维重构,实现了火焰温度场的可视化测量。
Based on the principle of air refractive gradient measurement, a non-contact flame temperature field measurement instrument is designed using the projective background-oriented schlieren technique. A laser diode is used as the light source. Based on the CCD fast imaging and the particle image velocimetry technique, the offset of particles in the photograph is obtained to quantify the deflection angle. The refractive index gradient is obtained by Radon transform. The temperature field in each region of the flow field is obtained directly using the nonlinear curve fitting equation of air refractive index to temperature. The three-dimensional non-uniform temperature field is reconstructed by the back-projection algorithm. Thus, the visualization of flame temperature measurement is achieved.
作者
张正贺
黄贞
陈汝婷
薛晓惠
严春晖
黄恒烽
李栋宇
Zhang Zhenghe;Huang Zhen;Chen Ruting;Xue Xiaohui;Yan Chunhui;Huang Hengfeng;Li Dongyu(School of Physics Science and Technology, Lingnan Normal University,Zhanjiang,Guangdong 524048, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2019年第5期235-242,共8页
Laser & Optoelectronics Progress
基金
广东省科技计划(2016A040403124)
湛江市科技计划(2017A02024)
岭南师范学院高等教育教学改革项目(LSJG024)
关键词
传感器
背景纹影技术
投影式
粒子图像速度场仪技术
反投影重建
火焰温度场
sensors
background-oriented schlieren technique
projective
particle image velocimetry technique
back projection reconstruction
flame temperature field
