摘要
为了实现高分辨率的三维温度测量技术,提出了一种基于光学相干层析的三维温度测量技术。根据气相火焰的散射特点,建立相干测量火焰温度场的数学模型,通过数值模拟两种雷诺数(Re=10 000,20 000)下的Sandia Flame D三维温度场,以及光学相干层析在上述两种工况下测量的三维温度场。模拟结果表明:在设定的模拟条件下,对于低湍流程度火焰,光学相干层析相干长度小于火焰最小尺度,三维温度场测量具有一定的可行性。这将为光学相干层析测量三维温度场分布提供理论依据。
A novel approach for achieving high-resolution,three-dimensional temperature measurement is proposed by utilizing optical coherence tomography.A mathematical model is developed based on the scattering properties of gas-phase flames for coherent measurement of the flame temperature field.Numerical simulations are conducted to generate threedimensional temperature fields for Sandia Flame D at two different Reynolds numbers(Re=10000,Re=20000),and the feasibility of measuring the three-dimensional temperature field using optical coherence tomography is demonstrated under these simulation conditions.Specifically,the coherence length of optical coherence tomography is found to be shorter than the minimum scale of the flame for low turbulent flow rate flames,indicating that the proposed approach can successfully measure the three-dimensional temperature field distribution.These findings provide a theoretical foundation for utilizing optical coherence tomography to measure three-dimensional temperature fields.
作者
胡逸凡
刘勇
HU Yi-fan;LIU Yong(School of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200090,China)
出处
《光学与光电技术》
2023年第5期91-98,共8页
Optics & Optoelectronic Technology
关键词
气相火焰
三维温度测量
光学相干层析
Rayleigh散射
高空间分辨率
gas phase flame
three-dimensional temperature measurement
optical coherence tomography
Rayleigh scattering
high spatial resolution
