摘要
为克服实际工程应用中火焰辐射特性未知导致对火焰温度和辐射特性协同重建的低效率和低精度难题,结合主动激光层析吸收光谱和被动辐射成像技术,提出一种基于主被动层析融合的高温碳烟火焰多物理场协同重建的新方法。结合多谱段下激光层析透射测量信号和火焰自发辐射光场测量信号,根据火焰弥散介质辐射传输机理建立主被动层析的多场协同重建模型,对数值模拟高温碳烟火焰和耶鲁大学实验燃烧火焰的三维辐射物性场、温度场及气固两相燃烧产物组分浓度场的协同重建进行模拟研究,并对多种测量信号的随机误差进行误差传递分析。结果表明:当激光信噪比大于25 dB时,模拟火焰衰减系数场重建的相关系数接近1,重建的温度场与真值吻合较好;当激光信噪比大于30 dB时,实验火焰碳烟颗粒浓度场重建的相关系数接近1,温度场重建相关系数约为0.83;光场信号测量噪声对温度重建精度的影响比激光测量噪声显著,应尽可能保证激光与光场测量系统的标定精度。
A new combustion diagnosis and measurement technology should be developed in order to realize the collaborative reconstruction of multiple physical parameter fields,such as the three-dimensional temperature field,the radiation physical property field,and the component concentration field of the gas-solid combustion products of the high-temperature soot flame.In order to overcome the problem of low efficiency and low accuracy in the coordinated reconstruction of flame temperature and radiation property caused by unknown radiation characteristics in practical engineering applications,a new method of collaborative reconstruction of multi-physical parameter fields of high temperature soot flame based on active and passive tomography fusion is proposed by combining active laser tomography absorption spectroscopy and passive radiation imaging technology.Based on the radiation transmission mechanism of the flame dispersion medium,a multi-parameter collaborative reconstruction model of active and passive tomography is established by combining the transmission measurement signal of laser tomography and spontaneous emission light field measurement signal of flame in the multi-spectral range.According to the numerical simulation flame and the combustion experiment data of Yale University,the cooperative reconstruction of three dimensional radiation physical property,temperature and the gas-solid two-phase combustion product component concentration field of the high-temperature soot flame was simulated and studied,and the error transfer analysis is carried out on the measurement noise of various signals.The results show that when the laser signal-to-noise ratio is greater than 25,the correlation coefficient of the reconstructed extinction coefficient field of the simulated flame is close to 1,and the reconstruction results of temperature field is in good agreement with the true value;When the laser signal-to-noise ratio is greater than 30,the correlation coefficient of reconstructed soot concentration field of the experiment
作者
高包海
齐宏
史景文
牛志田
任亚涛
何明键
GAO Baohai;QI Hong;SHI Jingwen;NIU Zhitian;REN Yatao;HE Mingjian(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Key Laboratory of Aerospace Thermophysics,Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150001,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2023年第5期1135-1147,共13页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金(51976044)
国家科技重大专项(2017-Ⅴ-0016-0069)。
关键词
主动激光层析
光场成像技术
高温碳烟火焰
辐射反问题
多参数场重建
active laser tomography
light field imaging technology
high-temperature soot flame
inverse radiation problem
multi-parameter reconstruction
