摘要
RP-3航空煤油是航空发动机的常用燃料之一,火焰温度及碳烟浓度分布作为反映燃烧状态最直接的参数,是燃料优化配比的重要数据支撑。针对三维测量中,重建路径计算的准确性受相机位姿影响的问题,提出了一种将三维辐射成像法与相机立体标定技术相结合的测量方法。数值模拟结果表明,所提方法可以在提供较高的空间分辨率的同时保证测量结果的可靠性。利用标定后的六相机测量系统,对RP-3、空气预混火焰进行了实验测量,获得了其三维温度及碳烟浓度分布。测量的空间分辨率为1 mm×1 mm×1 mm,重建与热电偶测量温差的标准不确定度为0.58 K,证明了测量方法的精确性。
RP-3 jet fuel is one of the frequently utilized fuels in aviation engines.Temperature and soot volume fraction distribution of flame are the vital data support for fuel optimization,which can directly indicate the state of combustion.The precision of the reconstruction path in three-dimensional measurement was influenced by camera position and attitude.A novel method that combines the radiation imaging system and the camera stereo calibration technology was proposed to address this problem.According to the results of numerical simulation,the method could not only guarantee the accuracy of measurement results,but also provide high spatial resolution.The experimental measurement of RP-3 and air premixed flame were carried out.The three-dimensional temperature and soot volume fraction distribution were also obtained by the calibrated six-camera system.The spatial resolution was 1 mm×1 mm×1 mm,and the uncertainty of temperature difference between reconstructed and thermocouple measured temperature was 0.58 K,demonstrating the accuracy of the method.
作者
左冰娴
周宾
戴明露
ZUO Bingxian;ZHOU Bin;DAI Minglu(School of Energy and Environment,Southeast University,Nanjing 210096,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2024年第4期1273-1281,共9页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家重点研发计划(2017YFB0603204)
国家自然科学基金(50976024,50906013)。
