燃烧与流场在线测量诊断方法研究进展

Research advances in the in-line measurement techniques for combustion and flow field

介绍了上海理工大学颗粒与两相流测量研究所近年来在燃烧和流场在线测量诊断技术方面的研究进展,包括:改进基于光纤光谱仪的火焰辐射温度测量技术,提高火焰温度的测量精度与范围并反演出火焰辐射率及液体燃料组分;辐射与吸收光谱相结合测量脉冲燃烧火焰温度和水蒸气浓度;基于激光诱导荧光法测量喷雾液滴温度;强烟尘水滴干扰条件下基于差分吸收光谱法(DOAS)测量排放污染气体(SO2和NOx)浓度;基于饱和蒸汽原理的光谱法研制汞连续排放监测标准系统;光谱法与图像法结合测量高温物体温度场;基于单帧单曝光图像法测量多相流速度场与粒度分布;基于可调谐半导体激光吸收光谱法(TDLAS)同步测量液态纯水水膜蒸发过程中液态参数(水膜厚度及温度)与气态参数(水膜上方水蒸气的温度)等。

In this paper,the research advances in the in-line measurement techniques for com-bustion and flow field at Institute of Particle and Two-Phase Flow Measurement,University of Shanghai for Science and Technology have been presented.The flame radiation temperature measurement technique with fiber-based spectrometer has been improved,the flame temperature measurement accuracy and range were increased.Moreover,the flame emissivity and fuel compo-sition can be obtained.Temperature and water vapor concentration for detonation flame were de-termined by combining radiation and absorption spectroscopy methods.The spray droplet tem-perature was measured based on laser-induced fluorescence.Concentration of polluting gas emis-sions（SO2 and NOx）were obtained by differential optical absorption spectroscopy （DOAS）meth-od interfered by high density of dust and water droplets.Hg continuous monitoring system with spectroscopic method based on saturated vapor theory was developed.The temperature field of high-temperature object was measured with combination of spectroscopy and imaging methods. The velocity vector field and granularity distribution of multiphase flow were studied with single-frame and single-exposure imaging method.The liquid-phase parameter （film thickness and tem-perature）and vapor-phase parameter （water vapor temperature above the liquid film）during the liquid film evaporation process were simultaneously measured by tunable diode laser absorption spectroscopy （TDLAS）.