雾化蒸发过程液滴多参数彩虹与空间滤波集成测量方法研究

Gas-liquid flow in the spray and evaporation process of a liquid is one of important research subjects in multiphase flow and combustion field. Investigation into the new measurement techniques for the droplet parameters in the process is one of important and fundamental directions in engineering thermodynamics and energy utilization field and is also a pressing problem to be solved in liquid spray and droplet evaporation experiments. Based on the previous study of the light scattering technique, spatial filtering method and rainbow refractometry for multiphase flow measurement in my lab, the objective of the project is to investigate a novel and integrated method for measuring the droplet size distribution,composition concentration, temperature and velocity in the spray and evaporation process. Measurement theory and method for 2-dimensional velocity of droplets will be proposed based on the spatial filtering effect of a CMOS matrix sensor; Mathematical models for the droplets size distribution, composition concentration and temperature measurement will be established based on the rainbow refractometry, especially for the size distribution and temperature distribution of the droplets with a substance and for the size and composition concentration of the compound droplets. An integrated measurement system including the spatial filtering velocimeter and rainbow refractometry for the droplet velocity, size and temperature will be built and be tested experimentally under laboratory conditions. The effects of the non-sphericity and absorption of the droplets on the rainbow refractometry will be also studied theoretically and experimentally. An integrated method for the droplet multi-parameter will be presented based on the ultimate research results of this project, which will provide a novel measurement technique for improving the research of the liquid spray and droplet evaporation process.

雾化蒸发气液流动是多相流与燃烧领域的一个前沿性研究课题，探索其测试分析新理论和新方法是工程热物理与能源利用领域的重要基础研究内容之一，也是当前国际上雾化蒸发特性实验研究的前沿和难点问题。本项申请在前期光散射、空间滤波及彩虹技术研究的基础上，提出开展雾化蒸发过程液滴粒度、组分/温度及速度彩虹测试方法专题研究：研究基于CMOS光学空间滤波效应的液滴二维速度测量方法；建立液滴粒度及分布、组分/温度彩虹测量理论及模型，特别是通过试验和理论分析，提出单组分下液滴粒度和温度分布及多组分下液滴粒度和浓度测量方法；开发基于彩虹和空间滤波的液滴颗粒速度、粒度及温度集成测量系统；从理论分析、数值模拟及实验,系统地研究非球形、吸收性等因素对粒度、温度、组分彩虹测量方法的影响，并提出校正算法。该项申请研究成果有望建立一套较完整的复杂雾化蒸发过程液滴多参数测量理论和方法，丰富研究手段，提高对雾化蒸发过程的认识水平。

雾化蒸发气液流动是多相流与燃烧领域的一个前沿性研究课题，探索其测试分析新理论和新方法是工程热物理与能源利用领域的重要基础研究内容之一，也是当前国际上雾化蒸发特性实验研究的前沿和难点问题。本项目在前期光散射、空间滤波及彩虹技术研究的基础上，提出了雾化蒸发过程液滴粒度及速度彩虹测试方法研：深入研究了单液滴参数彩虹技术及反演算法、吸收性液滴彩虹特性及参数反演算法、双层及多层球彩虹特性、液滴群全场彩虹特性及颗粒群粒度反演算法、光学空间滤波液滴速度测量方法、集成了相关测量系统，并开展了单液滴和喷嘴雾化液滴群彩虹及空间滤波液滴多参数测量实验；分析了椭球形液滴的几何彩虹角特性，系统地研究非球形、吸收性等因素对粒度、温度、组分彩虹测量方法的影响，并提出校正算法。国内外期刊发表论文20篇，国内外会议论文9篇，其中SCI/EI收录13篇，EI收录7篇；授权中国发明专利6项、实用新型专利3项，申请中国发明专利5项。培养博士生3名、硕士生6名；项目负责人许传龙教授获江苏省杰出青年基金资助(2015)。