Analysis of Temperature and Density Field of Carbon Monoxide-Hydrogen-Oxygen Combustion Plasma by Means of High-Speed Spectrometry and Visualization

该项目旨在获得磁流体发电机工质的基本性质，该发电机是环境可接受的磁流体/燃气轮机/汽轮机联合发电系统的关键部件。搭建了一台高速双路发射/吸收光谱仪，将火焰发射和参照灯加火焰发射/吸收强度作为两束垂直偏振光同时测量。通过对掺钾乙炔氧燃烧等离子体的光谱分析，证实了该光学系统的性能。数据分析是基于作者提出的光学深度-吸收系数关系(深度-AAC关系)进行的。计算的钾的光学截面是合理的，从而证实了深度-AAC关系的适应性。…的条件在乙炔等离子体实验中，对合适波长的更多选择也得到了阐明。其次，对煤基合成燃料进行了模拟，对一氧化碳-氢气燃烧等离子体进行了测试，得到了等离子体的温度、钾的光学截面和钾的浓度。测得的温度低于预期。然而，最近的研究表明，即使在燃料贫化的情况下，随着氧当量比降低到1以下，温度也会升高。在可视化实验中，从光学稀薄火焰的发射/吸收图像数据中获得了局域原子密度分布。最后，作为一种流动显示技术，采用了新设计的回波平面脉冲序列(MEP)的磁共振成像方法。测量了激波加热等离子体的截面速度分布。重建的图像在空间上具有很好的分辨率，与由MHD感应开路电压得到的图像吻合得很好。较少

This project aims to obtain basic properties of working fluids for an MHD power generator with is a key component in an environmentally acceptable MHD/Gas Yurbine/Steam Turbine combined power generation system. The establishment of a high-speed spectrometry and flow visualization are also important objectives.A high-speed two-path emission/ absorption spectrometer was construced, in which the flame emission and the reference lamp plus flame emission/ absorption intensities were simultaneously measured as two orthogonally polarized light beams. The performance of the optical system was confirmed by spectrometric analyzes of potassium seeded acetylene-oxygen combustion plasmas. The data analysis was carried out based upon the optical depth-absorption coefficient relationship (Depth-AAC relationship) formerly proposed by the author. The calculated optical cross section of the potassium was reasonable and thus the adaptability of the depth-AAC relationship was confirmed. The conditions for … More selection of the appropriate wavelengths were also clarified in the acetylene plasma experiment. Next, modeling the coal synthesized fuel, the carbon monoxide-hydrogen combustion plasma was tested and the temperature, the potassium optical cross section and the potassium concentration were obtained. The measured temperature was lower than expected. However it was newly shown that the temperature was increased even under a fuel lean condition with the decrease in the oxygen equivalence ratio below unity. In the visualization experiments the local atom density sistribution was obtained from an emission/ absorption image data from an optically thin flame. Finally, as a flow visualization technique, the magnetic resonance imaging method was employed using newly designed echo-planar pulse sequences (MEPS). The cross sectional velocity distribution of shock-heated plasma was measured. The reconstructed image was well resolved in space and agreed well with those reduced from the MHD induced open circuit voltage. Less