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

高速光谱和可视化分析一氧化碳-氢-氧燃烧等离子体的温度和密度场

• 批准号: 08458113
• 负责人: KAYUKAWA Naoyuki
• 金额: $ 4.67万
• 依托单位: Hokkaido Univercity
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08458113/
• 关键词: Polarized Two-Path Spectrometer; Coal Gas Combustion Plasma; Depth-AAC Relationship; Flame Image Analysis; Magnetic Resonance Imaging; Modified Pulse Sequences; Velocity Visualization; 偏光2光路分光光学系; CO・H_2・O_2燃焼プラズマ; 画像解析; 高速MRI; 石炭合成ガス; 酸素燃焼

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

该项目旨在获得 MHD 发电机工作流体的基本特性，MHD 发电机是环境可接受的 MHD/燃气轮机/蒸汽轮机联合发电系统的关键部件，高速光谱测量和流动可视化的建立也很重要。构建了高速双路发射/吸收光谱仪，其中火焰发射和参考灯加上火焰发射/吸收强度作为两个正交偏振光束同时测量。通过钾种子乙炔-氧燃烧等离子体的光谱复合证实了光学系统的性能，并根据作者先前提出的光学深度-吸收系数关系（Depth-AAC关系）进行了计算的光学截面。钾的浓度是合理的，因此在乙炔等离子体实验中也阐明了深度-AAC关系的适应性，然后对煤合成燃料碳进行了建模。测试一氧化氢燃烧等离子体并获得温度、钾光学截面和钾浓度，测量温度低于预期，但新发现即使在贫燃料条件下温度也会随着降低而升高。在可视化实验中，从光学薄火焰的发射/吸收图像数据获得局部原子密度分布。最后，作为一种流动可视化技术，采用了新设计的磁共振成像方法。平面回波脉冲序列(MEPS) 测量了冲击加热等离子体的横截面速度分布，该图像在空间中分辨率良好，并且与 MHD 感应开路电压减少的图像非常吻合。

项目成果

Naoyuki Kayukawa: "MHD/Gas Turbine/Steam Turbine Combined Cycle with Thermochemical Heat Recovery" AIAA 28th Plasmadynamics and Laser COnference. No.2370. (1997)

Naoyuki Kayukawa：“MHD/燃气轮机/蒸汽轮机联合循环与热化学热回收”AIAA 第 28 届等离子动力学和激光会议。

Naoyuki Kayukawa: "Diagnostics of MHD Flow Field using Echo-Planar Magnetic Resonance Imaging" Proceedings of the 3rd Transfer Phenomena in MEHD Flows. Vol.1. 475-480 (1997)

Naoyuki Kayukawa：“利用回波平面磁共振成像诊断 MHD 流场”MEHD 流中第三次传递现象的论文集。

Naoyuki, Kayukawa: "Diagnostics of Optical Cross Section of Seed Atoms and Wing Emission Intensity by Optical Oepth-AAC Relationship" Proceedings of the International Conference on MHD Electrical Power Generation. Vol.2. 668-674 (1996)

Naoyuki, Kayukawa：“通过光学 Oepth-AAC 关系诊断种子原子的光学横截面和翼发射强度”MHD 发电国际会议论文集。

Naoyuki Kayukawa: "Diagnostics of Optical Cross Section of Seed Atoms and Wing Emission Intensity by Optical Depth-AAC Relationship" Proceedings of the International Conference on MHD Electrical Power Generation. Vol.2. 668-674 (1996)

Naoyuki Kayukawa：“通过光学深度-AAC 关系诊断种子原子的光学横截面和翼发射强度”MHD 发电国际会议论文集。

Naoyuki Kayukawa: "Two-Path Polarized Light Spectroscopy and Analysis of Seeded Combustion Plasma with Depth-ACA relationship" (To be appeared in) Proceedings of the 33rd Intersociety Energy Conversion Engineering Conference. (1998)

Naoyuki Kayukawa：“双路偏振光光谱和种子燃烧等离子体与深度-ACA关系的分析”（发表于）第33届社会间能源转换工程会议论文集。