Study of Pollutant Formation and Its Control in the Non-Uniform Combustion

非均匀燃烧污染物生成及其控制研究

• 批准号: 05452159
• 负责人: IKEGAMI Makoto
• 金额: $ 4.54万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452159/
• 关键词: Non-Unifrom Combustion; Turbulent Mixing; Nitrogen Oxides; Chemical Kinetics; Two-Stage Combustion; Jet Diffusion Flame; Particle Image Velocimetry; Laser Light-Sheeting Method; バロクリニック効果; 粒子画像流速測定

This study aims at the clarification of the non-uniform combustion process in highly-turbulent flowfields for controlling pollutant formation during combustion. The contents of the prsent study are summarized as follows :1.Turbulence in jet diffusion flames was investigated based on observations of instantaneous LLS (laser-light sheet method) images of turbulent eddies. Results show that only larger eddies can be seen mainly on the azimuthal cross-section, and that mixing between fuel and air mainly proceeds by stretching of the interfacial layr during development of vortex rings due to an ejecting flow. Furthermore, the capability of inducing vortices near the zone of a higher density gradient due to baroclinic effect was discussed using a vorticity-transport equation.2.Particle image velocimetry (PIV) for measuring velocity vectors in a turbulent flow was developed based on a two dimensional cross-correlation coefficient between two images with a small time interval. An accuracy of P … More IV was assessed at probable errors using the simulated images. The measured results in jets and jet flames reveal that vortex rings produced associated with the unsteady motion in the shear layr promote the mixing, whereas in the reacting region fluctuating motions are laminarized due to an increase in temperature, causing the complicated pattern of soot layrs in the downstream of flame.3.Production and destruction of nitrogen oxides in the two-stage combustion was investigated based on a detailed chemical kinetics. From the analysis of dilution processes of methane-air fuel-rich burnt gas, it is shown that fast mixing due to strong turbulence causes a considerable NOx reduction, and that a further reduction can be achieved if the temperature decreases with the volume expansion prior to the heat-release due to the dilution. In addition, reaction paths into NOx formation were discussed in the conditions of different presure and air-temperature, and contributions of individual elementary reactions were given by the integration of each NO formation rate. Less

这项研究的目的是阐明高度扰动的流场中的不均匀混合过程，以控制组合过程中污染物的形成。客户研究的内容总结如下：1。基于瞬时LLS（激光光片法）的湍流涡流图像研究了喷射扩散火焰中的扰动。结果表明，仅在方位角横截面上只能看到较大的涡流，而在燃料和空气之间的混合主要通过在涡流环的发展过程中伸展界面层来进行，这是由于弹出流动的流动而进行的。此外，使用涡度传输方程讨论了由于斜压效应而引起的高密度梯度区域附近的感应涡度的能力。2.Tarpicle图像速率（PIV）基于湍流中的湍流中的速度载体（PIV），基于湍流中的速度载体，基于两个尺寸的跨二维系数在两个尺寸的时间内与小时的时间间隔开发。使用模拟图像在有问题的错误中评估了P…更多的IV的精度。测得的射流和喷气火焰的结果表明，与剪切剪切中的不稳定运动相关的涡度环促进混合，而在反应区域中，由于温度的升高，反应区域波动的动作被层流层流，由于soot layrs的复杂模式在soot soot的下降和详细剂中引起。化学动力学。通过分析甲烷 - 空气燃料富含气体的稀释过程，可以表明，由于强烈的湍流而引起的快速混合会导致可考虑的NOX降低，并且如果温度随着体积膨胀而在热量释放引起的稀释液引起的体积膨胀之前，可以进一步降低。此外，在不同的呈现和空气温度的条件下讨论了进入NOX形成的反应路径，通过每个NO形成速率的整合给出了单个基本反应的贡献。较少的

项目成果

塩路昌宏: "相互相関PIVによる噴流火炎内ガス流動の解析" 第32回燃焼シンポジウム講演論文集. 434-436 (1994)

Masahiro Shioji：“使用互相关 PIV 分析喷射火焰中的气流”第 32 届燃烧研讨会论文集 434-436（1994 年）。

M.Shoji: "Analysis of Gas Flows in a Trubulent Jet Flame using Cross-Correlation PIV" 32nd Symposium on Combus-tion. 434-436 (1994)

M.Shoji：“使用互相关 PIV 分析湍流射流火焰中的气流”第 32 届燃烧研讨会。

塩路 昌宏: "燃焼ガスの希薄化過程におけるNOxの生成および分解" 日本機械学会講演論文集(関西支部第70期定時総会講演会). No.954-2. (1995)

Masahiro Shioji：“燃烧气体稀释过程中NOx的生成和分解”日本机械工程师学会会议记录（第70届关西分会年会）（1995年）。

塩路 昌宏: "温度低下と希薄化を受ける燃焼ガスのNOx生成および分解" 日本機械学会講演論文集(関西支部第253回講演会). No.944-4. 209-211 (1994)

Masahiro Shioji：“经过温度降低和稀释的燃烧气体的NOx生成和分解”日本机械工程师学会会议记录（第253届关西分会）第209-211号（1994年）。

山田 修: "過濃および過薄ガスの混合を伴う燃焼における窒素酸化物の生成と分解" 日本機械学会関西支部第69期定時総会講演会. (発表予定). (1994)

Osamu Yamada：“涉及富气和贫气混合物的燃烧中氮氧化物的生成和分解”在日本机械工程学会关西分会第 69 届年度大会上的演讲（待发表）。