Effects of hydrogen addition on soot formation in flames: experimental investigation by laser imaging

添加氢气对火焰中烟灰形成的影响：激光成像实验研究

• 批准号: 2772688
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2772688
• 关键词: Effects; hydrogen; addition; soot; formation

Numerous scientific studies have indicated that soot particles, commonly produced during the incomplete combustion of hydrocarbons, pose a serious public health risk. Understanding the formation mechanism of soot is helpful for reducing the emission of soot and its adverse effects on human health and the environment. Strategies for reduction of soot depend on the understanding of soot formation mechanisms, which may be aided by the capabilities of soot distributions measurements, including reliable measurement of soot parameters such as particle size, number density, and soot volume fraction. The effect of hydrogen on soot formation is a focus of attention for this project. Literature has shown that the introduction of hydrogen into sooting flames enhances or inhibits the formation of soot particles and their precursors depending on the operating conditions. Hydrogen-doped flames are obtained by replacing/adding a certain amount of Hydrogen fuel in the flame, by keeping certain parameters constant. Over the past 20 years, laser-induced incandescence (LII) has proven in numerous studies to be a useful diagnostic tool for spatially and temporally resolved measurement of soot volume fraction in a wide range of applications, such as laminar and turbulent flames, in-cylinder combustion, and engine exhaust gas characterisation. This technique will be used for the purpose of this project.Overall, the aim of this project is to understand the formation mechanism of soot and determining strategies towards soot emission reduction by adding Hydrogen in fuel/air mixtures.

许多科学研究表明，碳氢化合物不完全燃烧过程中通常产生的烟尘颗粒对公众健康构成严重威胁。了解烟尘的形成机理有助于减少烟尘的排放及其对人体健康和环境的不利影响。减少碳烟的策略取决于对碳烟形成机制的理解，这可以通过碳烟分布测量的能力来帮助，包括碳烟参数的可靠测量，例如颗粒尺寸、数密度和碳烟体积分数。氢对碳烟形成的影响是该项目关注的焦点。文献已经表明，将氢引入到烟灰火焰中增强或抑制烟灰颗粒及其前体的形成，这取决于操作条件。掺氢火焰通过在火焰中替换/添加一定量的氢燃料，通过保持某些参数恒定来获得。在过去的20年里，激光诱导白炽（LII）已被证明是一个有用的诊断工具，在空间和时间分辨测量碳烟体积分数在广泛的应用，如层流和湍流火焰，缸内燃烧，发动机排气特性。该技术将用于本项目的目的。总体而言，本项目的目的是了解碳烟的形成机理，并确定通过在燃料/空气混合物中添加氢气来减少碳烟排放的策略。