氧化的中波红外激光吸收断层扫描用于H2-N2O火焰中空间分辨量的定量热化学
Applied optics
|August 12, 2025
概括
一种新的断层激光吸收光谱法量化地绘制了反应流中的分子分数和温度. 这种技术对于研究基燃料的绿色推进和燃烧至关重要.
科学领域:
- 燃烧科学与工程 燃烧科学与工程
- 光谱学和分析化学 分析化学
- 航空航天推进器 航空航天推进器
背景情况:
- 了解反应流中的热化学结构对于开发先进的燃烧和推进系统至关重要.
- 基于的燃料和推进剂,包括绿色推进概念,需要对其燃烧产品和温度配置文件进行详细分析.
- 当前的诊断技术往往缺乏充分描述复杂火焰结构所需的空间分辨率.
研究的目的:
- 提出和验证一个断层激光吸收光谱 (TLAS) 技术,用于量化,空间分辨率测量反应流.
- 将TLAS应用于氧化 (H2-N2O) 预混合喷气火焰,与绿色推进相关.
- 测量氧化 (N2O),氧化 (NO),水蒸气 (H2O) 和气体温度的分子分数.
主要方法:
- 利用中波红外可调节的量子和带间级联激光器来探测N2O,NO和H2O的振动过渡.
- 采用断层图形重建算法来生成物种分子分数和温度的二维和三维配置文件.
- 开发信号处理方法,包括通过博尔兹曼回归直接N2O温度计,用于定量分析.
主要成果:
- 在喷射火焰以上的多个高度成功地恢复了N2O,NO和H2O的空间分辨率分子分量概况.
- 在H2-N2O喷气火焰中确定气体温度分布.
- 确定了不同的反应区,其特点是产生H2O和NO,围绕一个含有N2O的冷芯.
结论:
- 经过证明的TLAS技术提供了一个强大的定量工具,用于在小直径反应流中空间解析热化学性质.
- 这种方法在研究基燃料的燃烧和推进绿色推进技术方面具有显著的应用性.
- 对物种和温度的详细绘制揭示了对火焰结构和反应途径的关键见解.
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