项目名称： 基于MIR-TDLAS的烃类燃料燃烧温度及组分浓度时间演变研究

项目编号： No.61475068

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 蔡廷栋

作者单位： 江苏师范大学

项目金额： 80万元

中文摘要： 烃类燃料是目前世界上可利用的重要能源之一，其燃烧过程，特别是在高压下的燃烧，具有瞬变、组分复杂等特点，过程中一些重要中间产物及参数的时间演变信息对于认识燃烧现象的本质，进而发现燃烧中的新现象、提出燃烧新概念必不可少，同时也是设计新型燃烧室的前提。 本项目拟采用3 μm波段的可调谐二极管激光器作为光源，在对以n-Heptane为代表的烃类燃料部分重要燃烧组分的光谱信息进行分析的基础上，使用波长对代替传统方法中的独立谱线，利用所选两波长处吸收信号之间的差分吸收开发一种可有效去除背景热辐射及其他分子干扰的时间分辨测量方法。并通过在1-20 atm、1000-2000 K范围内对燃烧温度和部分燃烧组分浓度的时间演变实现μs量级上的测量，得到不同燃烧条件下流场温度以及部分组分浓度的时间演变规律，为烃类燃料高压燃烧模型的建立及其可靠性验证提供实验数据的支持及为高压燃烧机理研究提供研究手段。

中文关键词： 激光吸收光谱；烃类燃料燃烧；组分浓度；燃烧温度；时间演变

英文摘要： Hydrocarbon fuel is one of the primary energy consumed in the world and has been researched widely in recent time. The intermediates during the process of hydrocarbon fuel combustion are complex and transient. Species time-histories data describing these intermediates are not only needed for the study of the principle of hydrocarbon fuel combustion, but also for the new phenonena discovery, new concept foundation, and the and development of the latest combustion technologies. The project is planned to develop a method for time-history measurements of multi-species concentrations and temperature during the process of hydrocarbon fuel combustion using the mid-IR tunable diode lasers near 3 μm. In this research, the isolated absorption line which usually used for measurement is replaced by wavelength pair. And the wavelength pairs used for the measurements of concentration and temperature are selected based on some selection rules. The differential absorption of the selected pairs are use to minimize the influence of background and interfering absorbers. The method can be used for the combustion diagnose at high temperature and high pressure. Interference-free time-history measurement at microsecond level is achieved using this method combined with fast scan of the laser and suppression of the background emission in the pressure range of 1-20 atm and the temperature range of 1000-2000 K. The obtained time-history rules can be used for the development and validation of high pressure combustion model.

英文关键词： laser absorption spectroscopy;hydrocarbon fuel combustion;concentration;temperature;time-history