| TDLAS测量甲烷／空气预混平面火焰温度和H2O浓度 |
| |
| 引用本文： | 李飞,余西龙,陈立红,张新宇.TDLAS测量甲烷／空气预混平面火焰温度和H2O浓度[J].气动实验与测量控制,2009(2):40-44. |
| |
| 作者姓名： | 李飞 余西龙 陈立红 张新宇 |
| |
| 作者单位： | 中国科学院力学研究所高温气体动力学实验室,北京100190 |
| |
| 基金项目： | 国家自然科学基金（10525212）和（10772188）资助项目
致谢：笔者所使用的平面炉为力学所俞刚研究员提供;在实验过程和该文写作中,吴宝根研究员提出很多很好的建议,在此表示谢意. |
| |
| 摘 要： | 基于可调谐二极管激光器吸收光谱技术（YDLAS）建立了温度和H2O浓度测量系统，利用光谱数据库Hitran2004在1393nm附近选择了在500～1300K有很高测温灵敏度的两条水吸收线：7168．437cm^-1，7185．597cm^-1。在1kHz的扫描频率下，利用直接吸收-扫描波长法对甲烷／空气预混平面火焰进行测量，并进行边界层修正，与热电偶的对比结果显示，在温度区间1100～1350K，两者最大相差80K（6．7％）；水蒸气组分浓度与计算值平均相差小于0．02（10％）．
|
| 关 键 词： | TDLAS 温度测量 浓度测量 预混平面火焰 光谱数据库 |
Temperature and water vapour concentration measurements of CH4/Air premixed flat flame based on TDLAS |
| |
| Authors: | LI Fei YU Xi-long CHEN Li-hong ZHANG Xin-yu |
| |
| Institution: | (Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China) |
| |
| Abstract: | A sensor based on tunable diode laser absorption spectroscopy （TDLAS） was constructed for temperature and water vapor concentration measurement. Absorption lines were selected and analysed using spectrum database Hitran2004. Two fiber-coupled near infrared distributed feedback lasers was used to probe two water vapor absorption features （7168.437 cm^-1 and 7185. 597 cm^- 1 ） near 1393nm which has high sensitivity of temperature measurement in 500 - 1300K. Successful experiments were performed in a CH4/Air premixed flat flame burner using direct absorption wavelength scanned method at a 1kHz scan rate. Because of the cooler shear layer in the flat flame, mixing layer theory was applied to correct TDLAS results. Comparison with thermoeouple measurements,the max difference of both methods is less than 80K （6.7%）. Comparison with calculation, the average water mole fraction difference is less than 0.02（ 10% ）. |
| |
| Keywords: | TDLAS temperatune measurement concentration measurement premixed flat flame spectrum database |
| 本文献已被 维普 等数据库收录！ |
