预混火焰诱导里克管热声振荡实验

罗列朝; 李挺; 邓江革; 赵润洲; 王晋魁

doi:10.13224/j.cnki.jasp.20220284

预混火焰诱导里克管热声振荡实验

doi: 10.13224/j.cnki.jasp.20220284

北京航空航天大学能源与动力工程学院，北京 100191

基金项目: 航空发动机气动热力国家级重点实验室基金

详细信息

作者简介:
罗列朝（1994-），男，博士生，主要从事激光燃烧诊断方面的研究

通讯作者:
李挺（1981-），男，副教授、博士生导师，博士，主要从事发动机燃烧先进诊断技术等方面的研究。E-mail: li1329@buaa.edu.cn

中图分类号: V219；TK311
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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-29
- 网络出版日期: 2022-09-07

Experiment of thermoacoustic oscillation phenomenon in Rijke tube induced by premixed flame

School of Energy and Power Engineering，Beihang University，Beijing 100191，China

摘要

摘要:
为了探究热声振荡现象中各物理量的变化规律，采用单端可调谐激光吸收光谱技术对火焰的温度进行了测量，测量频率为5 kHz，揭示了热声振荡中温度的变化规律。在里克管中，温度以大约230 Hz的频率规律性变化，变化频率与里克管的本征频率接近。里克管出口处的静压监测表明静压与温度在同一频率变化。此外，采用高速相机对火焰化学自发光进行了测量，火焰化学发光强度及发光面积在静压的影响下，也在周期性波动。温度、静压、化学发光强度三者波动频率保持一致。
- 激光吸收光谱 /
- 热声振荡 /
- 温度测量 /
- 熵波 /
- 化学发光强度
Abstract:
In order to investigate the properties of various physical parameters in the thermoacoustic oscillation in the Rijke Tube, the flame temperature was measured by single-end tunable diode laser absorption spectroscopy (TDLAS), at the TDLAS measurement frequency of 5 kHz, which effectively revealed the properties of temperature in thermoacoustic oscillation. Result showed that, the temperature varied regularly at approximate 230 Hz, which coincided with the eigen frequency of the Rijke tube. The static pressure at the exit of the Rijke tube fluctuated at the same frequency. Besides, the flame chemiluminescence intensity was captured by the high-speed camera. The result showed that the flame chemiluminescence intensity area also fluctuated periodically due to the variation of static pressure. The frequencies of temperature, static pressure and chemiluminescence intensity were consistent with each other.
- laser absorption spectrum /
- thermoacoustic oscillation /
- temperature measurement /
- entropy wave /
- chemiluminescence intensity

HTML

图 1 吸收光谱测量示意图

Figure 1. Schematic diagram of absorption spectroscopy

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图 2 实验装置示意图

Figure 2. Scheme of experimental setup

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图 3 Y型光纤示意图

Figure 3. Schematic of Y-shape fiber

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图 4 吸收光谱图

Figure 4. Absorbance spectrum

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图 5 火焰温度幅值变化及频率分布

Figure 5. Temperature variation of flame and its frequency distribution

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图 6 不同时刻的火焰化学发光强度

Figure 6. Measurements of flame chemiluminescence intensity at different times

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图 7 火焰发光强度面积和里克管出口处的静压

Figure 7. Flame radiation intensity area and fluctuations of static pressure at exit of Rijke tube

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