Laser ignition of methane-air mixtures at high pressures

Kopecek H.; Maier H.; Reider G.; Winter F.; Wintner E.

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Laser ignition of methane-air mixtures at high pressures

机译：高压下甲烷-空气混合物的激光点火

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Laser induced plasma ignition of methane-air mixtures at initial pressures up to 4 MPa was investigated experimentally using nanosecond Nd:YAG-laser pulses at 1064, 532 and 355 nm. Variations of the focusing system yielded, independent of the laser wavelength, an optimum focal spot diameter of about 20 mum under the experimental conditions, indicating that small impurity particles provide the seeds for laser plasma generation. The minimum laser pulse energy needed for ignition (ranging from 8 to 15 mJ) decreased with increasing initial pressure and with increasing equivalence ratio in the mixture regime of phi = 0.91-0.56. Corresponding threshold intensities ranged from 10(10) to 10(11) W/cm(2). Evidence for a non-resonant breakdown mechanism was established. (C) 2003 Published by Elsevier Science Inc. [References: 9]

机译：使用纳秒级Nd：YAG激光脉冲在1064、532和355 nm处，实验研究了初始压力高达4 MPa时甲烷-空气混合物的激光诱导等离子体点火。在实验条件下，聚焦系统的变化与激光波长无关，产生的最佳焦点直径约为20微米，这表明小的杂质颗粒为产生激光等离子体提供了种子。在phi = 0.91-0.56的混合状态下，点火所需的最小激光脉冲能量（8至15 mJ）随初始压力的增加和当量比的增加而降低。相应的阈值强度范围从10（10）到10（11）W / cm（2）。建立了非共振击穿机制的证据。（C）2003年由Elsevier Science Inc.出版。[参考：9]

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《Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics》 |2003年第4期|共5页
作者
Kopecek H.; Maier H.; Reider G.; Winter F.; Wintner E.;
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正文语种 eng
中图分类流体力学;
关键词
Laser ignition; High pressure; Methane-air mixtures; Laser induced combustion; Laser induced plasma; Spark-ignition;

机译：激光点火;高压;甲烷-空气混合物;激光诱导的燃烧;激光诱导的等离子体;火花点火;

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1. Laser Ignition of Methane-Air Mixtures at High Pressures and Diagnostics [J] . Herbert Kopecek, Soren Charareh, Maximilian Lackner, Journal of Engineering for Gas Turbines and Power . 2005,第1期

机译：高压下甲烷-空气混合物的激光点火和诊断
2. Laser-induced ignition of methane-air mixtures at pressures up to 4 MPa [J] . Kopecek H., Lackner M., Winter F., Laser Physics: An International Journal devoted to Theoretical and Experimental Laser Research and Application . 2003,第11期

机译：激光诱导的甲烷-空气混合物点火压力高达4 MPa
3. Laser Spark Ignition of Premixed Methane-Air Mixtures: Parameter Measurements and Determination of Key Factors for Ultimate Ignition Results [J] . Xiaohui Li, Benjamin W. Smith, Nicolo Omenetto Applied Spectroscopy: Society for Applied Spectroscopy . 2014,第9期

机译：预混合甲烷-空气混合物的激光火花点火：参数测量和确定最终点火结果的关键因素
4. LASER IGNITION OF METHANE-AIR MIXTURES AT HIGH PRESSURES AND DIAGNOSTICS [C] . Herbert Kopecek, Soren Charareh, Max Lackner, Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components . 2003

机译：高压下甲烷气体混合物的激光点火和诊断
5. Ignition delay of non-premixed methane-air mixtures using Conditional Moment closure (CMC). [D] . El Sayed, Ahmad. 2007

机译：使用条件矩封闭（CMC）的非预混合甲烷-空气混合物的点火延迟。
6. Robust and ultralow-energy-threshold ignition of a lean mixture by an ultrashort-pulsed laser in the filamentation regime [O] . Hongwei Zang, Helong Li, Wei Zhang, 2021

机译：通过超薄脉冲激光在细丝状态下通过超短脉冲激光的鲁棒和超级能量阈值点火
7. Issues of possible ignitions of methane-air mixture in the mine due to the implementation of mechanoelectric and piezoelectric effects during coal mining [O] . S Mineev, S Makeiev, I Belikov, 2020

机译：由于在煤矿过程中实施机械电和压电效应，矿井中甲烷 - 空气混合物可能点火的问题
8. Laminar Flame Speeds of Methane-Air Mixtures under Reduced and Elevated Pressures. [R] . Egolfopoulos, F. N., Cho, P., Law, C. K. 1989

机译：降低和升高压力下的甲烷 - 空气混合物的层流火焰速度。

Laser ignition of methane-air mixtures at high pressures

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