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首页 > 过刊浏览>2024年第52卷第5期 >815-821. DOI:10.11908/j.issn.0253-374x.22282
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稀燃条件下甲烷-空气预混射流的着火特性
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作者:
作者单位:

同济大学 汽车学院，上海 201804

作者简介:

于 洋，博士生，主要研究方向为内燃机燃烧与排放控制。E-mail： 1710978@tongji.edu.cn

通讯作者:

吴志军，教授，博士生导师，工学博士，主要研究方向为内燃机燃烧与排放控制。 E-mail： zjwu@tongji.edu.cn

中图分类号:

TK464

基金项目:

国家自然科学基金（51576141）


Lean-Burn Ignition Characteristics of Methane/Air Premixed Jet
Author:
Affiliation:

School of Automotive Studies， Tongji University， Shanghai 201804， China

  • 摘要
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  • 参考文献 [14]
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    摘要:

    基于可控热氛围燃烧试验系统，探究射流当量比、射流速率和协流速率对甲烷-空气预混射流着火特性的影响。根据试验规律对天然气发动机稀薄燃烧的控制策略提出优化建议，以减少失火现象的发生。结果表明：随着协流温度的升高，甲烷-空气预混射流的稀燃极限降低而富燃极限升高，符合大多数碳氢燃料预混合气的着火界限分布规律。不同的射流速率和协流速率下均存在临界当量比，当低于临界当量比时，着火温度随射流当量比的升高而显著降低，当高于临界当量比时，着火温度趋于稳定。在较低的射流当量比工况（0.20 ~ 0.62）下，提高射流速率可以降低着火温度从而优化着火性能。

    Abstract:

    The effects of jet equivalence ratio， jet velocity， and co-flow velocity on the ignition characteristics of methane/air premixed jet were investigated on a controllable thermal-atmosphere combustion experimental system. According to the experimental law， the optimization suggestions for the lean-burn control strategy of natural gas engines were proposed to reduce the occurrence of the misfire. The results show that the lean limit of methane/air premixed jet decreases and the rich limit increases as co-flow temperature rises， which is consistent with the distribution of ignition limits of most hydrocarbon fuel premixes. Besides， there are different critical equivalence ratios at different jet velocities and co-flow velocities， below which the ignition temperature decreases sharply with the increase of jet equivalence ratio. Moreover， at a lower jet equivalence ratio （0.20~0.62）， the improvement in jet velocity can reduce the ignition temperature and optimize the ignition characteristics.

    参考文献
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于洋,瞿宗举,谢巍,邓俊,吴志军.稀燃条件下甲烷-空气预混射流的着火特性[J].同济大学学报(自然科学版),2024,52(5):815~821

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  • 收稿日期:2022-06-15
  • 在线发布日期: 2024-05-24
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