
1. 江苏大学能源研究院
2. 中汽研汽车检验中心(常州)有限公司
3. 江苏大学能源与动力工程学院
Published:2025
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沈羽航, 赵凯, 杨康, et al. 柴油引燃天然气着火燃烧特性的可视化[J]. 2025, (4): 314-321.
沈羽航, 赵凯, 杨康, et al. 柴油引燃天然气着火燃烧特性的可视化[J]. 2025, (4): 314-321. DOI: 10.16236/j.cnki.nrjxb.202504036.
基于一外部加热的高温、高压定容燃烧弹系统,采用自然发光法对柴油引燃天然气预混气燃烧过程开展光学诊断测试,研究不同天然气能量替代率(ESR)、柴油喷射压力p
inj
以及柴油喷射质量m
inj
对引燃过程着火和燃烧特性的影响.结果表明:ESR增大使得甲烷-空气当量比增加,由于甲烷比热容比空气大,ESR增大对柴油着火起到促进作用;同时,氧含量下降使得ESR增大对柴油着火起到一个抑制作用.当柴油喷射质量较小时,ESR的增大对着火的抑制作用强于其对着火的促进作用;当柴油喷射质量较大时,则呈相反结果.随着ESR增大,浓碳烟的占比升高,但在柴油喷射压力为100 MPa、ESR为94%条件下存在一个浓碳烟占比高的阶段.当柴油喷射压力高于100 MPa时,柴油喷射压力对燃烧放热的增强作用减弱,甲烷被引燃量没有太大增加.在m
inj
为10 mg、p
inj
为80 MPa的喷射策略下,着火延迟期在ESR为94%~96%范围内呈很强的线性关系.
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