“高低型双涡流室双缩口燃烧室”柴油机的高原排放特性
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TK421+.2

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军队预研项目(30110030402)


The Study on Performance of Emissions of Diesel Engines Equieped“the Combustion Chamber with a Higher and a Lower Reentrant Swirl Chamber”in High Altitude Areas
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    摘要:

    为了研究“高低型双涡流室双缩口燃烧室”柴油机的高原排放特性,运用AVL Fire对某高原柴油机改用“高低型双涡流室双缩口燃烧室”,并进行在海拔4500米的模拟燃烧。结果表明:相对于原型ω燃烧室,“高低型双涡流室双缩口燃烧室”能够同时降低NOx与SOOT排放量。为了进一步优化“高低型双涡流室双缩口燃烧室”的高原排放性能,设置了不同的不同径深比、不同的高低涡流室半径比与不同的喷油夹角,进行计算。结果表明:在计算范围内,随着该型燃烧室的最大径深比的增大,NOx排放量先下降后上升,SOOT排放量先上升后下降;随着高低涡流室半径比的增大柴油机的NOx排放量先降低后增大,而SOOT排放量一直下降;随着喷油夹角的升高,该燃烧室的NOx排放量先下降后上升再下降,最后再升高,呈W趋势,而SOOT排放量则先升高,后降低。为用于高海拔地区的“高低型双涡流室双缩口燃烧室”提供了设计参考。

    Abstract:

    To study the emissions performance of the “Combustion Chamber with a Higher and a Lower Reentrant Swirl Chamber”(hereafter called CCHL)in high altitude areas , AVL Fire was applied to switch CCHL to some diesel engine to simulate the combustion at altitude of 4500 meters. The results indicate that CCHL can produce less emissions of NOx and SOOT simultaneously than the original combustion chamber . In order to further optimize CCHL's emissions performance in high altitude areas, different depth-diameter ratios, different High-low swirl chamber's radius ratios and different Nozzle hole cone angels was set to simulate the combustion. And the results shows that, within the range of calculation, with the maximums of depth-diameter ratios increasing, NOx emissions went down first but then it went up, as SOOT emissions went up first but then it went down. Besides, with the maximums of High-low swirl chamber's radius ratio, NOx emissions went down first but then it went up, while the SOOT emissions has fallen. Furthermore, with the increasing of Nozzle hole cone angel, the NOx emissions went down first and then it went up but then it went down again, and finally went up, maintain a “w” trend, while the SOOT emissions first went up but then it went down. It provides a reference for the CCHL used in high altitude areas.

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李毅,苏石川,徐华平,等. “高低型双涡流室双缩口燃烧室”柴油机的高原排放特性[J]. 科学技术与工程, 2021, 21(11): 4452-4459.
Li Yi, Su Shichuan, Xu Huaping, et al. The Study on Performance of Emissions of Diesel Engines Equieped“the Combustion Chamber with a Higher and a Lower Reentrant Swirl Chamber”in High Altitude Areas[J]. Science Technology and Engineering,2021,21(11):4452-4459.

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  • 收稿日期:2020-07-12
  • 最后修改日期:2021-02-04
  • 录用日期:2020-12-03
  • 在线发布日期: 2021-05-17
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