Effects of injector spray angle on combustion and emissions characteristics of a natural gas (NG)-diesel dual fuel engine based on CFD coupled with reduced chemical kinetic model
Effects of injector spray angle on combustion and emissions characteristics of a natural gas (NG)-diesel dual fuel engine based on CFD coupled with reduced chemical kinetic model
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基于CFD和简化化学动力学模型的喷油器喷雾角度对天然气（NG）-柴油双燃料发动机燃烧和排放特性的影响
DOI：
10.1016/j.apenergy.2018.10.040
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发表时间：
2019
期刊：
影响因子：
11.2
通讯作者：
JunShu
中科院分区：
文献类型：
--
作者：
JunShu
本研究应用计算流体力学(CFD)和简化化学动力学模型相结合的方法，研究了不同喷油器喷雾角度下的天然气-柴油双燃料发动机的燃烧过程和排放特性。通过天然气-柴油双燃料发动机缸内压力、放热率(HRR)和排放(氮氧化物、碳氢化合物、一氧化碳)的实测数据对模型进行了验证。利用验证后的CFD模型研究了天然气-柴油双燃料发动机在喷雾角度变化时的燃烧和排放的瞬时过程。结果表明，当喷雾角度从60°增大到140°时，气缸压力峰值增大，当喷雾角度继续增大到160°时，峰值压力略有减小。当喷雾角度从60°增大到12 0°时，除1000RPM和5 0%负荷外，起燃时间、CA5 0、10~5 0%燃烧持续期、CA90、5 0~90%燃烧持续期和10~90%燃烧持续期均呈下降趋势，喷雾角度从1 2 0°增加到1 60°时，起燃时间波动不大。当喷雾角度从6 0°增加到1 60°时， 的起燃时间和燃烧持续期基本保持平稳。当喷雾角度从60°增加到140°时，NOx排放量增加，而从140°继续增加到160°时，NOx排放量变化不大。然而，在1000RPM和100%负荷下，未燃烧的甲烷几乎不变。喷雾角度在120°~160°之间时，CO排放保持在较低水平。为改善NG-柴油双燃料发动机的燃烧和排放性能提供了直观的数据和理论指导。
In this research, the computational fluid dynamics (CFD) coupled with reduced chemical kinetic model was applied to study the combustion process and emissions characteristics of a NG-diesel dual fuel engine at various injector spray angles. The model was validated by measured data of in-cylinder pressure, heat release rate (HRR) and emissions (nitrogen oxide (NOx), hydrocarbons (HC), carbon monoxide (CO)) in the NG-diesel dual fuel engine. The validated CFD models were used to investigate the immediate process of combustion and emissions of NG-diesel dual fuel engine with the variation of spray angle. The results showed that the peak cylinder pressure increases as the spray angle increases from 60° to 140°, but slightly decreases if the spray angle continues to increase to 160°. Except for the condition of 1000 rpm and 50% load, the start of combustion (SOC), CA50, 10–50% combustion duration, CA90, 50–90% combustion duration and 10–90% combustion duration decrease as the spray angle increases from 60° to 120°, and keep minor fluctuations when the spray angle increases from 120° to 160°. The NOx emissions ascend when the spray angle increases from 60° to 140° and changes little if it continues to increase from 140° to 160°. Nevertheless, the unburned methane is almost unchangeable at 1000 rpm and 100% load. When the spray angle ranges between 120° and 160°, the CO emissions keep at a lower level. All these have provided visual data and theoretical guidance for improving the combustion and emissions performance of NG-diesel dual fuel engine.
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影响因子：
11.2
作者：
Jianqin Fu;Jing-ping Liu;Yong Wang;Banglin Deng;Yanping Yang;Ren-hua Feng;Jing Yang
通讯作者：
Jianqin Fu;Jing-ping Liu;Yong Wang;Banglin Deng;Yanping Yang;Ren-hua Feng;Jing Yang
预混稀薄燃烧天然气发动机燃烧不稳定性动态特性分析
影响因子：
11.2
作者：
Shun-Liang Ding;Richard J. Brown;Norbert Marwan;Xiu-Zhen Ma
通讯作者：
Xiu-Zhen Ma
影响因子：
11.2
作者：
Dezhi Zhou;Wenming Yang;Feiyang Zhao;Jing Li
通讯作者：
Dezhi Zhou;Wenming Yang;Feiyang Zhao;Jing Li
DOI：
10.4271/920579
发表时间：
1992-02
期刊：
SAE transactions
影响因子：
--
作者：
Manuel A. Gonzalez D.;Zhi W. Lian;Rolf D. Reitz
通讯作者：
Manuel A. Gonzalez D.;Zhi W. Lian;Rolf D. Reitz
影响因子：
6.4
作者：
Jing-ping Liu;Guohui Zhu;Jianqin Fu;Zhengxin Xu;Jun Yao;Zhangsong Zhan
通讯作者：
Jing-ping Liu;Guohui Zhu;Jianqin Fu;Zhengxin Xu;Jun Yao;Zhangsong Zhan