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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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  • Shu, Jun
  • Fu, Jianqin
  • Liu, Jingping
  • Ma, Yinjie
  • Wang, Shuqian
  • Deng, Banglin
  • Zeng, Dongjian

Abstract

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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  • Shu, Jun & Fu, Jianqin & Liu, Jingping & Ma, Yinjie & Wang, Shuqian & Deng, Banglin & Zeng, Dongjian, 2019. "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," Applied Energy, Elsevier, vol. 233, pages 182-195.
  • Handle: RePEc:eee:appene:v:233-234:y:2019:i::p:182-195
    DOI: 10.1016/j.apenergy.2018.10.040
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    4. Zandie, Mohammad & Ng, Hoon Kiat & Gan, Suyin & Muhamad Said, Mohd Farid & Cheng, Xinwei, 2022. "A comprehensive CFD study of the spray combustion, soot formation and emissions of ternary mixtures of diesel, biodiesel and gasoline under compression ignition engine-relevant conditions," Energy, Elsevier, vol. 260(C).
    5. Van Chien Pham & Jae-Hyuk Choi & Beom-Seok Rho & Jun-Soo Kim & Kyunam Park & Sang-Kyun Park & Van Vang Le & Won-Ju Lee, 2021. "A Numerical Study on the Combustion Process and Emission Characteristics of a Natural Gas-Diesel Dual-Fuel Marine Engine at Full Load," Energies, MDPI, vol. 14(5), pages 1-28, March.
    6. Motlagh, Tara Yazdani & Azadani, Leila N. & Yazdani, Kaveh, 2020. "Multi-objective optimization of diesel injection parameters in a natural gas/diesel reactivity controlled compression ignition engine," Applied Energy, Elsevier, vol. 279(C).
    7. Krishnamoorthi, M. & Sreedhara, S. & Prakash Duvvuri, Pavan, 2020. "Experimental, numerical and exergy analyses of a dual fuel combustion engine fuelled with syngas and biodiesel/diesel blends," Applied Energy, Elsevier, vol. 263(C).
    8. Fu, Jianqin & Deng, Banglin & Liu, Xiaoqiang & Shu, Jun & Xu, Ying & Liu, Jingping, 2020. "The experimental study on transient emissions and engine behaviors of a sporting motorcycle under World Motorcycle Test Cycle," Energy, Elsevier, vol. 211(C).
    9. Yang, Kailin & Wang, Zhongshu & Zhang, Kechao & Wang, Dan & Xie, Fangxi & Xu, Yun & Yang, Kaiqiang, 2023. "Impact of natural gas injection timing on the combustion and emissions performance of a dual-direct-injection diesel/natural gas engine," Energy, Elsevier, vol. 270(C).
    10. Shilong Zhao & Hui Xiao & Yafan Li, 2023. "Research on the Ignition Process and Flame Stabilization of a Combination of Step and Strut: Experimental and Numerical Study," Energies, MDPI, vol. 16(6), pages 1-16, March.

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