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Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines

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  • Wei, Shengli
  • Ji, Kunpeng
  • Leng, Xianyin
  • Wang, Feihu
  • Liu, Xin

Abstract

In order to make better air utilization in combustion chamber to improve the mixture quality, enhance combustion efficiency and reduce emissions, a new swirl chamber combustion system of DI (direct injection) diesel engines is proposed. The in-cylinder spray, mixture formation and combustion progresses are simulated and investigated at different nozzle angles with AVL-FIRE code. Results show that in the current combustion system, spray angle of 146° is the best on the aspect of mixture homogeneity among all the cases. NO mass fraction is the lowest at spray angle of 154°, while Soot mass fraction is the lowest at spray angle of 146°. At the initial stage of spray, the fuel/air equivalence ratio distribution was primarily controlled by the squish and swirl, while after ignition in expansion stroke, the combustion swirl and reverse squish had great impact on the in-cylinder temperature distribution. To sum up, the spray angle and air motion matching with the combustion chamber is a key factor on combustion process and emissions performance. Considering the emission performance, spray angle of 150° is a relatively better compromise in the new combustion system.

Suggested Citation

  • Wei, Shengli & Ji, Kunpeng & Leng, Xianyin & Wang, Feihu & Liu, Xin, 2014. "Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines," Energy, Elsevier, vol. 75(C), pages 289-294.
    • Handle: RePEc:eee:energy:v:75:y:2014:i:c:p:289-294
    DOI: 10.1016/j.energy.2014.07.076
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    References listed on IDEAS

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    1. Jaichandar, S. & Annamalai, K., 2013. "Combined impact of injection pressure and combustion chamber geometry on the performance of a biodiesel fueled diesel engine," Energy, Elsevier, vol. 55(C), pages 330-339.
    2. Jaichandar, S. & Annamalai, K., 2012. "Influences of re-entrant combustion chamber geometry on the performance of Pongamia biodiesel in a DI diesel engine," Energy, Elsevier, vol. 44(1), pages 633-640.
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    3. Fan, Baowei & Pan, Jianfeng & Yang, Wenming & Pan, Zhenhua & Bani, Stephen & Chen, Wei & He, Ren, 2017. "Combined effect of injection timing and injection angle on mixture formation and combustion process in a direct injection (DI) natural gas rotary engine," Energy, Elsevier, vol. 128(C), pages 519-530.
    4. Nazemi, M. & Shahbakhti, M., 2016. "Modeling and analysis of fuel injection parameters for combustion and performance of an RCCI engine," Applied Energy, Elsevier, vol. 165(C), pages 135-150.
    5. Zhang, Zhiqing & Wang, Su & Pan, Mingzhang & Lv, Junshuai & Lu, Kai & Ye, Yanshuai & Tan, Dongli, 2024. "Utilization of hydrogen-diesel blends for the improvements of a dual-fuel engine based on the improved Taguchi methodology," Energy, Elsevier, vol. 292(C).
    6. Xiao, Gang & Jia, Ming & Wang, Tianyou, 2016. "Large eddy simulation of n-heptane spray combustion in partially premixed combustion regime with linear eddy model," Energy, Elsevier, vol. 97(C), pages 20-35.
    7. Jeong Kuk Kim & Siljung Yeo & Jae-Hyuk Choi & Won-Ju Lee, 2024. "LPG, Gasoline, and Diesel Engines for Small Marine Vessels: A Comparative Analysis of Eco-Friendliness and Economic Feasibility," Energies, MDPI, vol. 17(2), pages 1-17, January.

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