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Study on dynamic characteristics of intake system and combustion of controllable intake swirl diesel engine

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  • Wang, Guixin
  • Yu, Wenbin
  • Li, Xiaobo
  • Su, Yanpan
  • Yang, Rui
  • Wu, Wentao

Abstract

This paper investigated the intake flow field of a controllable intake swirl diesel engine using computational fluid dynamics (CFD) methodology. It can be observed that the variation of the intake swirl with the opening of the intake baffle shows the two-stage characteristics, while the baffle opening angle of 48° is as a cut-off point. Through the comprehensive analysis of the influence of valve lift and baffle opening angle on flow coefficient, it is concluded that the influence of valve lift on flow coefficient is more sensitive. A mathematical method is used to fit the formula which can calculate the key characteristics of the controllable intake swirl diesel engine. Meanwhile the influence of the swirl ratio on combustion characteristics is investigated. It can be concluded that the swirl ratio has greater influence on the power performance of the diesel engine. When the swirl ratio increases from 0.4 to 1.2, the power performance is increased by 5.79%, and the fuel consumption was also improved. Finally, according to the actual structure of the intake system of diesel engine, a steady-state intake flow test bed was established to verify the accuracy of CFD study of the intake system.

Suggested Citation

  • Wang, Guixin & Yu, Wenbin & Li, Xiaobo & Su, Yanpan & Yang, Rui & Wu, Wentao, 2019. "Study on dynamic characteristics of intake system and combustion of controllable intake swirl diesel engine," Energy, Elsevier, vol. 180(C), pages 1008-1018.
    • Handle: RePEc:eee:energy:v:180:y:2019:i:c:p:1008-1018
    DOI: 10.1016/j.energy.2019.05.162
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    References listed on IDEAS

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    1. Basha, Syed Ameer & Raja Gopal, K., 2009. "In-cylinder fluid flow, turbulence and spray models--A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1620-1627, August.
    2. Tianyou Wang & Daming Liu & Gangde Wang & Bingqian Tan & Zhijun Peng, 2015. "Effects of Variable Valve Lift on In-Cylinder Air Motion," Energies, MDPI, vol. 8(12), pages 1-18, December.
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