• Home
  • About CICEE
  • Editorial Board
  • Publication Ethics
  • 中文

    • Simulation Study on the Effects of Combustion Chamber Structures on Reactivity Controlled Compression Ignition Engines Under Medium Loads
    DOI：10.13949/j.cnki.nrjgc.2024.01.003
    Key Words:reaction mechanism  separated swirl combustion system（SSCS）  lateral swirl combustion system（LSCS）  energy balance analysis  heat transfer analysis
    Author NameAffiliationPostcode
    LANG Maochun National Key Laboratory of Automobile Simulation and Control， Jilin University， Changchun 130022， China 130022
    SU Yan National Key Laboratory of Automobile Simulation and Control， Jilin University， Changchun 130022， China 130022
    WANG Yaodong National Key Laboratory of Automobile Simulation and Control， Jilin University， Changchun 130022， China 130022
    SHEN Bo National Key Laboratory of Automobile Simulation and Control， Jilin University， Changchun 130022， China 130022
    ZHANG Yulin National Key Laboratory of Automobile Simulation and Control， Jilin University， Changchun 130022， China 130022
    QIAN Dingchao National Key Laboratory of Automobile Vibration Noise and Safety Control Comprehensive Technology， Changchun 130000， China 130000
    Hits: 1210
    Download times: 572
    Abstract:A multi-component gasoline/diesel surrogate mechanism which includes heavy diesel components was constructed through mechanism coupling and automatic optimization. The mechanism was then coupled with CONVERGE to create three-dimensional computational models， including the omega combustion system （OMECS）， separated swirl combustion system （SSCS） and lateral swirl combustion system （LSCS）. The study focused on examining the impacts of different combustion chambers on the reactivity controlled compression ignition （RCCI） engine under medium load and high premix ratio conditions. The results show that compared to the OMECS combustion chamber， the SSCS and LSCS combustion chambers exhibit an increase in the indicated thermal efficiencies of 4.65% and 3.51%， respectively， while other emissions， except for NOx， are reduced. Energy balance and heat transfer analysis revealed a decrease in heat transfer loss， combustion loss and exhaust loss. The optimization mechanism for the new combustion chamber in RCCI combustion mode differs from that of pure diesel combustion. The influence of wall spray interaction is not significant， while the unique structure and organization of the cylinder airflow （such as the separation combustion chamber of the SSCS combustion chamber and the small size vortex on both sides of the convex edge of the LSCS combustion chamber） weaken the heat transfer more than the enhancement of the surface volume ratio and the increase of the cylinder temperature on the heat transfer. Overall， the SSCS and LSCS combustion chambers consistently demonstrate higher indicated thermal efficiencies compared to the original chamber under all second starts of injection （SOI）.
    View Full Text  View/Add Comment  Download reader