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

    • Construction and Study of Ammonia/Hydrogen/Diesel Tri-Fuel Combustion Mechanism
    DOI：10.13949/j.cnki.nrjgc.2024.06.006
    Key Words:ammonia/hydrogen/diesel  combustion mechanism  ignition delaytime  laminar flame speed  jet stirred reactor oxidation
    Author NameAffiliationE-mail
    YUAN Guocun Yunnan Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 1637874131@qq.com 
    LIU Shaohua* Yunnan Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China liushaohua183@126.com 
    SHEN Lizhong Yunnan Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 594699661@qq.com 
    BI Yuhua Yunnan Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 815569621@qq.com 
    LEI Jilin Yunnan Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China leijilin@sina.com 
    PENG Yiyuan Yunnan Filter Environment Protection S. &
    T. Co.， Ltd.， Kunming 650300， China     		ypp@yunneidongli.com 
    Hits: 1218
    Download times: 449
    Abstract:The ammonia/hydrogen/diesel （AHD） tri-fuel combustion mechanism， consisting of 70 species and 392 steps of elementary reactions， was constructed using the Reaction Workbench module in Chemkin software. Chemkin software was utilized to verify the chemical kinetics of the AHD mechanism， and the combustion process and emission under different fuel combustion modes of the engine were also compared and verified by coupling the AHD mechanism with a computational fluid dynamics （CFD） model. The results show that the predicted values of the AHD mechanism for the ignition delay time， laminar flame propagation speed， and the change of the concentration of the oxidized key components of ammonia， hydrogen， and diesel fuel in the jet stirred reactor （JSR） match well with the experimental results. And the average errors are within one order of magnitude. Through the coupling of the CFD model and AHD mechanism， the engine combustion process and emission under the three combustion modes of diesel fuel only， ammonia/diesel fuel， and ammonia/hydrogen/diesel fuel， can be compared and validated under different fuel combustion modes. The simulated values of the engine in-cylinder pressure and the heat release rate under the three combustion modes are in good agreement with the trend of the experimental results， and the maximum errors are all within 10%. Under the rated operating conditions （1 800 r/min）， with the increase of hydrogen energy ratio， the ignition delay period is shortened， the combustion rate is accelerated， the CO and hydrogencarbon（HC） emissions gradually decrease， and the NOx emissions tend to increase.
    View Full Text  View/Add Comment  Download reader