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    Lean partially premixed combustion investigation of methane direct-injection under different characteristic parameters

    , Article ASME 2013 Internal Combustion Engine Division Fall Technical Conference, ICEF 2013, Dearborn, MI, 13 October 2013 through 16 October 2013 ; Volume 1 , 2013 ; 9780791856093 (ISBN) Askari, O ; Metghalchi, H ; Hannani, S. K ; Hemmati, H ; Ebrahimi, R ; Sharif University of Technology
    American Society of Mechanical Engineers (ASME)  2013
    Abstract
    The effects of hydrogen addition, diluent addition, injection pressure, chamber pressure, chamber temperature and turbulence intensity on methane-air partially premixed turbulent combustion have been studied experimentally using a constant volume combustion chamber (CVCC). The fuel-air mixture was ignited by centrally located electrodes at given spark delay times of 1, 5, 40, 75 and 110 milliseconds. Experiments were performed for a wide range of hydrogen volumetric fractions (0% to 40%), exhaust gas recirculation (EGR) volumetric fractions (0% to 25% as a diluent), injection pressures (30-90 bar), chamber pressures (1-3 bar), chamber temperatures (298-432 K) and overall equivalence ratios... 

    Lean partially premixed combustion investigation of methane direct-injection under different characteristic parameters

    , Article Journal of Energy Resources Technology, Transactions of the ASME ; Vol. 136, issue. 2 , 2014 ; ISSN: 01950738 Askari, O ; Metghalchi, H ; Hannani, S. K ; Hemmati, H ; Ebrahimi, R ; Sharif University of Technology
    Abstract
    The effects of hydrogen addition, diluent addition, injection pressure, chamber pressure, chamber temperature and turbulence intensity on methane-air partially premixed turbulent combustion have been studied experimentally using a constant volume combustion chamber (CVCC). The fuel-air mixture was ignited by centrally located electrodes at given spark delay times of 1, 5, 40, 75, and 110 ms. Experiments were performed for a wide range of hydrogen volumetric fractions (0% to 40%), simulated diluent volumetric fractions (0% to 25% as a diluent), injection pressures (30-90 bar), chamber pressures (1-3 bar), chamber temperatures (298-432 K) and overall equivalence ratios of 0.6, 0.8, and 1.0....