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    Combustion of methanol in diesel engine using diethyl ether as ignition enhancer

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    Type
    Conference Paper
    Authors
    Vallinayagam, R.
    Vedharaj, S.
    Jaasim, Mohammed
    Hong, G. I.
    Sarathy, Mani cc
    Dibble, Robert W. cc
    KAUST Department
    King Abdullah University of Science and Technology, Clean Combustion Research Centre, Thuwal, 23900, Saudi Arabia
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Chemical Engineering Program
    Clean Combustion Research Center
    Date
    2017-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/666775
    
    Metadata
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    Abstract
    In this study, combustion of methanol in diesel engine is investigated using diethyl ether (DEE) as an ignition enhancer. Both experimental and numerical studies were performed and the results are compared with baseline diesel fuel. DEE has higher derived cetane number (DCN) of 139 when compared to methanol (DCN=8). Two blends DM75 (DEE 75% v/v + Methanol 25% v/v) and DM50 (DEE 50% v/v+ Methanol 50% v/v) were tested in diesel engine. For the same fuel injection timing of -20 CAD (aTDC), the intake air pressure is boosted to 1.75 bar to support auto ignition of DM mixtures. The peak cylinder pressures were comparable for diesel and DM75, while DM50 exhibited lower pressure with delayed start of combustion (SOC). Full cycle numerical simulations were performed using 3-D computational fluid dynamics (CFD) code (CONVERGE). DM75 and diesel showed similar flame liftoff and combustion phasing, and the numerical simulation results matched with the experimental results. Diesel ignited at a rich equivalence ratio range of 2-3, whereas DM75 and DM50 ignited at an equivalence ratio range of 1.0-1.5 and 0.3-0.6, respectively. The DM50 blend was found to exhibit stratified combustion with low in-cylinder and exhaust temperature when compared to DM75 and diesel.
    Sponsors
    The work was supported by competitive research funding from King Abdullah University of Science and Technology (KASUT) under Clean Combustion Research Center’s Future Fuel’s program. The simulations were performed using clusters in KAUST IT research computing facility. We thank our research technician Mr. Adrian Ichim, for his support in carrying out the engine experiments at KAUST engine lab.
    Publisher
    Combustion Institute
    Conference/Event name
    11th Asia-Pacific Conference on Combustion, ASPACC 2017
    Additional Links
    https://research.kaust.edu.sa/en/publications/combustion-of-methanol-in-diesel-engine-using-diethyl-ether-as-ig
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center

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