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    • Simulation Study on Performance of A Low Speed Methanol Engine
    DOI：10.13949/j.cnki.nrjgc.2023.04.001
    Key Words:methanol  low speed engine  diesel fuel pilot ignition  combustion  emission
    Author NameAffiliationE-mail
    XIA Qian* China Shipbuilding Power Engineering Institute Co.， Ltd.， Shanghai 201208， China
    Shanghai Engineering Research Center of Ocean Power， Shanghai 201208， China     		xq@cspi.net.cn 
    LIU Fenghua Hudong Heavy Machinery Co.， Ltd.， Shanghai 200129， China  
    PENG Hui CSSC–MES Diesel Co.， Ltd.， Shanghai 201306， China h.peng@shcmd.com.cn 
    QIAN Yuehua China Shipbuilding Power Engineering Institute Co.， Ltd.， Shanghai 201208， China qyh@cspi.net.cn 
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    Abstract:Based on a low speed diesel engine， the diesel in-cylinder combustion model was established with CONVERGE software， and the model calibration was carried out according to the test data. Based on the calibrated diesel combustion model， three methanol injectors and three diesel pilot injectors were installed in the cylinder head. Each methanol injector and each diesel pilot injector were installed at an angle of 30°. The combustion model of diesel pilot ignition methanol was established. Under 100% load， the effects of the size of methanol injection holes and the timing of diesel pilot injection on engine ignition and combustion process were studied. The results show that the peak firing pressure is similar to the diesel engine when the methanol injection duration is 25°. Under the condition of unchanged methanol injection timing， the overall engine performance decreases with the decrease of the advance angle of fuel injection timing， but the decrease range is small.
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