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    • Study on the Mixing Process of Diesel and Natural Gas in a Natural Gas/Diesel Dual-Fuel Engine
    DOI：
    Key Words:IC engine  natural gas  dual fuel injection  numerical simulation  in-cylinder direct injection
    Author NameAffiliation
    TAN Xiaoqiang，WANG Qian，HE Zhixia，ZHANG Zhourong，DAI Liming，HAN Dan 1.School of Energy and Power Engineering， Jiangsu University， Zhenjiang 212013， China；2.Institute for Energy Research， Jiangsu University， Zhenjiang 212013， China 
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    Abstract:Based on the AVL FIRE code， the simulation of injection and mixture of natural gas and diesel fuel in a natural gas engine with pilot injection was carried out to study its combustion and emission performance. The related turbulent model was verified by the bed test and then the characteristic parameters， such as orifice position， inclined angle and gas diesel over lapping angle were analyzed. Results show that the k-ε turbulent model is more suitable for simulating the dual fuel injection， and the larger the injection height， inclination angle and over lapping angle， the smaller SMD. In particular， using a large over lapping angle can obtain the best atomization effect. The relative nozzle position will decide the energy transfer between the fuel and gas jets， thus influencing the penetration distance of fuel and gas and the atomization effect.
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