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首页> 外文期刊>International journal of green energy >The effect of high-reactivity fuel injection parameters on combustion features and exhaust emission characteristics in a natural gas-diesel RCCI engine at part load condition
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The effect of high-reactivity fuel injection parameters on combustion features and exhaust emission characteristics in a natural gas-diesel RCCI engine at part load condition

机译：高反应性燃料喷射参数对天然气柴油RCCI发动机部分负荷条件下燃烧特性和废气排放特性的影响

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Current work investigates the effect of injection pressure and double injection of diesel fuel on combustion and emissions in a reactivity controlled compression ignition (RCCI) engine at part load condition with premixed natural gas via CFD (Computational Fluid Dynamic) simulation coupled with chemical kinetic mechanism. The results indicate that high injection pressure of diesel fuel injection improves combustion features, which consequently decreases the amount of unburned hydrocarbon (HC) and carbon monoxide (CO) emissions. On the other side, less stratified mixture can be achieved with double injection of diesel fuel within the cylinder, which results in incomplete combustion and great emissions at part load. Results demonstrate that proper distribution of diesel fuel and formation of stratified mixture within the cylinder improves combustion development in RCCI strategy and then reduces HC and CO emissions at part load condition.
机译：当前的工作是通过CFD（计算流体动力学）模拟和化学动力学机制，研究在预混合天然气的情况下，部分压力条件下，反应压力控制点火（RCCI）发动机中喷射压力和二次喷射柴油对燃烧和排放的影响。结果表明，柴油喷射的高喷射压力改善了燃烧性能，因此减少了未燃烧的碳氢化合物（HC）和一氧化碳（CO）的排放量。另一方面，通过在气缸内两次注入柴油燃料，可以减少分层的混合物，从而导致不完全燃烧并在部分负荷下产生大量排放。结果表明，柴油燃料的适当分配和气缸内分层混合物的形成可改善RCCI策略中的燃烧发展，然后在部分负载条件下减少HC和CO排放。

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