Theoretical investigation the effect of Low-Temperature reformed products of gasoline on engine combustion and emission at variable loads
Theoretical investigation the effect of Low-Temperature reformed products of gasoline on engine combustion and emission at variable loads
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DOI：
10.1016/j.fuel.2022.124154
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发表时间：
2022
期刊：
影响因子：
7.4
通讯作者：
Long Liu;Qun Cao;Yang Wang
中科院分区：
文献类型：
--
作者：
Long Liu;Qun Cao;Yang Wang
在重整温度为488 ~ 638 K的条件下，采用燃料外重整系统对汽油进行重整。并利用CONVERGE软件进行了数值模拟研究，研究了不同重整温度下的重整产物在不同负荷下对发动机燃烧和排放性能的影响。结果表明，重整温度对重整产物的组成有很大影响。随着重整温度的升高，汽油逐渐生成CH 4、C2 H4、CH 3CHO等物种，并伴随CO、CO2等产物。重整产物的加入使燃烧相位提前，降低了缸内压力和燃烧放热率，影响了缸内燃烧状态。同时，在中高负荷工况下，添加重整产物会降低尾气排放，但在低负荷工况下，排放会增加。因此，合理选择低温重整产物，可以使发动机在不同负荷条件下实现清洁高效的燃烧。
Gasoline was reformed by an external fuel reforming system at the reforming temperature from 488 K to 638 K. And the numerical simulation study was carried out using CONVERGE to study the effects of reformed products at different reforming temperatures on engine combustion and emission performance with different loads. The results showed that the reforming temperature has a great influence on the composition of the reformed products. With the increase of reforming temperature, gasoline gradually generated CH4, C2H4, CH3CHO and other species, accompanied by CO, CO2and other products. The addition of reformed products advanced the combustion phase, reduced the cylinder pressure and combustion heat release rate, and affected the combustion state in the cylinder. Meanwhile, the addition of reformed products would reduce the emission of exhaust gas under medium and high load conditions, but the emissions would increase under low load condition. Therefore, reasonable selection of low-temperature reformed products could make the engine achieve clean and efficient combustion under different load conditions.