基于氢气/柴油RCCI燃烧的热效率与损失联合优化  

Combined optimization of thermal efficiency and exergy destruction for hydrogen/diesel reactivity controlled compression ignition (RCCI) combustion

作　　者：白金鹏 常亚超[1] 李耀鹏[1] 贾明[1] BAI Jinpeng;CHANG Yachao;LI Yaopeng;JIA Ming(School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《大连理工大学学报》2023年第1期32-40,共9页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(51961135105,91641117)。

摘　　要：随着石油资源的匮乏、排放法规的日益严苛以及碳达峰、碳中和目标的提出,内燃机急需实现高效清洁燃烧,所以可再生无碳清洁燃料氢气与高效低排放燃烧模式反应活性控制压燃(RCCI)逐渐成为研究热点.通过将KIVA-3V程序与非支配排序遗传算法(NSGA-Ⅱ)耦合,对氢气/柴油RCCI燃烧进行了参数优化,以实现等效指示燃油消耗率(EISFC)与[火用]损失的最小化,确定了不同初始参数对[火用]损失的影响规律及作用机理.结果表明,由于等效指示燃油消耗率随着燃烧温度非单调性变化,等效指示燃油消耗率和[火用]损失之间呈现明显的此消彼长关系,所以很难同时实现等效指示燃油消耗率和[火用]损失的最小化.基于化学反应路径、燃烧温度与燃烧持续期对[火用]损失的影响,提高预混能量比与柴油第一次喷射比例可以有效降低[火用]损失.With the shortage of petroleum resources, the increasingly stringent emission regulations and the proposal of the goal of carbon peak and carbon neutrality, the internal combustion engine urgently needs to achieve efficient and clean combustion. Therefore, the renewable carbon-free clean fuel hydrogen and the high-efficiency and low emission combustion mode reactivity controlled compression ignition(RCCI) have gradually become research hotspots. So the operating parameters are optimized for hydrogen/diesel RCCI combustion by coupling the KIVA-3V code with the non-dominated sorting genetic algorithm-Ⅱ(NSGA-Ⅱ). And the goal of optimization is to minimize both equivalent indicated specific fuel consumption(EISFC) and exergy destruction. Then, the influence law and causes of different initial parameters on exergy destruction are determined. The results indicate that EISFC and exergy destruction show an obvious trade-off relationship, which means that it is difficult to minimize EISFC and exergy destruction simultaneously. This is due to the nonmonotonic variation of EISFC with the combustion temperature. Based on the influence of chemical reaction path, combustion temperature and combustion duration on exergy destruction, increasing the premixed energy ratio and the proportion of the first injection of diesel can reduce exergy destruction.

关 键 词：热力学第二定律 [火用]损失 氢气/柴油 反应活性控制压燃(RCCI)燃烧 优化 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]