米勒循环与EGR耦合对增压柴油机性能的影响

韩雷; 任洪娟

doi:10.12299/jsues.22-0007

米勒循环与EGR耦合对增压柴油机性能的影响

doi: 10.12299/jsues.22-0007

韩雷,
任洪娟^,

上海工程技术大学机械与汽车工程学院, 上海 201620

详细信息

作者简介:
韩雷：韩　雷（1996−），男，在读硕士，研究方向为内燃机节能减排. E-mail：ray_h1112@163.com

通讯作者:
任洪娟（1978−），女，副教授，博士，研究方向为汽车动力系统设计与节能减排. E-mail：ren-hongjuan@163.com

中图分类号: TK421
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- 被引次数: 0
出版历程
- 收稿日期: 2022-01-07
- 刊出日期: 2022-06-30

Influence of Miller cycle and EGR coupling on performance of turbocharged diesel engine

HAN Lei,
REN Hongjuan^,

School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

摘要

摘要:
以某6缸四冲程两级增压船用柴油机为研究对象，建立两级增压柴油机米勒循环与废气再循环(Exhaust Gas Recirculation, EGR)耦合仿真模型，研究米勒循环和EGR耦合对两级增压柴油机燃油消耗率和NO_x排放的影响. 结果表明，当米勒度为−40°CA时，燃油消耗率相对原机降低3.5%，NO_x排放相对原机降低25.5%；EGR率为30%时，燃油消耗率相对原机增加5.0%，NO_x排放降低98.7%；当米勒度为−30°CA与EGR率为20%时，燃油消耗率相对原机仅增加0.1%，NO_x排放降低92.7%.
- 米勒循环 /
- 废气再循环 /
- 船用柴油机 /
- 两级涡轮增压 /
- NO_x排放
Abstract:
Taking a 6-cylinder, four-stroke, two-stage turbocharged marine diesel engine as the research object, the coupled simulation model of Miller cycle and exhaust gas recirculation (EGR) of two-stage turbocharged diesel engine was established, and the influences of Miller cycle and EGR coupling on the fuel consumption rate and NO_x emissions of the two-stage turbocharged diesel engine were studied. The results show that when the Miller timing is −40°CA, compared with the original engine, the fuel consumption rate is reduced by 3.5%, and the NO_x emissions are reduced by 25.5%. When the EGR rate is 30%, the fuel consumption rate is increased by 5.0% and NO_x emissions are reduced by 98.7%. When the Miller timing is −30°CA and EGR rate is 20%, compared with the original engine, the fuel consumption rate is only increased by 0.1% and NO_x emissions are reduced by 92.7%.
- Miller cycle /
- exhaust gas recirculation (EGR) /
- marine diesel engine /
- two-stage turbocharging /
- NO_x emissions

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图 1 试验系统布置

Figure 1. Test system layout

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图 2 船用柴油机推进特性曲线

Figure 2. Marine diesel engine propulsion characteristic curve

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图 3 两级增压柴油机仿真模型（带EGR）

Figure 3. Simulation model of two-stage turbocharged diesel engine with EGR

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图 4 米勒度方案

Figure 4. Scheme of Miller timing

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图 5 柴油机性能随米勒度的变化规律

Figure 5. Variation of diesel engine performance with Miller timing

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图 6 柴油机性能随EGR率的变化规律

Figure 6. Variation of diesel engine performance with EGR rates

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表 1 柴油机主要技术参数

Table 1. Main technical parameters of diesel engine

参数	数值
机型	四冲程，直列6缸
气缸直径/mm	170
行程/mm	222
连杆长度/mm	379
排量/L	30.22
压缩比	15.5:1
点火顺序	1→5→3→6→2→4
最大爆发压力/MPa	25
低压级增压器转速/(r·min⁻¹)	≤75000
高压级增压器转速/(r·min⁻¹)	≤80000
中冷后空气温度/℃	45 ± 5
喷孔数	8
喷孔直径/mm	0.3

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表 2 主要试验数据

Table 2. Main experimental datas

参数	数值
功率/kW	507.7
转速/(r·min⁻¹)	1365
转矩/(N·m)	3557.2
燃油消耗率/(g·(kW·h)⁻¹)	213.2
进气流量/(kg·h⁻¹)	4612.6
进气温度/℃	28.7
NO_x排放量/(g·(kW·h)⁻¹)	15.3

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参考文献(22)

[1]	刘圣华, 周龙保. 内燃机学[M]. 4版. 北京: 机械工业出版社, 2017.
[2]	KALGHATGI G. Is it really the end of internal combustion engines and petroleum in transport?[J] . Applied Energy,2018,225:965 − 974. doi: 10.1016/j.apenergy.2018.05.076
[3]	MITO M T, TEAMAH M A, EL-MAGHLANY W M, et al. Utilizing the scavenge air cooling in improving the performance of marine diesel engine waste heat recovery systems[J] . Energy,2018,142:264 − 276. doi: 10.1016/j.energy.2017.10.039
[4]	RAJAK U, CHAURASIYA P K, NASHINE P, et al. Financial assessment, performance and emission analysis of Moringa oleifera and Jatropha curcas methyl ester fuel blends in a single-cylinder diesel engine[J] . Energy Conversion and Management,2020,224:113362. doi: 10.1016/j.enconman.2020.113362
[5]	XIE Y K, LI Y Y, ZHAO Z C, et al. Microsimulation of electric vehicle energy consumption and driving range[J] . Applied Energy,2020,267:115081. doi: 10.1016/j.apenergy.2020.115081
[6]	LI Y Y, WANG P, WANG S Q, et al. Quantitative investigation of the effects of CR, EGR and spark timing strategies on performance, combustion and NO_x emissions characteristics of a heavy-duty natural gas engine fueled with 99% methane content[J] . Fuel,2019,255:115803. doi: 10.1016/j.fuel.2019.115803
[7]	李先南, 黄立, 张文正, 等. 两级增压对船用柴油机性能影响的试验[J] . 内燃机学报,2020,38(2):104 − 109.
[8]	刘宏杰. EGR结合米勒循环降低二冲程柴油机氮氧化物排放的研究[D]. 上海: 上海交通大学, 2016.
[9]	刘辰朋, 桂勇, 刘腾, 等. EGR率对船用低速柴油机缸内燃烧影响的仿真研究[J] . 船舶工程,2019,41(S1):154 − 157.
[10]	汪齐富. 船用柴油机米勒循环可调二级涡轮增压系统的研究[D]. 上海: 上海交通大学, 2012.
[11]	STONE R. Introduction to internal combustion engines[M]. London: Macmillan, 1985.
[12]	GUAN W, PEDROZO V B, ZHAO H, et al. Miller cycle combined with exhaust gas recirculation and post–fuel injection for emissions and exhaust gas temperature control of a heavy-duty diesel engine[J] . International Journal of Engine Research,2020,21(8):1381 − 1397. doi: 10.1177/1468087419830019
[13]	刘秋颖. 柴油机两级涡轮增压系统选型与匹配[D]. 上海: 上海交通大学, 2011.
[14]	刘博. 柴油机可调二级涡轮增压系统研究[D]. 上海: 上海交通大学, 2011.
[15]	陆家祥. 柴油机涡轮增压技术[M]. 2版. 北京: 机械工业出版社, 2018.
[16]	WANG P, HU Z L, SHI L, et al. Experimental investigation of the effects of Miller timing on performance, energy and exergy characteristics of two-stage turbocharged marine diesel engine[J] . Fuel,2021,292:120252. doi: 10.1016/j.fuel.2021.120252
[17]	成晓北, 浦涵, 杨灿. 可调二级增压结合EGR策略对米勒循环柴油机性能的影响[J] . 车用发动机,2019(4):1 − 7. doi: 10.3969/j.issn.1001-2222.2019.02.001
[18]	王文超, 姚安仁, 任家潮, 等. 高低压废气再循环系统(EGR)对进气道喷醇式柴油甲醇双燃料发动机的影响[J] . 环境科学学报,2021,41(11):4467 − 4476.
[19]	魏宇坤, 安士杰, 张志友. EGR率对船用柴油机中低负荷燃烧排放性能影响的仿真及试验研究[J] . 柴油机,2016,38(2):11 − 15. doi: 10.3969/j.issn.1001-4357.2016.02.003
[20]	史金钟, 鲍建军, 郭振杰, 等. EGR率和预喷时刻对柴油机NO_x和CO排放的影响[J] . 拖拉机与农用运输车,2017,44(3):49 − 51,58.
[21]	孙跃东, 张振东. 增压中冷柴油机EGR排放特性试验研究[J] . 农业机械学报,2004(5):47 − 50. doi: 10.3969/j.issn.1000-1298.2004.05.013
[22]	WANG P, TANG X Y, SHI L, et al. Experimental investigation of the influences of Miller cycle combined with EGR on performance, energy and exergy characteristics of a four-stroke marine regulated two-stage turbocharged diesel engine[J] . Fuel,2021,300:120940. doi: 10.1016/j.fuel.2021.120940