Numerical study of ducted fuel injection strategy for soot emissions reduction in a heavy-duty diesel engine

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS
Yanzhao An , Yuhan Zhang , Tao Chen , Minshuo Shi , Yuzhang Wang , Zhanwang Su , Yiqiang Pei
{"title":"Numerical study of ducted fuel injection strategy for soot emissions reduction in a heavy-duty diesel engine","authors":"Yanzhao An ,&nbsp;Yuhan Zhang ,&nbsp;Tao Chen ,&nbsp;Minshuo Shi ,&nbsp;Yuzhang Wang ,&nbsp;Zhanwang Su ,&nbsp;Yiqiang Pei","doi":"10.1016/j.applthermaleng.2024.125066","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the method of ducted fuel injection (DFI) technology to improve fuel–air mixing and reduce soot emissions in heavy-duty diesel engines, addressing critical challenges in sustainable combustion technology. While optical engine experiments have demonstrated DFI’s potential for emissions reduction, challenges arise when translating these results to actual diesel engines due to differences in design and operational conditions. Unlike previous optical engine experiments, this work evaluates DFI under real engine operating conditions through comprehensive numerical simulations. For the first time, the mechanisms of soot emission formation and control with DFI in a practical engine are elucidated. Results show that injection timing significantly affects engine performance, with the optimal timing for the original engine at −12° CA ATDC, achieving an indicated mean effective pressure (IMEP) of 16.55 bar and minimizing soot emissions (1.78 g/kWh). The engine with a directly installed duct (without optimization) improves early-stage combustion but extends later-stage combustion, reducing IMEP to 14.90 bar and increasing soot and CO emissions. By optimizing duct parameters—such as jet direction, number of ducts, and offset angle—we improve fuel–air distribution and in-cylinder airflow dynamics. Our findings indicate that this optimization not only slightly increases the IMEP of 16.56 bar but also significantly reduces soot emissions by 8.99 % and hydrocarbons (HC) emissions by 96.05 % compared to the original engine. These findings highlight the potential of DFI technology for effective emission control and sustainable engine performance, advancing its practical application in heavy-duty diesel engines.</div></div>","PeriodicalId":8201,"journal":{"name":"Applied Thermal Engineering","volume":"260 ","pages":"Article 125066"},"PeriodicalIF":6.1000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359431124027340","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0

Abstract

This study investigates the method of ducted fuel injection (DFI) technology to improve fuel–air mixing and reduce soot emissions in heavy-duty diesel engines, addressing critical challenges in sustainable combustion technology. While optical engine experiments have demonstrated DFI’s potential for emissions reduction, challenges arise when translating these results to actual diesel engines due to differences in design and operational conditions. Unlike previous optical engine experiments, this work evaluates DFI under real engine operating conditions through comprehensive numerical simulations. For the first time, the mechanisms of soot emission formation and control with DFI in a practical engine are elucidated. Results show that injection timing significantly affects engine performance, with the optimal timing for the original engine at −12° CA ATDC, achieving an indicated mean effective pressure (IMEP) of 16.55 bar and minimizing soot emissions (1.78 g/kWh). The engine with a directly installed duct (without optimization) improves early-stage combustion but extends later-stage combustion, reducing IMEP to 14.90 bar and increasing soot and CO emissions. By optimizing duct parameters—such as jet direction, number of ducts, and offset angle—we improve fuel–air distribution and in-cylinder airflow dynamics. Our findings indicate that this optimization not only slightly increases the IMEP of 16.56 bar but also significantly reduces soot emissions by 8.99 % and hydrocarbons (HC) emissions by 96.05 % compared to the original engine. These findings highlight the potential of DFI technology for effective emission control and sustainable engine performance, advancing its practical application in heavy-duty diesel engines.
重型柴油机导管式燃油喷射策略的数值研究
本研究探讨了导管燃油喷射(DFI)技术的方法,以改善重型柴油发动机的燃料-空气混合和减少烟尘排放,解决可持续燃烧技术的关键挑战。虽然光学发动机实验已经证明了DFI在减排方面的潜力,但由于设计和操作条件的差异,在将这些结果转化为实际柴油发动机时,存在一些挑战。与以往的光学发动机实验不同,本工作通过全面的数值模拟来评估真实发动机工作条件下的DFI。首次阐明了在实际发动机中采用DFI控制烟尘排放的机理。结果表明,喷油正时对发动机性能有显著影响,原始发动机在- 12°CA ATDC时的最佳喷油正时可实现16.55 bar的平均有效压力(IMEP),并将烟尘排放降至最低(1.78 g/kWh)。直接安装风道的发动机(未经优化)改善了早期燃烧,但延长了后期燃烧,将IMEP降至14.90 bar,增加了烟尘和CO排放。通过优化管道参数,如射流方向,管道数量和偏移角,我们改善燃料-空气分布和缸内气流动力学。结果表明,与原发动机相比,该优化方案不仅使IMEP小幅提高了16.56 bar,而且显著降低了8.99%的烟尘排放和96.05%的碳氢化合物(HC)排放。这些发现突出了DFI技术在有效控制排放和可持续发动机性能方面的潜力,推进了其在重型柴油发动机上的实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信