动力工程专业英语大作业院系：能源与动动力工程学院指导老师： ###姓名： ###学号： #####专业班级： #####导师： ####2015年 12 月 27日武汉理工大学能源与动力工程学院Application of a multi-zone combustionmodel to investigate the NOx reductionpotential oftwo-stroke marine diesel engines using EGR Author:Raptotasios, SI (Raptotasios, Spiridon I.)[ 1 ] ; Sakellaridis, NF (Sakellaridis, Nikolaos F.)[ 1 ] ; Papagiannakis, RG (Papagiannakis, Roussos G.)[ 2 ] ;Hountalas, DT (Hountalas, Dimitrios T.)[ 1 ]DOI: 10.1016/j.apenergy.2014.12.041Acceptance Date： NOV 1 2015AbstractThe most promising solution for propulsion of marine vessels currently and for the near future is the two-stroke low-speed diesel engines. Despite its advantages, as far as specific fuel oil consumption, power density and reliability is concerned, it suffers from increased NOx emissions mainly because of its low rotational speed. But the upcoming NOx emission legislation (Tier III) in the marine sector requires considerable reduction of NOx emissions towards levels which have not yet been commercially achieved using primary methods. This creates new challenges for the development and application of innovative techniques that could reduce engine's NOx emissions with the lowest possible fuel penalty. This is important considering current and future fuel prices. The large size of the 2-stroke marine engine makes the use of experimental techniques, to investigate this potential, expensive and time consuming. Modelling can significantly contribute towards this effort and result to reduction of research and development cost. Among the most effective in-cylinder techniques for NOx reduction is EGR, a proven technology for smaller engines used in the transport sector. In the present study, it is investigated via modelling, the potential to reduce NOx emissions of two-stroke marine engines using EGR Despite the technological difficulties resulting mainly from the use of Heavy Fuel Oil (HFO), which makes the application of conventional EGR techniques difficult, it is worthwhile investigating the NOx reduction potential, since significant progress has been achieved towards the development of new EGR gas cooling techniques and scrubber technologies for removal of sulphur species from the exhaust gas. The present investigation makes use of an existing well validated multi-zone combustion model, initially developed for high-speed DI dieselengines. The model has been successfully applied in the past, to investigate heavy duty diesel engine NOx reduction via EGR, providing favourable results. Currently it is modified and applied on a two-stroke marine diesel engine using EGR. Model evaluation is based on experimental data acquired from theinternational literature, due to lack of experimental data for 2-stroke engines. The analysis of derived results reveals model's ability to predict both engine performance and NOx emissions but most important the ability to predict the overall effect of EGR on NOx emissions in a qualitatively correct way. The re the strong potential of EGR to control NOx emissions of 2-stroke engines with relatively compared to alternative techniques. (C) 2015 Elsevier Ltd. All rights reserved.KeyWords：Multi-zone combustion model; Exhaust Gas Recirculation; NOx emissions; Two-stroke low-speed diesel engine; Engine performance二冲程船用柴油机废气循环应用多区域燃烧模型研究氮氧化物减排的可能性摘要目前和不远的将来最有效的解决海洋船舶的方案是低速二冲程柴油机。

就燃油消耗率,功率密度和可靠性而言,它有优势，但由于较低的转速会加剧氮氧化物颗粒的形成。

但即将到来的氮氧化物排放立法(第三层)在海洋领域需要相当大的减少氮氧化物的排放对水平的主要方法尚未商业化实现使用。

创新技术的开发和利用,能减少发动机的氮氧化物排放最低的燃料处罚标准。

考虑燃油当前和未来的价格是很重要的。

大型二冲程柴油机使用实验技术去调查它的潜力，这既浪费金钱又浪费时间。

造型可以显著促进对这一努力和结果减少研究和开发成本。

最有效的缸内技术减少氮氧化物是苛刻的,小排量的成熟技术,用于在运输部门。

在目前的研究中,它是通过造型,调查的潜在减少氮氧化物排放二冲程船用引擎使用废气循环尽管技术产生的困难主要来自使用重油(高频振荡器),这使得传统的应用废气循环技术困难,值得调查氮氧化物还原电位,自取得重大进展向新的苛刻的气体冷却技术的发展和洗涤器技术去除废气的硫物种。

目前调查利用现有的验证分域燃烧模型,最初为高速DI 柴油机的开发。

模型已成功应用于过去,探讨重型柴油机氮氧化物减少通过废气循环技术提供有利的结果。

目前它被修改和应用二冲程船用柴油机使用苛刻的。

模型的评估是基于实验数据获得国际文学,由于缺乏实验数据为二冲程。

派生的分析结果揭示了模型预测发动机性能和氮氧化物排放的能力但最重要的是能够预测废气循环对氮氧化物排放的总体效果正确定性。

关键词：多区域燃烧模型；废气循环；氮氧化物颗粒；大型低速船用二冲程柴油机；发动机性能Analytical Framework to EvaluateEmission Control Systems for MarineEnginesAuthor:Jayaram, VaralakshmiAcceptance Date:2010Series:UC Riverside Electronic Theses and DissertationsDegree:Ph.D., Chemical and Environmental EngineeringUC RiversideAdvisor(s):Cocker, David RCommittee:Miller, J Wayne, Norbeck, JosephAbstractEmissions from marine diesel engines are mainly uncontrolled and affect regional airquality and health of people living near ports. Many emission control strategies areevolving to reduce these emissions and their impacts. This dissertation characterizes the effectiveness of new technologies for reducing NOx and PM2.5 emissions from a range of marine diesel engines. Researchers, regulators and policy makers require these characterizations to develop emission inventories and suitable mitigation strategies. KeyWords：marine diesel engines；emission；new technologies；mitigation strategies船用柴油机排放控制系统的分析框架摘要船用柴油机的排放主要是控制和影响港口附近居住的人区域空气质量和健康。