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Experimental study of the influence of exhaust gas recirculation on heat transfer in the firedeck of a direct injection diesel engine

机译：直喷式柴油机尾舱废气再循环对传热影响的实验研究

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摘要

Emissions control is a key topic for internal combustion engine development. One of the most widespread technologies to reduce the formation of nitrogen oxides is the recirculation of exhaust gas to the engine intake. Besides, carbon dioxide emissions from internal combustion engines can be reduced by increasing engine efficiency. A relevant factor for engine efficiency is heat rejection. The interaction between heat transfer and exhaust gas recirculation is not fully understood. In this paper, an experimental study is presented which aims to shed light on the influence of high pressure exhaust gas recirculation on heat transfer. Three operating points were analyzed. Heat flux was calculated at several locations of the firedeck from temperature measurements. The results showed that the influence of exhaust gas recirculation on heat transfer was significant. Reductions of heat flux up to 18% were observed. The largest reduction was found in the area near the center of the firedeck. To contextualize the findings in the framework of emissions reduction, the trade-off between nitrogen oxides and carbon dioxide was assessed for all test points.
机译：排放控制是内燃机发展的关键主题。减少氮氧化物形成的最广泛的技术之一是将废气再循环至发动机进气口。此外，可以通过提高发动机效率来减少内燃机的二氧化碳排放。发动机效率的一个重要因素是散热。传热和废气再循环之间的相互作用还没有被完全理解。在本文中，进行了一项实验研究，旨在阐明高压排气再循环对传热的影响。分析了三个工作点。根据温度测量结果计算出甲板上几个位置的热通量。结果表明，废气再循环对传热的影响是显着的。观察到热通量减少高达18％。最大的减少量是在甲板中心附近的区域。为了在减少排放的框架中结合研究结果，对所有测试点的氮氧化物和二氧化碳之间的权衡进行了评估。

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  • 来源
    《Energy Conversion & Management》 |2017年第12期|304-312|共9页
  • 作者

    Torregrosa A. J.; Broatch A.; Olmeda P.; Salvador-Iborra J.; Warey A.;

  • 作者单位

    Univ Politecn Valencia, CMT Motores Term, Cami Vera S-N, E-46022 Valencia, Spain;

    Univ Politecn Valencia, CMT Motores Term, Cami Vera S-N, E-46022 Valencia, Spain;

    Univ Politecn Valencia, CMT Motores Term, Cami Vera S-N, E-46022 Valencia, Spain;

    Univ Politecn Valencia, CMT Motores Term, Cami Vera S-N, E-46022 Valencia, Spain;

    Gen Motors Global Res & Dev, Prop Syst Res Lab, Palmyra, IL USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    EGR; Heat transfer; CO2; Wall temperature; Thermocouple;

    机译：EGR;传热;CO2;壁温;热电偶;

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