Effect of high reactive fuel injection advancement and hydrogen-biodiesel premix ratio on combustion, performance and emission of a CI engine under RCCI mode

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2024-11-15 DOI:10.1016/j.fuel.2024.133710

Parthasarathi Deb, Divyansh Singh, Mukund Kumar, Abhishek Paul

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引用次数: 0

Abstract

The combustion mode known as Reactivity Controlled Compression Ignition (RCCI) has the capability to enhance engine performance and reduce emissions through the utilization of both high-reactivity fuel (HRF) and low-reactivity fuel (LRF). However, the potential of controlling combustion phasing through HRF injection advancement and utilization of a Hydrogen-biodiesel premix remains relatively unexplored. This study investigates the influence of high reactive fuel injection advancement and Hydrogen-biodiesel premix ratio on the combustion, performance, and emissions of an RCCI engine. The HRF injection angles varied from 30°bTDC to 90°bTDC, whereas the premix ratio of Hydrogen and biodiesel varied from 10 % to 70 %. Results showed that the combustion stability improved with increasing HRF injection angle up to 70°bTDC. The hydrogen premix ratio could be raised to 60% in the same condition without hampering engine performance. The brake thermal efficiency was improved by 15 % with a 50 % premix ratio and 70°bTDC HRF injection advancement. At the same operating point, a 73 % reduction in NO_X emission, 85 % reduction in soot emission, 61 % reduction in CO emission, and 42 % reduction in UHC emission was also observed concerning base diesel CDC operation. Thus, HRF injection advancement was beneficial in extending the LRF range of the engine.

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高活性燃油喷射提前量和氢-生物柴油预混比对 RCCI 模式下 CI 发动机燃烧、性能和排放的影响

被称为反应控制压缩点火（RCCI）的燃烧模式能够通过利用高活性燃料（HRF）和低活性燃料（LRF）提高发动机性能并减少排放。然而，通过推进 HRF 喷射和利用氢-生物柴油预混料来控制燃烧相位的潜力仍相对较小。本研究探讨了高活性燃料喷射提前量和氢-生物柴油预混比例对 RCCI 发动机燃烧、性能和排放的影响。高活性燃料喷射角度从 30°bTDC 到 90°bTDC 不等，而氢气和生物柴油的预混比例从 10% 到 70% 不等。结果表明，随着 HRF 喷射角的增加，燃烧稳定性得到改善，最高可达 70°bTDC。在相同条件下，氢气预混比例可提高到 60%，而不会影响发动机性能。在预混比例为 50% 和 HRF 喷射提前角为 70°bTDC 的情况下，制动热效率提高了 15%。在相同的工作点上，与基础柴油 CDC 运行相比，氮氧化物排放量减少了 73%，烟尘排放量减少了 85%，一氧化碳排放量减少了 61%，UHC 排放量减少了 42%。因此，推进 HRF 喷射有利于延长发动机的 LRF 范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.