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首页> 外文期刊>International journal of hydrogen energy >Lean-burn characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen at low engine speed conditions
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Lean-burn characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen at low engine speed conditions

机译：在低发动机速度条件下用氢气燃烧的涡轮增压的涡轮增压的倾斜特性

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摘要

Opposed rotary piston (ORP) engines have high power density and compact designs which meet the requirements of power sources of hybrid vehicles. Hydrogen applications to ORP engines can effectively decrease greenhouse gas emissions; however, hydrogen combustion in ORP engines around stoichiometric ratio generated large quantities of nitrogen oxides (NOx), especially for low engine speed conditions. Lean-burn as an effective method to decrease NOx emissions was adopted in this research. A 3D numerical simulation method was used to explore the effect of equivalence ratio (= 1) on combustion and NOx emission characteristics of this ORP engine fuelled with hydrogen. The results indicated that peak in-cylinder pressure increased with equivalence ratio for 1000 revolutions per minute (RPM); however, the value over the equivalence ratio of 0.9 was the maximum among 2000 RPM scenarios. The effect of equivalence ratio on heat release rates was greatly dependent on the engine speeds. Start of combustion over 1000 RPM engine speed was advanced with the increase of equivalence ratio; and it was the earliest over the equivalence ratio of 0.9 at 2000 RPM conditions. During the exhaust stroke, in-cylinder pressure of free discharge was much higher than atmosphere pressure, which significantly increased the pumping losses of exhaust stroke. Accumulated NOx emissions over the equivalence ratio of 0.9 reached the maximum value for given engine speeds; and the NOx emissions were almost zero for severe lean-burn (0.7) conditions. Engine power output decreased with the drop of equivalence ratio for 1000 and 2000 RPM engine speeds; indicated thermal efficiency over the equivalence ratio of 0.9 was the maximum at 2000 RPM engine speed. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：相对的旋转活塞（ORP）发动机具有高功率密度和紧凑的设计，其满足混合动力车辆的电源的要求。对ORP发动机的氢气应用可以有效降低温室气体排放;然而，在ORP发动机周围化学计量比中的氢燃烧产生大量氮氧化物（NOx），特别是对于低发动机速度条件。瘦燃烧作为减少NOx排放的有效方法在本研究中采用。 3D数值模拟方法用于探讨用氢气燃料的燃烧和NOx排放特性的等效比（<= 1）的效果。结果表明，峰值压力的峰值压力增加，每分钟1000转（RPM）增加了1000转;但是，对等效比为0.9的值是2000 rpm情景中的最大值。等效比对热释放速率的影响极大地取决于发动机速度。随着等效率的增加，超过1000rpm发动机速度的燃烧开头;它在2000 rpm条件下最早的等效比为0.9。在排气冲程期间，自由放电的缸内压力远高于大气压，这显着增加了排气冲程的泵送损耗。累计NOx排放量为0.9的等效率达到给定发动机速度的最大值;对于严重的稀燃（<0.7）条件，NOx排放几乎为零。发动机电源输出随着1000和2000 rpm发动机速度的等效比率降低;表明在0.9的等效比上的热效率为2000 rpm发动机速度的最大值。 （c）2020氢能源出版物LLC。 elsevier有限公司出版。保留所有权利。

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  • 来源
    《International journal of hydrogen energy》 |2021年第1期|1219-1233|共15页
  • 作者

    Gao Jianbing; Tian Guohong; Ma Chaochen; Zhang Yuanjian; Xing Shikai; Jenner Phil;

  • 作者单位

    Beijing Inst Technol Sch Mech Engn Beijing 10081 Peoples R China|Univ Surrey Dept Mech Engn Sci Guildford GU2 7XH Surrey England|Univ Leeds Inst Transport Studies Leeds LS2 9JT W Yorkshire England;

    Univ Surrey Dept Mech Engn Sci Guildford GU2 7XH Surrey England;

    Beijing Inst Technol Sch Mech Engn Beijing 10081 Peoples R China;

    Univ Surrey Dept Mech Engn Sci Guildford GU2 7XH Surrey England;

    Hebei Normal Univ Sch Vocat & Tech Shijiazhuang 050024 Hebei Peoples R China;

    Enigma England Ltd West Malling ME19 5NX Kent England;

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

    Opposed rotary piston engines; Hydrogen fuel; Lean-burn; Combustion characteristics; NOx emissions;

    机译：相对的旋转活塞发动机;氢燃料;瘦燃烧;燃烧特征;NOx排放;

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