Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation

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Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation

更新时间：2025-07-09

- Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation
- Vol. 43, Issue 5, Pages: 22-25(2009)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK42
- Online First：10 May 2009，
  
  Published：2009
- 稿件说明：
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Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation[J]. 2009, 43(5): 22-25.
DOI：

Numerical Simulation of Combustion Process in a Spark-Ignition Engine Fuelled with Natural Gas-Hydrogen Blends Combined with Exhaust Gas Recirculation[J]. 2009, 43(5): 22-25. DOI：

摘要

基于AVL-FIRE软件

数值模拟了掺氢比为20%、不同当量比(0.9～1.4)、不同废气再循环率(0～0.25

指废气的质量分数)的情况下

天然气掺氢发动机缸内压力、温度、氮氧化合物随曲轴转角的变化规律及其三维空间分布.缸内压力的计算值与实测值达到很好的吻合

表明模拟计算能进行天然气掺氢发动机的燃烧分析.计算结果表明:当天然气掺氢发动机使用废气再循环(EGR)后

缸内温度、压力、放热量和NO质量分数都降低

NO出现的时刻推迟.废气再循环率大于15%时

NO质量分数降低的速度已不明显.使用EGR是降低NO排放最直接和最有效的手段.在过量空气系数1.1处

NO生成量最高.稀薄燃烧也是天然气掺氢发动机实现低NO排放的重要手段.

Abstract

The variations with the crankshaft rotation and 3-dimensional distribution of pressure

temperature

and NO in the cylinder of a natural gas-hydrogen engine were simulated with a hydrogen volume fraction of 20%

excess air ratios(0.9-1.4)

and exhaust gas recirculation(EGR)mass fractions(0-0.25)by AVL-FIRE. The predictions of the cylinder pressure agree well with the experimental data

indicating the feasibility of the simulation in the combustion analysis for natural gas-hydrogen engines. The calculation results show that the temperature and pressure in the cylinder

heat released

and the mass fraction of NO decrease

and NO occurs late. The decrease of NO is not obvious when EGR mass fraction is less than 0.15. The use of EGR can be the most effective method to reduce the emission of NO. The yield of NO is the greatest at the excess air ratio of 1.1. Lean mixture combustion is also an important approach to lowering NO emission from natural gas-hydrogen engines.

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references

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AKANSU S O,DULGER A,KAHRAMAN N, et al. Internal combustion engines fueled by natural gas-hydrogen mixtures[J]. International Journal of Hydrogen Energy,2004,29(4):1527-1539.

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LIU Bing,HUANG Zuohua,ZENG Ke,et al.Experimental investigation on emissions of a spark-ignition engine fuelled with hydrogen enriched natural gas[J]. Journal of Xi'an Jiaotong University,2008,42(2):245-246.

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