主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
Automobile Applied Technology

Automobile Applied Technology ›› 2026, Vol. 51 ›› Issue (5): 74-79.DOI: 10.16638/j.cnki.1671-7988.2026.005.015

• Testing and Experiment • Previous Articles    

The development of clean alternative fuels for internal combustion engines and the establishment of novel combustion modes have become critical technological pathways to alleviate the dual pressures of the energy crisis and environmental pollution. This paper investigates the impact of high-reactivity fuel blending ratios (D100、P20、P50) on reactivity-controlled compression ignition (RCCI) combustion using natural gas in a dual-fuel engine. Three-dimensional numerical simulations are conducted under operating conditions of 1 420 r/min speed, 405 Nm load, and 0.18 MPa intake pressure. The results demonstrate that increasing the polyoxymethylene dimethyl ethers (PODE) blending ratio significantly elevates the peak in-cylinder pressure, advances the phase of peak heat release rate, accelerates the reaction rate, and advances the combustion phasing. Owing to its higher cetane number and superior low-temperature oxidation activity, PODE blending markedly shortens the ignition delay period, intensifies reactivity stratification and equivalence ratio gradients, thereby accelerating flame propagation speed and reducing combustion duration. Regarding emissions, compared with D100, P50 reduces total hydrocarbon (THC) and CO emissions by 96.7% and 98.2%, respectively. However, NOX emissions exhibit anincreasing trend due to elevated combustion temperatures.

CHEN Hui, LU Shaoyuan, LIU Dongjin, HUANG Shouliao, LI Xiandong   

  1. School of Automotive Engineering, Liuzhou Polytechnic University
  • Published:2026-03-11
  • Contact: CHEN Hui

柴油掺混 PODE 对天然气活性可压燃 燃烧的影响

陈晖，卢绍源，刘东津，黄首燎，黎宪东   

  1. 柳州职业技术大学 汽车工程学院
  • 通讯作者: 陈晖
  • 作者简介:陈晖（1984－），男，硕士，教授，研究方向为内燃机节能与排放控制
  • 基金资助:
    广西自然科学基金面上项目（2023GXNSFAA026436）；柳州职业技术大学重大研究项目（2023KA07）

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Abstract: The development of clean alternative fuels for internal combustion engines and the establishment of novel combustion modes have become critical technological pathways to alleviate the dual pressures of the energy crisis and environmental pollution. This paper investigates the impact of high-reactivity fuel blending ratios (D100、P20、P50) on reactivity-controlled compression ignition (RCCI) combustion using natural gas in a dual-fuel engine. Three-dimensional numerical simulations are conducted under operating conditions of 1 420 r/min speed, 405 Nm load, and 0.18 MPa intake pressure. The results demonstrate that increasing the polyoxymethylene dimethyl ethers (PODE) blending ratio significantly elevates the peak in-cylinder pressure, advances the phase of peak heat release rate, accelerates the reaction rate, and advances the combustion phasing. Owing to its higher cetane number and superior low-temperature oxidation activity, PODE blending markedly shortens the ignition delay period, intensifies reactivity stratification and equivalence ratio gradients, thereby accelerating flame propagation speed and reducing combustion duration. Regarding emissions, compared with D100, P50 reduces total hydrocarbon (THC) and CO emissions by 96.7% and 98.2%, respectively. However, NOX emissions exhibit anincreasing trend due to elevated combustion temperatures.

Key words: PODE; natural gas; engine; reactivity-controlled compression ignition

摘要： 开发内燃机清洁替代燃料并构建新型燃烧模式已成为缓解能源危机与环境污染双重压 力的关键技术路径。文章基于一台双燃料发动机，采用三维数值模拟方法研究了在转速为 1 420 r/min、负荷为 405 Nm、进气压力为 0.18 MPa 工况下，高活性燃料掺混比例（D100、 P20、P50）对天然气活性可控压燃（RCCI）燃烧过程的影响。结果表明，随着聚甲氧基二甲 醚（PODE）掺混比例增加，缸内峰值压力显著提升，放热率峰值相位前移，燃烧反应速率加 快，燃烧重心提前。PODE 具有更高的十六烷值及更优的低温氧化活性，其掺入柴油后显著 缩短着火滞燃期，强化活性分层与当量比梯度，进而加快火焰传播速度并缩短燃烧持续期。 排放特性方面，与 D100 相比，P50 燃料使总碳氢化合物（THC）和 CO 排放量分别下降 96.7% 与 98.2%，但由于燃烧温度升高，NOX 排放呈上升趋势。

关键词: PODE；天然气；发动机；活性可控压燃