赵文涛,李红梅,张肖,等.柴油/聚甲氧基二甲醚混合燃料撞壁传热与燃烧特性数值分析[J].内燃机工程,2026,47(1):34-47.
柴油/聚甲氧基二甲醚混合燃料撞壁传热与燃烧特性数值分析
Numerical Analysis of Wall Impingement Heat Transfer and Combustion Characteristics of Diesel/Poloxymethylene Dimenthyl Ether Fuel Blends
DOI：10.13949/j.cnki.nrjgc.2026.01.004
关键词:聚甲氧基二甲醚  撞壁燃烧  壁面传热  数值分析  双色法
Key Words:polyoxymethylene dimethyl ether（PODE）  impact wall combustion  wall heat transfer  numerical analysis  two-color method
基金项目:
作者单位E-mail
赵文涛* 大连理工大学 能源与动力学院，大连 116000 wentaozhao@mail.dlut.edu.cn 
李红梅 先进船舶发动机技术全国重点实验室，上海 201108
上海船用柴油机研究所 上海，201108 		lihongmei711@163.com 
张肖 先进船舶发动机技术全国重点实验室，上海 201108
上海船用柴油机研究所 上海，201108 		zhangxiao@smderi.cn 
肖鸽 大连理工大学 能源与动力学院，大连 116000 xiaoge2020@yeah.net 
隆武强* 大连理工大学 能源与动力学院，大连 116000 longwq@dlut.edu.cn 
靳广杰 大连理工大学 能源与动力学院，大连 116000 jinguangjie2021@163.com 
王鹏 大连理工大学 能源与动力学院，大连 116000 josen.wpeng@qq.com 
王洋 大连理工大学 能源与动力学院，大连 116000 wydlut2010@163.com 
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摘要:为了探究柴油与聚甲氧基二甲醚（polyoxymethylene dimethyl ether， PODE）混合燃料在撞壁燃烧过程中的传热与燃烧特性，通过数值仿真方法系统分析了PODE掺混比例、环境温度、背压及喷射压力等参数对喷雾发展、燃烧过程及壁面传热的影响。结果表明，当PODE体积掺混比为40%时，燃烧热效率峰值降低约30%，燃烧持续时间缩短约 15%，同时碳烟排放降低22%。高氧含量的PODE促进燃料与空气的均匀混合，使壁面热流密度分布更均匀，有效缓解了热疲劳损伤。此外，适度提高环境温度（900 K）可增强喷雾稳定性，减少未燃燃料及碳烟生成；而高背压（8 MPa）虽抑制喷雾外围发展并降低当量比，但会导致局部碳烟生成增加。提升喷射压力（160 MPa）可加速油气混合过程，缩短滞燃期，使碳烟排放减少 35%。
Abstract:To investigate the heat transfer and combustion characteristics of diesel-polyoxymethylene dimethyl ether （PODE） blended fuel during wall-burning combustion， a systematic analysis was conducted by means of numerical simulation. The effects of PODE blending ratios， ambient temperatures， backpressures， and injection pressures on spray development， combustion processes and wall heat transfer were analyzed. The results showed that when the PODE volume blending ratio was 40%， the peak combustion thermal efficiency was reduced by approximately 30%， the combustion duration was reduced by approximately 15%， and carbon smoke emissions decreased by 22%. The high oxygen content of PODE promotes uniform mixing of fuel and air， resulting in a more uniform distribution of wall heat flux density and effectively mitigating thermal fatigue damage. Additionally， when the ambient temperature is moderately increased as 900 K spray stability will be enhanced， unburned fuel and soot generation will be reduced. However， high backpressure （8 MPa） suppresses spray peripheral development and reduces the equivalence ratio， but leads to increased local soot generation. When the injection pressure is as high as 160 MPa， the fuel-air mixing process accelerates， the ignition delay time is shortened， and the soot emission is reduced by 35%.
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