苏鹏,杨鑫,张永虎,等.高原环境下聚甲氧基二甲醚对柴油机燃烧和排放性能的影响[J].内燃机工程,2022,43(6):55-61.
高原环境下聚甲氧基二甲醚对柴油机燃烧和排放性能的影响
Effects of Polyoxymethylene Dimethyl Ethers on the Combustion and Emission Characteristics of A Diesel Engine at Plateau Environment
DOI：10.13949/j.cnki.nrjgc.2022.06.007
关键词:柴油机  高原环境  聚甲氧基二甲醚  外特性  燃烧特性
Key Words:diesel engine  plateau environment  polyoxymethylene dimethyl ethers（PODE）  external characteristic  combustion characteristic
基金项目:重庆市自然科学基金项目（cstc2019jcyj-msxmX0453）；重庆市教委科学技术研究项目（KJQN201912911）
作者单位E-mail
苏鹏* 陆军勤务学院 油料系，重庆 401311 947146337@qq.com 
杨鑫* 陆军勤务学院 油料系，重庆 401311 beyondyzs@126.com 
张永虎 军需能源质量监督总站，北京 100071  
陈然 军需能源质量监督总站济南质量监督站，济南 250100  
熊云 陆军勤务学院 油料系，重庆 401311  
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摘要:以掺混不同体积分数（10%、20%）聚甲氧基二甲醚（polymethoxydimethyl ethers， PODE）的柴油为含氧燃料，采用某军用泵机组柴油机进行发动机台架试验，通过控制进气压力模拟高原地区柴油机进气条件，模拟海拔0~4 000 m时含氧燃料对发动机外特性、燃烧特性和排放性能的影响。结果表明，低海拔下，该柴油机燃用掺混PODE燃料后功率低于燃用0号车用柴油，燃油消耗率升高。随海拔升高，柴油机燃用掺混PODE燃料后功率和燃油消耗率逐渐接近燃用纯柴油。当海拔达到4 000 m时，柴油机燃用掺混20%体积分数的PODE燃料后功率平均增加3.6%，燃油消耗率平均下降1.2%。海拔4 000 m、柴油机2 000 r/min、100%负荷下，燃用掺混PODE燃料后燃烧位移前移，缸压峰值、放热率峰值提高，滞燃期和燃烧持续期缩短。不同海拔下，燃用掺混PODE燃料后CO、HC排放显著降低，NOx排放有所增加。
Abstract:Taking diesel fuel blended with polymethoxydimethyl ethers （PODE） of different volume fractions （10%， 20%） as oxygenated fuel， an engine bench test was carried out with a diesel engine of a military pump unit， and the plateau area was simulated by controlling the intake pressure. The diesel engine intake conditions were used to investigate the effects of oxygenated fuel on the external characteristics， combustion characteristics and emission performance of the engine at simulated altitudes in the range of 0~4 000 m.Results show that， under the low altitude， the power and fuel economy of diesel engine fueled by PODE/diesel blend fuel were lower than that of 0# vehicle diesel. With the increase of altitude， the power and economy of diesel engine fueled by this oxygenated fuel gradually approached that of vehicle diesel. When the simulated altitude reached 4 000 m， the power of the diesel engine fueled with 20% PODE fuel was increased by 3.6% and the fuel consumption rate was decreased by 1.2% on average. At working condition of altitude 4 000 m， speed of 2 000 r/min and 100% load， compared with 0# vehicle diesel fuel， the combustion phase of PODE/diesel blend fuel became closer to the top dead center. The maximal cylinder pressure and the peak value of heat release of PODE/diesel blend fuel increased， while the ignition delay time and the combustion efficiency decreased slightly. At different altitudes， the HC and CO emissions of the engine fueled with oxygenated fuel reduced significantly， while the NOx emission increased slightly.
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