不同结构燃烧室掺烧生物柴油对农用柴油机性能的影响  

Effect of biodiesel blending in different structure combustion chambers on the performance of agricultural diesel engines

作　　者：王东鸽 韩飞 何超[1,2,3] 王计广 陈彦林 赵龙庆[1,2] 于海生 包广元[1,2] 李加强 WANG Dongge;HAN Fei;HE Chao;WANG Jiguang;CHEN Yanlin;ZHAO Longqing;YU Haisheng;BAO Guangyuan;LI Jiaqiang(School of Mechanics and Transportation,Southwest Forestry University,Kunming 650224,China;Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial,Kunming 650224,China;Dehong Vocational College,Mangshi 678400,China;China Automotive Research Automotive Inspection Center(Kunming)Co.,Ltd.,Kunming 651705,China)

机构地区：[1]西南林业大学机械与交通学院,昆明650224 [2]云南省高校高原山地区机动车环保与安全重点实验室,昆明650224 [3]德宏职业学院,芒市678400 [4]中汽研汽车检验中心(昆明)有限公司,昆明651705

出　　处：《农业工程学报》2025年第7期81-88,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：云南省科技厅农业联合专项(202301BD070001-077);云南省科技厅农业联合专项面上项目(202301BD070001-257);云南省高层次人才培养支持计划+“青年拔尖人才”项目(YNWR-QNBJ-2018-066).

摘　　要：高海拔地区因空气稀薄和氧气含量降低,会导致发动机燃烧不完全,性能下降。为了恢复高原环境下发动机的性能,改善缸内“油-气-室”匹配和使用含氧燃料被认为是最有效的方法。该研究重点关注改善缸内的“油-气-室”匹配以及使用含氧燃料-生物柴油。该研究利用AVL FIRE软件进行仿真和试验验证,研究了两种燃烧室-原型ω燃烧室和优化后的TCD(turbocharger charger air cooling diesel particle filter)燃烧室在燃用不同燃料类型(B0(纯柴油)、B10、B20、B50)和不同转速条件下的性能。研究发现:TCD燃烧系统因其独特的凸形结构,增强了气缸内的油气混合和空气利用率,从而使燃料更充分地燃烧,进而改善了燃烧系统的性能。生物柴油由于含有氧气,能够促进更完全的燃烧,提高燃烧效率,并减少有害气体排放。与ω燃烧系统相比,TCD燃烧系统在指示功率、指示热效率、缸内峰值压力和缸内峰值温度方面均有增加,而指示燃油消耗率有所降低。具体而言,与ω燃烧系统相比,TCD燃烧系统在燃用B0、B10、B20和B50时,其指示功率在转速为3000 r/min时增幅最大,分别为14.10%、13.76%、13.43%和12.44%。同时,指示燃油消耗率的降幅最大分别为12.36%、12.09%、11.85%和11.07%。然而,TCD燃烧系统的NO_(x)排放量相对于ω燃烧系统较高,并且随着速度和混合燃料中生物柴油比例的增加而增加,这是因为TCD燃烧系统较高的缸内温度促进了NO_(x)的生成以及生物柴油自带的氧元素参与反应生成了更多的NO_x。在缸内油气混合方面,TCD燃烧系统相对于ω燃烧系统油气混合物质量更高,扩散面积更广。相反,TCD燃烧系统的Soot排放明显低于ω燃烧系统,并且随着速度和生物柴油比例的增加而降低。这项研究对柴油发动机系统的开发和高海拔环境中使用含氧燃料至关重要。研究揭示了如何优化发动机性能,提升高原地区的运行效�Incomplete combustion has posed the a great challenge on to the performance of engines in the high-altitude areas,due to the thin air and reduced oxygen content.The in-cylinder“oil-gas-chamber”matching can be expected to restore the engine performance at altitude.The oOxygenated fuels can also be considered to be the most effective alternatives.This study aims to improve the oil-gas-compartment matching using oxygenated fuel-biodiesel.Two types of combustion chambers the prototypeωand the optimized TCD(T-turbocharger,C-intake air cooling,and D-diesel particle filter)were simulated and experimentally validated using AVL FIRE software.The performance of the TCD combustion chamber was then evaluated under different fuel types(B0(pure diesel),B10,B20,and B50)and various speeds.A systematic investigation was finally implemented to explore the effects of biodiesel blending in the combustion chambers on the agricultural diesel engines.The results show that the TCD combustion chamber was enhanced the oil-gas mixing and air utilization in the cylinder,due to its unique convex structure.Thus,the more complete combustion of the fuel was has improved the performance of the engine system.Biodiesel was also promoted promotes the combustion efficiency with the less harmful emission,due to its oxygen content.Furthermore,the TCD combustion chamber also shared the higher indicated power,thermal efficiency,indicated incylinder peak pressure,and temperature,compared with the prototypeωones.While there was the a decrease in the fuel consumption rate.Specifically,the TCD combustion chamber showed the largest increase in the indicated power at a speed of 3000/(r·min^(-1)).The indicated power values were 14.10%,13.76%,13.43%and 12.44%,respectively,when burning B0,B10,B20 and B50,respectively.At the same time,the maximum decrease in the indicated fuel consumption rate was 12.36%,12.09%,11.85%,and 11.07%respectively.The higher NO_(x) emissions were observed in the TCD combustion chamber,compared with the prototypeωones.There was t

关 键 词：柴油机 AVL FIRE 燃烧室结构 生物柴油 

分 类 号：S126[农业科学—农业基础科学]