可变下止点式VCR柴油机燃用生物柴油的性能研究  

Study on Performance of VCR Diesel Engine Fueled with Biodiesel

作　　者：李毅 徐华平 高清林 王会成 林孝思 Li Yi;Xu Hua-ping;Gao Qing-lin;Wang Hui-cheng;Lin Xiao-si(Department of Electric Power Engineering,Fujian Electric Power Technical College,Quanzhou 362000,Fujian,China;School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;CSCC Huangpu Wen Chong Shipbuilding Company Limited,Guangzhou 510700,Guangdong,China)

机构地区：[1]福建电力职业技术学院电力工程系,福建泉州362000 [2]江苏科技大学能源与动力学院,江苏镇江212003 [3]中船黄埔文冲船舶有限公司,广东广州510700

出　　处：《内燃机与配件》2023年第21期41-44,共4页Internal Combustion Engine & Parts

基　　金：福建电力职业技术学院科技项目(2023KY018)。

摘　　要：通过某柴油机试验数据建立三维数值燃烧模型,运用AVL-Fire模拟可变下止点式VCR柴油机的缸内燃烧。通过改变下止点来改变压缩比,当活塞行程(压缩比)增大或减小时,缸内空气总量相对应地增大或减小。结果表明:可变下止点式VCR柴油机可以显著提升缸内平均燃烧压力,降低缸内平均燃烧温度,降低NOx与SOOT的排放;在活塞行程为0.082m时燃用纯柴油与活塞行程为0.112m时燃用B20混合燃料相比,缸压峰值能够提升40.52%,NOx可降低41.40%,SOOT可降低81.80%。Based on the experimental data of a diesel engine,a 3D model was established to simulate the in-cylinder combustion of a VCR diesel engine with variable piston stroke by using AVL-Fire.The compression ratio is changed by changing the BDC position.As the piston stroke(compression ratio)increases or decreases,the total amount of air in the cylinder increases or decreases correspondingly.The present calculation results show that VCR diesel engine with variable piston stroke can significantly increase the average combustion pressure in cylinder,reduce the average combustion temperature,and reduce NOx and SOOT emission.The performance of B20 fuel at 0.112m piston stroke is significantly improved compared with that of pure diesel fuel at 0.082m piston stroke,For example,the peak cylinder pressure can be increased by 40.52%,NOx can be decreased by 41.40%,and SOOT can be decreased by 81.80%.

关 键 词：柴油机 生物柴油 可变压缩比 排放 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]