高原环境下喷孔夹角对某增压柴油机性能影响的数值模拟与分析  

Numerical Simulation and Analysis of Influence of Nozzle Hole Cone Angle on Turbocharged Diesel Engine at High Altitude

作　　者：徐华平[1] 陆锦华[1] 姚宏伟[2] 韩小林 

机构地区：[1]江苏科技大学能源与动力工程学院,江苏镇江212003 [2]江苏渔船检验局,江苏南通226006 [3]总装备部车船装备论证试验研究所,南京210028

出　　处：《船舶工程》2015年第1期54-57,共4页Ship Engineering

基　　金：国家自然科学基金青年基金(51306079);江苏省高校自然科学基金面上项目(12KJB470005)

摘　　要：基于ECFM-3Z燃烧模型建立适应高原环境柴油机缸内工作过程模型,在平原试验验证的基础上,对喷油器喷孔夹角为147°、150°、153°、156°四种情况进行数值模拟,分析了喷孔夹角对海拔4550m下缸内燃烧过程的影响。研究结果表明,喷孔夹角增大后,缸内压力和温度上升,功率得到一定恢复,柴油机的排放随之上升。综合考虑柴油机的动力性和排放,海拔4550m下将喷孔夹角从150°(平原原机值)增加到153°比较合理。A CFD model on working process of certain turbocharged diesel engine adaptive to environment was built with ECFM-3Z combustion model, the results of simulation are verified by engine bench test in plain, nozzle hole cone angle （147°, 150°, 153°, 156°） on the combustion process performance at 4550m altitude have been analyzed. Simulation results show that with the increase of the angle, the maximum of in-cylinder pressure and average temperature were improved, power and NOx emission increased. By synthetically considering engine power and emissions, the optimal nozzle hole cone angle is 153° at 4550m altitude.

关 键 词：增压柴油机 高原 喷孔夹角 性能恢复 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]