Influence of group-hole nozzles on spray and combustion of an opposed piston opposed cylinder diesel engine

被引：0
|
作者：
Zhou J. [1 ,2 ]
Sheng X. [2 ]
Yang H. [2 ]
Zhao W. [2 ]
Song T. [2 ]
机构：
[1] Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 01期
关键词：
Combustion; Group-hole nozzle; Mixture formation; Opposed piston opposed cylinder diesel engine; Spray;
D O I：
10.13224/j.cnki.jasp.2019.01.003
中图分类号：
学科分类号：
摘要：
With focus on the difficulty of mixture formation of an opposed piston opposed cylinder diesel engine, CONVEGE CFD software was employed to establish the numerical simulation model of an opposed piston opposed cylinder diesel engine. Three arrangements of the converging group-hole nozzle were designed, and without modifying the injection pressure, the fuel spray, mixture formation and combustion process of an opposed piston opposed cylinder diesel engine model were analyzed. The results indicated that the group-hole nozzle had negligible influences on spray penetration distance compared with conventional nozzle. The group-hole nozzle was helpful in improving the in-cylinder turbulence kinetic energy and accelerating the air-fuel mixing rate. Meanwhile, the mixture was evenly distributed and widely spread, helping to improve the quality of mixture and increase the in-cylinder pressure and combustion efficiency as well as improve the engine performance. Among three designs, the indicated power of the engine with the third pattern of converging group-hole increased by 7.6%. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：18 / 26
页数：8
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