Effects of intake swirl on the fuel/air mixing and combustion performance in a lateral swirl combustion system for direct injection diesel engines

Fuel ◽  
2021 ◽  
Vol 286 ◽  
pp. 119376
Author(s):  
Yanlin Chen ◽  
Xiangrong Li ◽  
Shuainan Shi ◽  
Qingxu Zhao ◽  
Dong Liu ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Combustion System ◽  
Combustion Performance ◽  
Swirl Combustion ◽  
Air Mixing ◽  
Intake Swirl

Research on energy distributions of the lateral swirl combustion system in DI diesel engines

Fuel ◽  
2019 ◽  
Vol 235 ◽  
pp. 1347-1360 ◽  
Author(s):  
Li XiangRong ◽  
Zhao WeiHua ◽  
Su LiWang ◽  
Liu FuShui
Keyword(s):  
Diesel Engines ◽  
Combustion System ◽  
Energy Distributions ◽  
Swirl Combustion

Numerical Analysis of Swirl Chamber Combustion System in DI Diesel Engines with the Conical-Spray

2015 ◽  
Vol 752-753 ◽  
pp. 922-927
Author(s):  
Sheng Li Wei ◽  
Kun Peng Ji ◽  
Xian Yin Leng ◽  
Xuan Liu
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Cone Angle ◽  
Combustion System ◽  
Combustion Chambers ◽  
Spray Cone Angle ◽  
Spray Cone ◽  
Swirl Chamber ◽  
Narrow Passage ◽  
Combustion Processes

In order to promote the quality of mixture and improve the fuel spray spatial distribution, enhancing airflow movement in a combustion chamber, a new swirl chamber combustion system in DI (direct injection) diesel engines is proposed based on conical-spray. Numerical simulations have been conducted by using the FIRE v2008 code. Several different widths of passage and spray angles are investigated in a single cylinder 135 diesel engine. The combustion and emissions performance were investigated by different conical-spray nozzles and combustion chambers with a constant compression ratio. The results show that using this combustion system, the mixture formation and combustion processes have been improved by a certain longitudinal swirl when the air is squished into the swirl chamber through the relative narrow passage. Moreover, the formation of homogeneous mixture is accelerated and the combustion is improved compared with that of conventional combustion system. The cases show the passage width of 5mm and conical spray cone angle of 140° has a better performance in the new combustion system.

Penetration and Vaporization of Diesel Fuel Sprays

1969 ◽  
Vol 184 (10) ◽  
pp. 147-170 ◽  
Author(s):  
R. Burt ◽  
K. A. Troth
Keyword(s):  
Combustion Chamber ◽  
Diesel Engines ◽  
Direct Injection ◽  
Combustion Process ◽  
Major Effect ◽  
Engine Fuel ◽  
Liquid Droplets ◽  
Fuel Sprays ◽  
Air Movement ◽  
Air Mixing

In the diesel engine, fuel is injected into the hot, compressed air in the combustion chamber. Thus the process of diesel combustion is essentially inhomogeneous, and the mixing of the fuel and air in the combustion chamber dominates the whole combustion process. Since fuel–air mixing is so important the distribution of the injected fuel has a major effect on combustion performance. This is particularly true of direct-injection diesel engines which have relatively low rates of air movement. In all diesel engines, fuel is injected into the combustion chamber at high pressure through small nozzles. The high-velocity liquid jet atomizes, after emerging from the nozzle, into a spray of liquid droplets. The penetration, distribution, and vaporization of the sprays, together with the air movement, govern the mixing of fuel and air. The penetration of fuel sprays is dealt with in Part 1 of the paper; Part 2 describes a study of the vaporization of fuel sprays.

Combustion and emission characteristics of a lateral swirl combustion system for DI diesel engines under low excess air ratio conditions

Fuel ◽  
2016 ◽  
Vol 184 ◽  
pp. 672-680 ◽  
Author(s):  
XiangRong Li ◽  
Haiqin Zhou ◽  
Liwang Su ◽  
Yanlin Chen ◽  
Zhenyang Qiao ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Emission Characteristics ◽  
Combustion System ◽  
Excess Air ◽  
Swirl Combustion

Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines

Energy ◽  
2014 ◽  
Vol 75 ◽  
pp. 289-294 ◽  
Author(s):  
Shengli Wei ◽  
Kunpeng Ji ◽  
Xianyin Leng ◽  
Feihu Wang ◽  
Xin Liu
Keyword(s):  
Numerical Simulation ◽  
Diesel Engines ◽  
Direct Injection ◽  
Spray Angle ◽  
Combustion System ◽  
Swirl Chamber
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