Numerical investigation of water injection quantity and water injection timing on the thermodynamics, combustion and emissions in a hydrogen enriched lean-burn natural gas SI engine

2020 ◽  
Vol 45 (35) ◽  
pp. 17935-17952 ◽  
Author(s):  
Jinfei Wang ◽  
Xiongbo Duan ◽  
Yiqun Liu ◽  
Wukun Wang ◽  
Jingping Liu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Investigation ◽  
Water Injection ◽  
Injection Timing ◽  
Si Engine ◽  
Lean Burn ◽  
Injection Quantity

Numerical investigation the effects of the twin-spark plugs coupled with EGR on the combustion process and emissions characteristics in a lean burn natural gas SI engine

Energy ◽  
2020 ◽  
Vol 206 ◽  
pp. 118181 ◽  
Author(s):  
Xiongbo Duan ◽  
Shiheng Zhang ◽  
Yiqun Liu ◽  
Yangtang Li ◽  
Jingping Liu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Investigation ◽  
Combustion Process ◽  
Si Engine ◽  
Lean Burn

Experimental and numerical investigation on H2/CO formation and their effects on combustion characteristics in a natural gas SI engine

Energy ◽  
2018 ◽  
Vol 143 ◽  
pp. 597-605 ◽  
Author(s):  
Changpeng Liu ◽  
Zhi Wang ◽  
Heping Song ◽  
Yunliang Qi ◽  
Yanfei Li ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Investigation ◽  
Combustion Characteristics ◽  
Si Engine

scholarly journals A Numerical Study on the Pilot Injection Conditions of a Marine 2-Stroke Lean-Burn Dual Fuel Engine

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1396
Author(s):  
Hao Guo ◽  
Song Zhou ◽  
Jiaxuan Zou ◽  
Majed Shreka
Keyword(s):  
Natural Gas ◽  
Fuel Injection ◽  
Numerical Study ◽  
Pollutant Emissions ◽  
Dual Fuel ◽  
Injection Timing ◽  
Pilot Injection ◽  
Lean Burn ◽  
Injection Duration ◽  
Pilot Fuel

The global demand for clean fuels is increasing in order to meet the requirements of the International Maritime Organization (IMO) of 0.5% global Sulphur cap and Tier III emission limits. Natural gas has begun to be popularized on liquefied natural gas (LNG) ships because of its low cost and environment friendly. In large-bore marine engines, ignition with pilot fuel in the prechamber is a good way to reduce combustion variability and extend the lean-burn limit. However, the occurrence of knock limits the increase in power. Therefore, this paper investigates the effect of pilot fuel injection conditions on performance and knocking of a marine 2-stroke low-pressure dual-fuel (LP-DF) engine. The engine simulations were performed under different pilot fuel parameters. The results showed that the average in-cylinder temperature, the average in-cylinder pressure, and the NOx emissions gradually decreased with the delay of the pilot injection timing. Furthermore, the combustion situation gradually deteriorated as the pilot injection duration increased. A shorter pilot injection duration was beneficial to reduce NOx pollutant emissions. Moreover, the number of pilot injector orifices affected the ignition of pilot fuel and the flame propagation speed inside the combustion chamber.

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