scholarly journals Modeling of post-injection strategies of ethanol and experimental analysis of the use of ethanol in the form of dual fuel and emulsion in diesel engine

2021 ◽  
pp. 73-73
Author(s):  
Hüseyin Gürbüz ◽  
Tarkan Sandalci
Keyword(s):  
Experimental Studies ◽  
Engine Performance ◽  
Nox Emission ◽  
Pollutant Emissions ◽  
Post Injection ◽  
Emulsion Method ◽  
Performance And Emissions ◽  
Main Injection ◽  
Engine Performance And Emissions ◽  
Injection Strategies

In this research, as the first stage, the effects of the ethanol on engine performance and emissions under the fumigation and emulsion method were experimentally investigated under part load and various engine speed conditions. Diesel-ethanol blend containing 5% ethanol by volume was used as the mixture fuel. In the fumigation method, ethanol was used at the same rate and 99.9% purity as the emulsion method. As the second stage, the effects of ethanol post injection on engine performance and pollutant emissions were investigated in the experimental engine modeled in AVL Boost simulation program and compared with the experimental results. Simulation post injection tests were performed separately after the main injection at 3 CA (P1) and 7 CA (P2) crank angles. In the experimental studies, NOx emission decreased with the emulsion method (E5) at low and high engine speeds. In post injection strategies, NOx emission in general increased due to improved combustion and increased in-cylinder temperature with P1 (first post injection) and P2 (second post injection) strategies. Soot emission decreased significantly with E5. This improvement in soot emissions was approximately 87% in post injection strategies.

scholarly journals Effects of Different Injection Strategies on Combustion and Emission Characteristics of Diesel Engine Fueled with Dual Fuel

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1300
Author(s):  
Jianbin Luo ◽  
Zhonghang Liu ◽  
Jie Wang ◽  
Heyang Chen ◽  
Zhiqing Zhang ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Nox Emission ◽  
Dual Fuel ◽  
Emission Characteristics ◽  
Post Injection ◽  
Mixing Ratio ◽  
Gas Mixing ◽  
Main Injection ◽  
Injection Strategies

In this work, an effective numerical simulation method was developed and used to analyze the effects of natural gas mixing ratio and pilot-main injection, main-post injection, and pilot-main-post injection strategies on the combustion and emission characteristics of diesel engine fueled with dual fuel. Firstly, the one-dimensional calculation model and three-dimensional CFD model of the engine were established by AVL-BOOST and AVL-Fire, respectively. In addition, the simplified chemical kinetics mechanism was adopted, which could accurately calculate the combustion and emission characteristics of the engine. The results show that the cylinder pressure and heat release rate decrease with the increase of the natural gas mixing ratio and the NOx emission is reduced. When the NG mixing ratio is 50%, the NOx and CO emission are reduced by 47% and 45%, respectively. When the SODI3 is 24 °CA ATDC, the NOx emission is reduced by 29.6%. In addition, with suitable pilot-main injection and pilot-main-post injection strategies, the combustion in the cylinder can be improved and the trade-off relationship between NOx and soot can be relaxed. Thus, the proper main-post injection strategy can improve the combustion and emission characteristics, especially the reduction in the NOx and CO emissions.

Assessment of pilot injection strategies and n-pentanol additive effects on engine performance and emissions

Fuel ◽  
2019 ◽  
Vol 257 ◽  
pp. 115999 ◽  
Author(s):  
Rong Huang ◽  
Xiaoyu Guo ◽  
Haozhong Huang ◽  
Mingzhang Pan ◽  
Te Wang ◽  
...  
Keyword(s):  
Engine Performance ◽  
Pilot Injection ◽  
Additive Effects ◽  
Performance And Emissions ◽  
Engine Performance And Emissions ◽  
Injection Strategies

Improving diesel engine performance and emissions characteristics fuelled with biodiesel

Fuel ◽  
2021 ◽  
Vol 302 ◽  
pp. 121097
Author(s):  
M. Mourad ◽  
Khaled R.M. Mahmoud ◽  
El-Sadek H. NourEldeen
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Performance And Emissions ◽  
Engine Performance And Emissions

scholarly journals Jet A and Propane gas combustion in a turboshaft engine: performance and emissions reductions

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Ali Hasan ◽  
Oskar J. Haidn
Keyword(s):  
Combustion Process ◽  
Engine Performance ◽  
Emissions Reductions ◽  
Gas Combustion ◽  
Liquid Petroleum Gas ◽  
Performance And Emissions ◽  
Air Mixing ◽  
Turboshaft Engine ◽  
Engine Performance And Emissions ◽  
Lower Carbon

AbstractThe Paris Agreement has highlighted the need in reducing carbon emissions. Attempts in using lower carbon fuels such as Propane gas have seen limited success, mainly due to liquid petroleum gas tanks structural/size limitations. A compromised solution is presented, by combusting Jet A fuel with a small fraction of Propane gas. Propane gas with its relatively faster overall igniting time, expedites the combustion process. Computational fluid dynamics software was used to demonstrate this solution, with results validated against physical engine data. Jet A fuel was combusted with different Propane gas dosing fractions. Results demonstrated that depending on specific propane gas dosing fractions emission reductions in ppm are; NOx from 84 to 41, CO2 from less than 18,372 to less than 15,865, escaping unburned fuels dropped from 11.4 (just Jet A) to 6.26e-2 (with a 0.2 fraction of Propane gas). Soot and CO increased, this is due to current combustion chamber air mixing design.

Nanofuels: Combustion, engine performance and emissions

Fuel ◽  
2014 ◽  
Vol 120 ◽  
pp. 91-97 ◽  
Author(s):  
Rakhi N. Mehta ◽  
Mousumi Chakraborty ◽  
Parimal A. Parikh
Keyword(s):  
Combustion Engine ◽  
Engine Performance ◽  
Performance And Emissions ◽  
Engine Performance And Emissions
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