Investigation of Gasoline Partially Premixed Combustion with External Exhaust Gas Recirculation

2021 ◽  
Vol 15 (5) ◽  
Author(s):  
Vittorio Ravaglioli ◽  
Fabrizio Ponti ◽  
Giacomo Silvagni ◽  
Davide Moro ◽  
Federico Stola ◽  
...  
Keyword(s):  
Exhaust Gas Recirculation ◽  
Premixed Combustion ◽  
Exhaust Gas ◽  
Partially Premixed Combustion ◽  
Partially Premixed ◽  
Gas Recirculation

Characterization of Partially Premixed Combustion With Ethanol: EGR Sweeps, Low and Maximum Loads

2010 ◽  
Vol 132 (8) ◽  
Author(s):  
Vittorio Manente ◽  
Bengt Johansson ◽  
Pert Tunestal
Keyword(s):  
High Efficiency ◽  
Pressure Rise ◽  
Premixed Combustion ◽  
Maximum Pressure ◽  
Pressure Rise Rate ◽  
Start Of Injection ◽  
Partially Premixed Combustion ◽  
Rise Rate ◽  
Partially Premixed ◽  
Gas Recirculation

Exhaust gas recirculation (EGR) sweeps were performed on ethanol partially premixed combustion (PPC) to show different emission and efficiency trends as compared with diesel PPC. The sweeps showed that when the EGR rate is increased, the efficiency does not diminish, HC trace is flat, and CO is low even with 45% of EGR. NOx exponentially decreases by increasing EGR while soot levels are nearly zero throughout the sweep. The EGR sweeps underlined that at high EGR levels, the pressure rise rate is a concern. To overcome this problem and keep high efficiency and low emissions, a sweep in the timing of the pilot injection and pilot-main ratio was done at ∼16.5 bars gross IMEP. It was found that with a pilot-main ratio of 50:50, and by placing the pilot at −60 with 42% of EGR, NOx and soot are below EURO VI levels; the indicated efficiency is 47% and the maximum pressure rise rate is below 10 bar/CAD. Low load conditions were examined as well. It was found that by placing the start of injection at −35 top dead center, the efficiency is maximized, on the other hand, when the injection is at −25, the emissions are minimized, and the efficiency is only 1.64% lower than its optimum value. The idle test also showed that a certain amount of EGR is needed in order to minimize the pressure rise rate.

Influence of Exhaust Gas Recirculation on Combustion Instabilities in CH4 and H2/CH4 Fuel Mixtures

2010 ◽  
Author(s):  
Don Ferguson ◽  
Joseph A. Ranalli ◽  
Peter Strakey
Keyword(s):  
Exhaust Gas Recirculation ◽  
Premixed Combustion ◽  
Fuel Composition ◽  
Exhaust Gas ◽  
Combustion Instabilities ◽  
Lean Premixed Combustion ◽  
Lean Premixed ◽  
Fuel Mixtures ◽  
Gas Recirculation ◽  
The Impact

This paper evaluates the impact of two strategies for reducing CO2 emissions on combustion instabilities in lean-premixed combustion. Exhaust gas recirculation can be utilized to increase the concentration of CO2 in the exhaust stream improving the efficiency in the post-combustion separation plant. This coupled with the use of coal derived syngas or hydrogen augmented natural gas can further decrease CO2 levels released into the environment. However, changes in fuel composition have been shown to alter the dynamic response in lean-premixed combustion systems. In this study, a fully premixed, swirl stabilized, atmospheric burner is operated on various blends of H2/CH4 fuels with N2 and CO2 dilution to simulate EGR. Acoustic pressure and velocity, and global heat release measurements were performed at fixed adiabatic flame temperatures to evaluate the impact of fuel composition and dilution on various mechanisms that drive the instabilities.

scholarly journals Efficient hydrotreated vegetable oil combustion under partially premixed conditions with heavy exhaust gas recirculation

Fuel ◽  
2020 ◽  
Vol 268 ◽  
pp. 117350 ◽  
Author(s):  
Jacek Hunicz ◽  
Jonas Matijošius ◽  
Alfredas Rimkus ◽  
Artūras Kilikevičius ◽  
Paweł Kordos ◽  
...  
Keyword(s):  
Vegetable Oil ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Partially Premixed ◽  
Gas Recirculation

Study on the combustion characteristics of a premixed combustion system with exhaust gas recirculation

Energy ◽  
2013 ◽  
Vol 61 ◽  
pp. 345-353 ◽  
Author(s):  
Byeonghun Yu ◽  
Sung-Min Kum ◽  
Chang-Eon Lee ◽  
Seungro Lee
Keyword(s):  
Exhaust Gas Recirculation ◽  
Combustion Characteristics ◽  
Premixed Combustion ◽  
Exhaust Gas ◽  
Combustion System ◽  
Gas Recirculation

scholarly journals The Effects of Exhaust Gas Recirculation on Non-premixed Combustion

2014 ◽  
Vol 19 (3) ◽  
pp. 26-33 ◽  
Author(s):  
Byeonghun Yu ◽  
Jinsu Kim ◽  
Chang-Eon Lee
Keyword(s):  
Exhaust Gas Recirculation ◽  
Premixed Combustion ◽  
Exhaust Gas ◽  
Gas Recirculation
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