Numerical and Experimental Characterization of the Dual-Fuel Combustion Process in an Optically Accessible Engine

2013 ◽  
Author(s):  
Radu Florea
Keyword(s):  
Combustion Process ◽  
Fuel Combustion ◽  
Dual Fuel ◽  
Experimental Characterization ◽  
Dual Fuel Combustion

New Dual-fuel Combustion Process for Passenger Car Engines

MTZ worldwide ◽  
2018 ◽  
Vol 79 (6) ◽  
pp. 60-67
Author(s):  
Florian Sprenger ◽  
Paul Fasching ◽  
Christina Granitz ◽  
Helmut Eichlseder
Keyword(s):  
Combustion Process ◽  
Fuel Combustion ◽  
Dual Fuel ◽  
Passenger Car ◽  
Dual Fuel Combustion

Numerical Simulation of a Large Bore Dual Fuel Marine Engine Using Tabulated Detailed Reaction Mechanisms

2019 ◽  
Author(s):  
Sascha Andree ◽  
Dmitry Goryntsev ◽  
Martin Theile ◽  
Björn Henke ◽  
Karsten Schleef ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Natural Gas ◽  
Chemical Reaction ◽  
Reaction Mechanisms ◽  
Combustion Process ◽  
Fuel Combustion ◽  
Dual Fuel ◽  
Start Of Injection ◽  
Flamelet Generated Manifold ◽  
Dual Fuel Combustion

Abstract The simulation of a diesel natural gas dual fuel combustion process is the topic of this paper. Based on a detailed chemical reaction mechanism, which was applied for such a dual fuel combustion, the complete internal combustion engine process was simulated. Two single fuel combustion reaction mechanisms from literature were merged, to consider the simultaneous reaction paths of diesel and natural gas. N-heptane was chosen as a surrogate for diesel. The chemical reaction mechanisms are solved by applying a tabulation method using the software tool AVL Tabkin™. In combination with a Flamelet Generated Manifold (FGM) combustion model, this leads to a reduction of computational effort compared to a direct solving of the reaction mechanism, because of a decoupling of chemistry and flow calculations. Turbulence was modelled using an unsteady Reynolds-Averaged Navier Stokes (URANS) model. In comparison to conventional combustion models, this approach allows for detailed investigations of the complex ignition process of the dual fuel combustion process. The unexpected inversely proportional relationship between start of injection (SOI) and start of combustion (SOC), a later start of injection makes for an earlier combustion of the main load, is only one of these interesting combustion phenomena, which can now be analyzed in detail. Further investigations are done for different engine load points and multiple pilot injection strategies. The simulation results are confirmed by experimental measurements at a medium speed dual fuel single cylinder research engine.

scholarly journals Characterization of soot from diesel-CNG dual-fuel combustion in a CI engine

Fuel ◽  
2016 ◽  
Vol 184 ◽  
pp. 145-152 ◽  
Author(s):  
Karthik Nithyanandan ◽  
Yilu Lin ◽  
Robert Donahue ◽  
Xiangyu Meng ◽  
Jiaxiang Zhang ◽  
...  
Keyword(s):  
Fuel Combustion ◽  
Dual Fuel ◽  
Dual Fuel Combustion ◽  
Ci Engine

Oxidation and nanostructural characterization of exhaust particulates from gasoline/diesel dual-fuel combustion

Fuel ◽  
2021 ◽  
Vol 298 ◽  
pp. 120837
Author(s):  
Xiaochen Wang ◽  
Ying Wang ◽  
Yuanqi Bai ◽  
Funan Guo ◽  
Dongxing Wang
Keyword(s):  
Fuel Combustion ◽  
Dual Fuel ◽  
Dual Fuel Combustion

Characterization of the LPG - Diesel Dual Fuel Combustion

2001 ◽  
Author(s):  
A. Bilcan ◽  
O. Le Corre ◽  
M. Tazerout ◽  
A. Ramesh ◽  
S. Ganesan
Keyword(s):  
Fuel Combustion ◽  
Dual Fuel ◽  
Dual Fuel Combustion

scholarly journals A Three-Zone Heat-Release Rate Model for Dual-Fuel Combustion

2010 ◽  
Vol 224 (11) ◽  
pp. 2423-2434 ◽  
Author(s):  
J Stewart ◽  
A Clarke
Keyword(s):  
Heat Release ◽  
Reaction Zone ◽  
Heat Release Rate ◽  
Release Rate ◽  
Combustion Process ◽  
Fuel Combustion ◽  
Gaseous Fuel ◽  
Dual Fuel ◽  
Pilot Fuel ◽  
Dual Fuel Combustion

Dual-fuel engines are modified compression ignition engines, where the primary source of fuel is a gaseous fuel, and ignition is provided by a ‘pilot’ injection of a reduced quantity of diesel. The generally accepted understanding of the dual-fuel engine describes its combustion process as proceeding in three stages. Initially, around half of the pilot will burn and entrain some gaseous fuel into an overall fuel-rich process. Subsequently, the remaining pilot fuel burns and entrains an increasing amount of the primary fuel into its reaction zone. In the final stage, a flame propagation process engulfs the remaining gaseous fuel. In this article, a three-zone model for the analysis of heat-release rate during the dual-fuel combustion process will be derived. This model will be tested against data obtained for diesel combustion and then applied to experimental data from a dual-fuel test program. It will be shown that there is little evidence to support the generally accepted description of the dual-fuel combustion process in a direct injection engine. The conclusion of this work is that dual-fuel combustion may be better considered as a diesel combustion process, where the gaseous fuel modifies the reaction zone surrounding each igniting droplet of the pilot fuel.

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