A Coupled Tabulated Kinetics and Flame Propagation Model for the Simulation of Fumigated Medium Speed Dual-Fuel Engines

2019 ◽  
Author(s):  
Gilles Decan ◽  
Tommaso Lucchini ◽  
Gianluca D'Errico ◽  
Sebastian Verhelst
Keyword(s):  
Flame Propagation ◽  
Propagation Model ◽  
Dual Fuel ◽  
Medium Speed ◽  
Dual Fuel Engines

Investigation of the cylinder cut-out for medium-speed dual-fuel engines

2018 ◽  
pp. 209-224
Author(s):  
Johannes Konrad ◽  
Thomas Lauer ◽  
Mathias Moser ◽  
Enrico Lockner ◽  
Jianguo Zhu
Keyword(s):  
Dual Fuel ◽  
Medium Speed ◽  
Dual Fuel Engines

Characterization of reaction zone growth in an optically accessible heavy-duty diesel/methane dual-fuel engine

2018 ◽  
Vol 20 (5) ◽  
pp. 483-500 ◽  
Author(s):  
Jeremy Rochussen ◽  
Patrick Kirchen
Keyword(s):  
Growth Rate ◽  
Reaction Zone ◽  
Flame Propagation ◽  
High Speed ◽  
Dual Fuel ◽  
Pilot Injection ◽  
Fuel Conversion ◽  
Dual Fuel Engines ◽  
Dual Fuel Combustion ◽  
Zone Growth

The performance of dual-fuel engines in terms of fuel conversion efficiency and unburned hydrocarbon emission is strongly influenced by the turbulent flame propagation through the premixed natural gas. To improve dual-fuel engine design and provide validation data for numerical models, the fuel conversion process must be better characterized, specifically the reaction zone growth rate. In this work, high-speed imaging of OH*-chemiluminescence is performed in an optically accessible 2 L engine operated with port-injected CH4 and direct-injected diesel for different diesel and CH4 fueling rates and pilot injection pressures ( Ppilot). The cumulative histogram time series is introduced for directly comparing high-speed optical data of dual-fuel combustion with simultaneously measured apparent heat release rate. The cumulative histogram time series diagram is also used to evaluate a “global” reaction zone speed, SRZ,g, based on OH*-chemiluminescence images. The SRZ,g calculation normalizes the reaction zone area growth rate by the perimeter of the reaction zone to determine the velocity scale, while a “local” reaction zone speed, SRZ,l, is based on the local displacement of the reaction zone boundary per unit time. From the distribution of SRZ,l for each image frame, a previously proposed metric for determining the transition from pilot autoignition based on apparent heat release rate was validated and used to evaluate a single mean flame propagation speed, [Formula: see text]. Using these metrics, it was noted that increasing ϕCH4 from 0.40 to 0.69 results in an increase in [Formula: see text] from 4 to 8 m/s and 8 to 14 m/s for pilot injection pressures of 300 and 1300 bar, respectively. The spatial distribution of SRZ,l also indicates that autoignition of the pilot jets is not simultaneous (arising from asymmetric injector geometry) and leads to an overlap of the autoignition and flame propagation processes. This is not considered in the conventional conceptual model of dual-fuel combustion and impacts calculation of [Formula: see text] for the small diesel injections commonly used for dual-fuel engines.

scholarly journals Study on the Performance Analysis of Dual Fuel Engines on the Medium Speed Diesel Engine

2020 ◽  
Vol 68 (1) ◽  
pp. 163-174 ◽  
Author(s):  
Muhammad Arif Budiyanto ◽  
Agus Sunjarianto Pamitran ◽  
Hadi Tresno Wibowo ◽  
Fahd Naufal Murtado
Keyword(s):  
Diesel Engine ◽  
Performance Analysis ◽  
Dual Fuel ◽  
Medium Speed ◽  
Dual Fuel Engines

Pilot Injection Strategies for Medium-speed Dual-fuel Engines

2018 ◽  
Vol 8 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Björn Henke ◽  
Sascha Andree ◽  
Bert Buchholz ◽  
Martin Theile
Keyword(s):  
Dual Fuel ◽  
Pilot Injection ◽  
Medium Speed ◽  
Dual Fuel Engines ◽  
Injection Strategies

Investigation of the Cylinder Cut-out for Medium-speed Dual-fuel Engines

2018 ◽  
Vol 8 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Johannes Konrad ◽  
Thomas Lauer ◽  
Mathias Moser ◽  
Jianguo Zhu
Keyword(s):  
Dual Fuel ◽  
Medium Speed ◽  
Dual Fuel Engines

scholarly journals Phenomenological micro-pilot ignition model for medium-speed dual-fuel engines

Fuel ◽  
2021 ◽  
Vol 285 ◽  
pp. 118955
Author(s):  
Hyunchun Park ◽  
Yuri M. Wright ◽  
Omar Seddik ◽  
Ales Srna ◽  
Panagiotis Kyrtatos ◽  
...  
Keyword(s):  
Dual Fuel ◽  
Medium Speed ◽  
Dual Fuel Engines

Pielstick Experience With Dual-Fuel Engines and Cogeneration

1988 ◽  
Vol 110 (3) ◽  
pp. 349-355 ◽  
Author(s):  
G. Grosshans ◽  
M. Litzler
Keyword(s):  
Energy Consumption ◽  
Diesel Engines ◽  
Primary Energy ◽  
Dual Fuel ◽  
Gas Mixture ◽  
The West ◽  
Medium Speed ◽  
Dual Fuel Engines ◽  
Textile Factory ◽  
Solvent Vapors

SEMT PIELSTICK has developed since 1971 a range of medium-speed dual-fuel engines with relatively high air-fuel ratios, which enable ratings similar to diesel engines. The PC 2.3 DF.C of 1971 was developed up to 535 hp/cyl. and was followed by the PC 2.5 DF.C of 600 hp/cyl. This later engine was applied in the West German cogeneration plan of a textile factory, giving more than 82 percent use of primary energy. This engine may also be used as a pollution-abating machine, because it traps toxic solvent vapors, which are burned in the engine, reducing furthermore the apparent (paid) energy consumption. Thanks to the lean air-gas mixture, the very severe West German limits on pollution could be fulfilled without any extra depolluting device. The newest development is the PA 5 DF engine of the same philosophy, which will cover the 1000 to 3600 kW range.

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