scholarly journals Measurement and Simulation of Pollutant Emissions from Marine Diesel Combustion Engine and Their Reduction by Ammonia Injection

2009 ◽  
Vol 1 ◽  
pp. 459813 ◽  
Author(s):  
Nader Larbi ◽  
Jamel Bessrour
Keyword(s):  
Combustion Engine ◽  
Pollutant Emissions ◽  
Diesel Combustion ◽  
Marine Diesel ◽  
Ammonia Injection

Application of Hyperbolic Tangent Approximation Model to Gasoline Direct Injection Engine Simulation

2017 ◽  
Author(s):  
Tomoyuki Hosaka ◽  
Taisuke Sugii ◽  
Eiji Ishii ◽  
Kazuhiro Oryoji ◽  
Yoshihiro Sukegawa
Keyword(s):  
Open Source ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Direct Injection ◽  
Internal Combustion ◽  
Experimental Results ◽  
Gasoline Direct Injection ◽  
Pollutant Emissions ◽  
Mixture Formation ◽  
Hyperbolic Tangent

The improved fuel economy and low pollutant emissions are highly demanded for internal combustion engines. Gasoline Direct Injection (GDI) engine is the one of promising devices for highly efficient engine. However, GDI engines generally tend to emit more Particulate Matter (PM) than Port Fuel Injection (PFI) engine because the fuel sprayed from the injector can easily attach to the wall, which is the major origin of PM. Therefore, the precise analysis of the fuel/air mixture formation and the prediction of emissions are required. From the view of industrial use, Computational Fluid Dynamics (CFD) becomes a necessary tool for the various analyses including the fuel/air mixture formation, spray attachment on the cylinder wall, the in-cylinder turbulence formation, the combustion and emission etc. In our previous study, the flow and spray simulation in internal combustion engine has been conducted using OpenFOAM®, the open-source CFD toolbox. Since the engine involves the dynamic motion such as valve and piston, the morphing and mapping approach was employed. Furthermore, by virtue of open-source code, we have developed the methodology of the hybrid simulation from the internal nozzle flow to the fuel/air mixture in order to take into account detailed breakup process nearby injector nozzle. We expand the above research to the combustion simulation. For the combustion model, the Hyperbolic Tangent Approximation (HTA) model is adopted. The HTA model has a simple form of equation and one can easily implement; moreover, the HTA model has the following features: 1. capability of both laminar and turbulent flow, 2. the clearness of analytical derivation based on the functional approximation of the reaction progress variable distribution in a one-dimensional laminar flame. In the current study, the premixed flame is studied on a gasoline combustion engine. The simulations for in-cylinder engine are conducted with different Air/Fuel (A/F) ratio conditions, and the results are compared with the experimental results. The in-cylinder pressure agrees well with experimental results and the validity of the current methodology is confirmed.

scholarly journals EVALUATION OF POLLUTANT EMISSIONS FROM TWO-STROKE MARINE DIESEL ENGINE FUELED WITH BIODIESEL PRODUCED FROM VARIOUS WASTE OILS AND DIESEL BLENDS

Brodogradnja ◽  
2016 ◽  
Vol 67 (4) ◽  
pp. 81-90 ◽  
Author(s):  
Danilo Nikolić ◽  
Nada Marstijepović ◽  
Sead Cvrk ◽  
Radmila Gagić ◽  
Ivan Filipović
Keyword(s):  
Diesel Engine ◽  
Pollutant Emissions ◽  
Marine Diesel Engine ◽  
Waste Oils ◽  
Marine Diesel

Investigation of Combustion Strategy for Commercialization of Low Temperature Diesel Combustion Engine

2014 ◽  
Vol 22 (6) ◽  
pp. 120-127 ◽  
Author(s):  
Euijoon Shim ◽  
Youngdeok Han ◽  
Seunghyup Shin ◽  
Duksang Kim ◽  
Sangil Kwon
Keyword(s):  
Low Temperature ◽  
Combustion Engine ◽  
Diesel Combustion

Approaches in Correlation Analysis and Application on Oil Field Data

2016 ◽  
Vol 841 ◽  
pp. 77-82 ◽  
Author(s):  
David Vališ ◽  
Libor Žák
Keyword(s):  
Correlation Analysis ◽  
Field Data ◽  
Combustion Engine ◽  
Correlation Coefficients ◽  
Oil Field ◽  
Diesel Combustion ◽  
Spearman Correlation ◽  
Output Data ◽  
Input And Output

The paper deals with selected approaches which unite several correlation analysis principles. Field data very often has various forms and contents. The comparison of different approaches will help to determine more precisely which correlation analysis is better for assessing input and output data. In this paper we introduce several correlation principles which can help to select the most suitable correlation approach. We present a traditional correlation analysis and compare it with Pearson and Spearman correlation coefficients. The value of our article lies in comparing several different approaches of the correlation analysis in which the oil field data from diesel combustion engine are used

scholarly journals On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine, at the main engine - steam turbine mode of cooperation

2009 ◽  
Vol 16 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Marek Dzida
Keyword(s):  
Diesel Engine ◽  
Power Plant ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Combustion Engine ◽  
Marine Diesel Engine ◽  
Piston Engine ◽  
Marine Diesel ◽  
Main Engine ◽  
Turbine Mode

On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine, at the main engine - steam turbine mode of cooperation This paper presents a concept of a ship combined high-power system consisted of main piston engine and associated with it: gas power turbine and steam turbine subsystems, which make use of energy contained in exhaust gas from main piston engine. The combined system consisted of a piston combustion engine and an associated with it steam turbine subsystem, was considered. An algorithm and results of calculations of the particular subsystems, i.e. of piston combustion engine and steam turbine, are presented. Assumptions and limitations taken for calculations, as well as comparison of values of some parameters of the system and results of experimental investigations available from the literature sources, are also given. The system's energy optimization was performed from the thermodynamic point of view only. Any technical - economical analyses were not carried out. Numerical calculations were performed for a Wärtsilä slow-speed diesel engine of 52 MW output power.

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