Model of the combustion process in the marine 4-stroke diesel engine

Kowalski, Jerzy

doi:10.17814/mechanik.2015.10.508

Mechanik

2015

DOI: 10.17814/mechanik.2015.10.508

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Model of the combustion process in the marine 4-stroke diesel engine

Jerzy Kowalski¹

Abstract: MODEL OF THE COMBUSTION PROCESS IN THE MARINE 4-STROKE DIESEL ENGINE SUMMARY Manuscript presents a model of the combustion process in marine four-stroke diesel engine to determine the nitric oxides fraction (NOx) in the exhaust gas. This is iterative, 3-dimensional model, built on geometric mesh of the engine cylinder chamber. The model includes mathematical description of fuel injection, spray, evaporation and auto ignition and flame propagation in the cylinder. In order to determine the NOx fraction, the hea… Show more

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Cited by 2 publications

References 16 publications

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Model of exhaust system of a traction diesel engine with pulse supercharging on transient modes

Babeł

Kossov²

2017

Combustion Engines

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A mathematical model of joint operation of a piston engine with pulse turbine drive, compressor as well as air supply of a diesel locomotive is presented in the article. This model in an integral part of the complex engine-generator power unit of a diesel locomotive in steady states and transient conditions, developed by the authors. The periodic process in the exhaust manifold is represented as two specific characteristic ranges which encompass the process of forced exhaust and the scavenging process. The scavenging calculation is carried out jointly with the processes taking place in the inlet manifold of the engine, including inlet devices of the locomotive. The process of forced exhaust is calculated separately from the inlet processes and doesn`t require usage of empirical coefficients of impulsiveness. Both processes are represented as systems of nonlinear algebraic equations describe in the quasi-steady flow of working fluid in the elements of the inlet and exhaust tracts. The gas-dynamic calculation of the turbine in the transition process is conducted while taking into account changes in flow angles on the rotor blades. As a result of numerical calculation of the a8S22W diesel operational indices in transient modes, a satisfactory compliance of the calculated and the experimental results was obtained.

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Model of exhaust system of a traction diesel engine with pulse supercharging on transient modes

Babeł

Kossov²

2017

Combustion Engines

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The Theoretical Study on Influence of Fuel Injection Pressure on Combustion Parameters of the Marine 4-Stroke Engine

Kowalski

2016

Journal of KONES. Powertrain and Transport

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The manuscript presents the analysis of influence of fuel injection pressure on the combustion parameters of marine 4-stroke diesel engine. Analysis is based on computational fluid dynamic (CFD) model designed on the basis of the motion mesh of combustion chamber of the marine engine cylinder and air inlet and exhaust gas ducts. Presented model consists of models of fuel injection into combustion chamber, breaking-up and evaporation of the fuel, mixing with air and turbulent combustion with heat transfer to construction elements of the engine cylinder. Mentioned CFD model is validated according to boundary and initial conditions taken from direct measurements. The chosen research object is laboratory 4-stroke turbocharged Diesel engine with direct injection of the fuel and mechanically controlled of both cylinder valves and the injector. During the calculation the fuel dose, delivered into the engine cylinder was changed without any other changes in the initial and boundary conditions. This approach to the problem allows to the cause-effect analysis. The results of presented study are as follows: The increase of the fuel injection pressure causes the increase of fuel dose, delivered into the engine cylinder and the increase of intensity of both kinetic and diffusion stage of the combustion process. The result of this is the increase of pressure and temperature of the combustion and significant increase of the NOx fraction despite the decrease of the O2 content in the combustion chamber of the engine.

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Model of the combustion process in the marine 4-stroke diesel engine

Cited by 2 publications

References 16 publications

Model of exhaust system of a traction diesel engine with pulse supercharging on transient modes

Model of exhaust system of a traction diesel engine with pulse supercharging on transient modes

The Theoretical Study on Influence of Fuel Injection Pressure on Combustion Parameters of the Marine 4-Stroke Engine

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