Journal of Polish CIMAC

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Stochastic Contributions On The Pressure In Slide Bearing Gaps After Impulse

K. Wierzcholski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 493-501

This paper concerns the derivation of the stochastic modified Reynolds equations describing the hydrodynamic pressure for non-Newtonian, viscoelastic, lubricant inside the curvilinear orthogonal (spherical, conical, cylindrical, parabolic ) slide bearing. Non- isothermal, unsteady and random flow conditions and thermal deformations of the bearing and its bearing sleeve are taken into account. This...

article

Pressure And Capacity Distributions In Deformable Spherical Slide Bearing Gaps

K. Wierzcholski, A. Miszczak

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 503-509

This paper presents the pressure and capacity distributions in a thin layer of non-Newtonian, viscoelastic, lubricant inside the slide spherical bearing. Non-isothermal, unsteady and random flow conditions and thermal deformations of the bearing surfaces are taken into account. This problem finds application in ship power plants, electric locomotive designing, and precision engineering.

article

Selected Problems Of Modelling The Working Of Container Injection Systems Of Common Rail Type

M. Walkowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 485-492

In the work an attempt was made to replace the conventional system of controlling the dose and angle of advance of fuel injection by an electronically controlled system, which was implemented by attaching a fuel container to the conventional high-pressure fuel system, and an electronically controlled, electro-hydraulic fuel-dosage valve. It was assumed that by controlling the current impulse of the...

article

Performance Of The Advanced And Simplified Variants Of A Non-Linear Observer Of A Turbojet Engine, Comparison Of Results

W. Pawlak, J. Spychała

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 383-390

Non-linear observers have got great potentialities in the fields of turbojet engine control, monitoring and diagnosing. They may prove of particular suitability for measuring actual values of the so-called difficult-to-measure parameters, e.g. temperature of the working medium at the combustion chamber outlet, thrust, etc. For this reason, reliability and accuracy of results of the performance of...

article

Marine Engines Of NATO Navies And Ecological Problems Of Their Exploitation

M. Pawlak, L. Piaseczny

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 375-382

Imposing the legal regulations aims at extorting restrictions of harmful substances in marine engines exhaust gases emissions. An Annex VI of MARPOL73/78 Convention, being ratified in 2005, lays commercial ships under an obligation of the reduction of emissions of sulphur and nitrogen oxides that are formed when combusting marine fuels. And although navy vessels are excluded from performing that obligation,...

article

Mathematical Models Of Mechanical Properties Of Vessel Screw Propellers

L. Piaseczny, K. Rogowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 399-405

During repairing screw propellers by welding and plastic deformation it is indispensable to know their material features and strength properties relative to the propeller part subject to repair. The authors have conducted statistical and empirical research aimed at determining those features depending on the propeller’s chemical composition and blade thickness. These dependencies are presented in...

article

Modelling The Emission Of Noxious Compounds Of Main Engine Exhaust Gases In The Gulf Of Gdańsk Region

L. Piaseczny, T. Kniaziewicz

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 391-398

The development of marine diesel engines has so far been directed towards raising their power, reducing fuel consumption, burning fuels of the lowest possible quality and the extension of operation time. The rising pro-ecologic pressure has caused atmosphere pollution by exhaust gases of marine engines to be one of the main problems of environment protection of recent years. The Gulf of Gdansk area,...

article

Identification Of Models For Multicriterial Optimization Of Sailing Vessel Driving Systems

W. Tarełko, K. Rudzki

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 447-455

This paper deals with models of driving system of sailing vessels developed by applying methods of regression analysis and artificial neural networks. In particularly, a general form, identification process, and comparison of these models are presented.

article

Making Use Of Starting The Engine To Determine The Moment Of Inertia Of A Ship Propulsion System

J. Rosłanowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 431-436

The article presents the method of determining the moment of inertia of a ship propulsion system while starting the engine which is based on torque and rotational speed measurements . The ship propulsion system in which the measurements were taken consisted of a slow – speed propulsion engine , shafting and fixed pitch propeller . The measurements mentioned above allow determination of a dynamics...

article

The Determination Of The Disperse Phase Refinement On Water In Fuel Emulsions With The Use Of Thin-Layer Emulsion Images Using A Microscope And A Malvern Mastersizer 2000 Device

P. Rajewski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 423-429

The paper includes a proposal of methods for testing and evaluation quality and stability of water in fuel emulsion used in combustion tests on marine engine in MAN laboratory test bed. Attempts to satisfy the requirements set forth in Annex VI of the Marpol Convention and Resolution 33EU concerning, among other issues, the reduction of NOx emission in exhaust gases from marine engines and boilers...

article

Testing The Resistance Of Piston Engine Oils Against Mechanical Degradation

J. Sarnecki, J. Zieliński

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 465-468

article

Gaseous Erosion And Corrosion Of Turbines

B. Olzak, J. Szymczak, A. Szczepankowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 369-374

The paper presents main service problems of turbomachinery users. These are gaseous erosion and corrosion of turbine elements specifically in jet aero engines. The factors that have an influence on this phenomena initiation and development have been described. The illustrated examples show the development of turbine elements degradation caused by them. The influence of this phenomena on jet engine...

article

The Measurement Of Losses Generated In Kinematic Nodes Of Engine Run At Test Stand

W. Serdecki, P. Krzymień

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 469-476

Reduction in losses accompanying the operation of IC engine requires previous identification of their sources and estimation of their value. Reduction in friction losses that is the most important component of the resistance to motion is particularly substantial. In following study the authors presented the best known methods of friction losses estimation pointing out their advantages and shortcomings...

article

A New Design Of Energetic Unit For Ships

V. Hlavňa

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 165-168

A new possibility of utilization of ICE cooling medium thermal capacity is its connection with the independent sorption cooling equipment by thermal pipe. Such a configuration avoids the use of a utilizable thermal gradient. This disadvantage of connection of the classical combustion engine with sorption cooling equipment is solved by a cooling internal combustion engine. Its basis lies in the fact...

article

Problems With Utylise Of Glicerol Fraction - Waste Products Of Fame Production

J. Borgoń, W. Dzięgielewski, T. Gołębiowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 73-76

article

Energetic Assessment Of The Ship Non-Conventional Energetic Unit

D. Sojčák, V. Hlavňa, P. Piroch

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 169-172

The paper deals with a non-conventional energetic unit equipped with a cooling combustion engine designed as an element for qualitatively new equipment to achieve a more efficient utilization of energy chemically bound in fuel of the combustion engine by transformation of heat into cold via thermocompression. A simple example illustrates the advantage of a non-conventional energetic system from the...

article

Technical And Economical Analysis Of Combined Cycles Of Gas Turbine - Steam Turbine On Pipeline Compressor Stations. Part I - Technical Analysis

M. Górecki, M. Dzida

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 141-147

In this part there have been shown issues of combined cycle which are on Gas Compressor Stations, reclaiming steam blocks. In analysis of this issue there have been taken few variants of steam cycle configuration and few variants of part load of gas turbine. To steam cycles there have been taken all basis parameters, and then there have been made thermodynamic calculations, which result was value...

article

The NOx Emission Prediction In Diesel Exhaust For Large Bore Marine Engines

T. Borkowski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 85-92

The general IMO procedure was adopted with the main aim to achieve compliant engine performance with current environmental legislation. The paper investigates possibility of multi-zone diesel combustion model use to estimate NOx emission. The model calculation results are compared with the experimental data obtained for marine diesel engine - Sulzer A20/24. An experimental study is conducted to investigate...

article

Analysis Of Two Design Kind Of Propulsion For An Inland Vessel

Cz. Dymarski

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 107-116

This paper presents design assumptions, technical conditions and two kinds of design solution of propulsion system for an inland waterways ship. In the first version this is a combustion-electric system fitted with frequency converter and in the other - combustion-hydraulic one with hydrostatic reduction gear. There are also a preliminary comparative analysis of these systems.

article

The Experimental Analysis Of Non-Thermal Plasma Reactor Use For Marine Diesel Exhaust

T. Borkowski, J. Myśków, M. Hołub, S. Kalisiak, more

Journal of Polish CIMAC > 2007 > Vol. 2, no 1 > 77-84

The control of NOx (NO and NO2) emissions from marine engines remains a challenge. In recent years, there have been a number of reports show that plasma device combined with a catalyst can reduce as high as 90% of NOx in simulated diesel exhaust gas. In the case of real diesel exhaust, the beneficial role of a plasma treatment is now thought to be the oxidation of NO to NO2, and the formation of partially...

INFONA - science communication portal

Journal of Polish CIMAC

Stochastic Contributions On The Pressure In Slide Bearing Gaps After Impulse

Pressure And Capacity Distributions In Deformable Spherical Slide Bearing Gaps

Selected Problems Of Modelling The Working Of Container Injection Systems Of Common Rail Type

Performance Of The Advanced And Simplified Variants Of A Non-Linear Observer Of A Turbojet Engine, Comparison Of Results

Marine Engines Of NATO Navies And Ecological Problems Of Their Exploitation

Mathematical Models Of Mechanical Properties Of Vessel Screw Propellers

Modelling The Emission Of Noxious Compounds Of Main Engine Exhaust Gases In The Gulf Of Gdańsk Region

Identification Of Models For Multicriterial Optimization Of Sailing Vessel Driving Systems

Making Use Of Starting The Engine To Determine The Moment Of Inertia Of A Ship Propulsion System

The Determination Of The Disperse Phase Refinement On Water In Fuel Emulsions With The Use Of Thin-Layer Emulsion Images Using A Microscope And A Malvern Mastersizer 2000 Device

Testing The Resistance Of Piston Engine Oils Against Mechanical Degradation

Gaseous Erosion And Corrosion Of Turbines

The Measurement Of Losses Generated In Kinematic Nodes Of Engine Run At Test Stand

A New Design Of Energetic Unit For Ships

Problems With Utylise Of Glicerol Fraction - Waste Products Of Fame Production

Energetic Assessment Of The Ship Non-Conventional Energetic Unit

Technical And Economical Analysis Of Combined Cycles Of Gas Turbine - Steam Turbine On Pipeline Compressor Stations. Part I - Technical Analysis

The NOx Emission Prediction In Diesel Exhaust For Large Bore Marine Engines

Analysis Of Two Design Kind Of Propulsion For An Inland Vessel

The Experimental Analysis Of Non-Thermal Plasma Reactor Use For Marine Diesel Exhaust

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