scholarly journals On the Cylinder Liner Temperature Distribution of the Japanese Medium-Speed Farm-Type Kerosene Engine for General-Use

1959 ◽  
Vol 25 (156) ◽  
pp. 873-878
Author(s):  
Masatake HARA ◽  
Yasumi MAEDA
Keyword(s):  
Temperature Distribution ◽  
Cylinder Liner ◽  
Farm Type ◽  
Medium Speed

Methods for Determining the Thermal State of Medium-Speed Diesel Engines Taking into Account Boiling of the Coolant

2020 ◽  
pp. 22-28
Author(s):  
L.L. Myagkov ◽  
V.M. Sivachev
Keyword(s):  
Heat Transfer ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Thermal State ◽  
Cooling System ◽  
Fatigue Cracks ◽  
Cylinder Liner ◽  
Thermal Factor ◽  
Medium Speed ◽  
Thermal Fatigue Cracks

Forcing medium-speed diesel engines by increasing the mean effective pressure leads to an increase in the thermal factor of the engine parts. High temperatures of the cylinder head fire deck and the cylinder liner working surface cause thermal fatigue cracks in these parts as well as piston scuffing. Therefore, the development of new methods of intensifying heat transfer in the cooling gallery and refined methods for determining the engine parts thermal state is currently relevant. In both areas of research, a significant role is played by the process of coolant boiling, which significantly intensifies heat transfer in the cooling system. A review of the literature showed that the existing methods of mathematical modeling of conjugate heat transfer in the cooling cavities taking into account the boiling process have a number of significant drawbacks. This paper presents the developed mathematical model and methods for determining the thermal state of medium-speed diesel engine parts taking into account boiling of the coolant, thus making it possible to combine the advantages of both the engineering approach and numerical simulation based on computational fluid dynamics. The thermal state of a new generation medium-speed diesel engine D500 was calculated and the thermal factor of the main engine parts was estimated.

Analytical Evaluation of Heat Flow Pattern in Biodiesel Operated Engine Cylinder

2017 ◽  
Author(s):  
Chidiebere Nwaiwu ◽  
Kevin Nwaigwe ◽  
Nnamdi Ogueke
Keyword(s):  
Temperature Distribution ◽  
Cylinder Head ◽  
Palm Kernel ◽  
Cylinder Liner ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Ansys Fluent ◽  
Matlab Code ◽  
Head Section ◽  
Biodiesel Fuels

There has been a global search for alternative fuels that are environmentally friendly to replace and or compliment the conventional fossil fuels used in running engines. This is in line with the global action to reduce CO2 emissions hence ameliorating the effect of climate change. Biodiesel fuels have been adjudged to be clean energy with minimal environmental pollution during combustion. Hence, biodiesel fuels for running compression ignition engines have been developed from various feedstocks such as vegetable oils, animal fat, and waste or used cooking oils. The properties of these biodiesels have been reported to be dependent on the feedstock type and therefore vary according to the source feedstock. In carrying out this present study on the effects of utilising biodiesel fuel on the compression ignition engine, a numerical study of temperature distribution in the cylinder liner of biodiesel-powered compression ignition engine is presented. Biodiesel produced from palm kernel oil is used. Eight nodes in the cylinder liner spanning the top section of the liner, midpoint and the interface between the liner and the block were used as data source as it is established that sharp-edged points are most likely regions for thermal stress. Of the eight nodes selected, four were edge nodes and the other four were nodes at the interface with varying conditions. Model equations used for the study were developed and subsequently transformed using the finite difference method. Numerical solutions were obtained from computer codes written in MATLAB programming language. The obtained results from this code were compared to results obtained from commercial software (ANSYS FLUENT) for same geometry and boundary conditions. Results on the cylinder liner showed steady state temperatures were reached in about five minutes using both the MATLAB code and ANSYS FLUENT and both results showed a similar trend of temperature distribution in the radial direction. However, the MATLAB code showed higher temperatures at the upper section of the liner material as compared to the midpoint of the liner whereas ANSYS FLUENT showed the midpoint section to possess maximum temperatures as compared to the cylinder head section. Both results agree with the lower section having least temperature distribution. Further analyses were carried out on the midpoint of the cylinder and the cylinder head section and factors responsible for the discrepancies discussed. The outcome of this study presents palm kernel based biodiesel as an alternative fuel in cylinder engines while highlighting sections of the engine that require design attention in terms of heat flux and engine stability.

Paper 7: The Prediction of Diesel Engine Performance and Combustion Chamber Component Temperatures Using Digital Computers

1967 ◽  
Vol 182 (12) ◽  
pp. 58-70 ◽  
Author(s):  
M. S. Janota ◽  
A. J. Hallam ◽  
E. K. Brock ◽  
S. G. Dexter
Keyword(s):  
Diesel Engine ◽  
Temperature Distribution ◽  
Boundary Conditions ◽  
Combustion Chamber ◽  
Engine Performance ◽  
Practical Applications ◽  
Medium Speed ◽  
Turbo Charger ◽  
Engine Components ◽  
Surrounding Fluid

The development of digital programs for predicting the performance of multi-cylinder, turbo-charged diesel engines, and the temperature distribution in engine components is described. The performance program incorporates the relatively simple ‘filling and emptying’ method, with the turbo-charger compressor and turbine as boundary conditions, to calculate transient gas conditions. In the second part of the paper a description is given of the metal temperature program assumptions and use, including the deduction of the surrounding fluid conditions. The accuracy and limitations of the performance program is demonstrated by comparing predictions and measurements on an experimental 2-stroke single cylinder diesel engine operating under simulated turbo-charged conditions. The practical applications of the programs to medium speed 2- and 4-stroke engines are illustrated, and the economics of their use as a design aid are discussed.

scholarly journals Influence of piston ring profiles and oil temperature distribution on cylinder liner lubrication of a marine two-stroke engine

2019 ◽  
Vol 178 (3) ◽  
pp. 257-263
Author(s):  
Andrzej WOLFF
Keyword(s):  
Temperature Distribution ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Combustion Engines ◽  
Comprehensive Model ◽  
Piston Rings ◽  
Calculation Results ◽  
The Right ◽  
Stroke Engine ◽  
Selection Of

In the paper a comprehensive model of a piston-ring-cylinder (PRC) system has been presented. The local thickness of the oil film can be compared to height of the combined surface roughness of a cylinder liner and piston rings. Equations describing the mixed lubri-cation problem based on the empirical mathematical model formulated in works of Patir, Cheng and Greenwood, Tripp have been ap-plied. The main parts of the model have been experimentally verified abroad by the author at the marine engine designing centre. In contrast to the previous papers of the author concerning the PRC system of combustion engines, new calculation results for a ma-rine two-stroke engine have been presented. Firstly the right selection of barrel-shaped sliding surface of piston rings has been analysed. Secondly the influence of oil temperature distribution along the cylinder liner on the lubrication of the PRC system has been assessed. The developed model and software can be useful for optimization of the PRC system design.

Numerical Study of the Effect of a Biodiesel on the Cylinder Liner of Compression Ignition Engine

2017 ◽  
Author(s):  
Chidiebere F. Nwaiwu ◽  
Olisaemeka C. Nwufo ◽  
Johnson O. Igbokwe ◽  
Nnamdi V. Ogueke ◽  
Emmanuel E. Anyanwu
Keyword(s):  
Temperature Distribution ◽  
Diesel Fuel ◽  
Cylinder Head ◽  
Numerical Study ◽  
Cylinder Liner ◽  
Maximum Temperature ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Liner Material ◽  
Head Section

A numerical study of temperature distribution in the cylinder liner of biodiesel-powered compression ignition engine is presented. The mathematical model equations developed were based on heat transfers in the cylinder liner and subsequently transformed using the finite difference method. Numerical solutions were obtained from computer codes written in MATLAB programming language. A biodiesel produced from Nigerian physic nut oil was used in the study. The result was compared with that obtained for conventional diesel fuel. The results revealed that the cylinder head section of the liner material presented higher temperature distribution compared to the oil sump section of the liner. Over a twelve-minute time range, the liner attained steady state with Jatropha-based biodiesel, recording a maximum temperature of 873.1°C. Conventional diesel recorded the lower temperature of 784.3°C. Results also showed that the cylinder head section of the liner material closest to the combustion chamber experienced the greatest temperature rise in comparison to other parts of the liner. These results show that though there are lots of publications confirming that a compression ignition engine previously running on diesel fuel can run on biodiesel fuel or its blend with diesel, there is a need for a further critical study on the development of engine parts like the cylinder liner.

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