Thermal Effects on Diesel Engine Piston and Piston Compression Rings (original) (raw)
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Static and Thermal Analysis of Piston and Piston Rings
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The piston is the most important component of internal combustion engines. The piston ring contains a ring pack and cylinder wall. The piston ring is the moving component and it is composed of aluminium matrix composites. The aim of the work is to determine the structural and thermal stress distribution of piston rings using CATIA and ANSYS. Combustion engine pistons transform heat energy into mechanical energy by expanding gases. The thermal and structural analyses were done on the piston rings model using the properties of aluminium matrix composites (aluminium A2024 alloy and fly ash).
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The power can be generated in the combustion chamber of an automobile. The combustion chamber is the place where the charge burns in. The charge i.e. air and fuel at various proportions depending upon the accelerations made is sent through carburettor which is compressed inside the combustion chamber with to and fro moments of piston within the top and bottom dead centres. After the combustion, the burnt charge exerts a lot of force on the piston. The piston plays various roles in compressing the charge and in transferring the produced power to the crankshaft. During this process, always the piston is in contact with the charge. The burnt charge has temperature about 12000C. The heat flows into the piston. So the piston should have sufficient mechanical strength to with stand the force acting by the explosion and the piston should be thermally stable to with stand the heat flow into the piston. The piston is cooled by providing cooling fins external to the surface of Combustion Chamber. In this paper the thermal analysis of the piston is done by modelling the piston with aluminium alloy. The thermal analysis was analysed using software ANSYS. It is found that, the aluminium alloy piston is having the sufficient thermal stability to with stand the high temperatures.
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DESIGN AND THERMAL ANALYSIS OF VARIOUS TYPES OF PISTON WITH DIFFERENT ALUMINIUM ALLOYS
International Journal for Science and Advance Research In Technology, 2019
Piston as one of the most important component in an engine, its thermal load always causes fatigue failure. A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings Piston that transfer the combustive gases power to the connecting rod. Failure of piston due to various thermal and mechanical stresses. This paper describes the thermal distribution of the single cylinder engine piston by using FEA. Creo Computer Aided Design (CAD) software was used to design the existing piston. The main objectives is to investigate and analyze the temperature distribution of piston at the real engine condition during combustion process. The Aluminium Alloy Al(6063) and Al(4032) have been selected for thermal analysis of piston and piston rings. We applied temperature 262oC on piston crown. Finally choosing which one is the bestalloythat can be used as the piston material to improve the efficiency. Design of the piston is carried out using creo software, thermal analysis is performed using Finite Element Analysis Method in Ansys Software.
Experimental Thermal Analysis of Diesel Engine Piston and Cylinder Wall
Journal of Engineering, 2015
Knowledge of piston and cylinder wall temperature is necessary to estimate the thermal stresses at different points; this gives an idea to the designer to take care of weaker cross section area. Along with that, this temperature also allows the calculation of heat losses through piston and cylinder wall. The proposed methodology has been successfully applied to a water-cooled four-stroke direct-injection diesel engine and it allows the estimation of the piston and cylinder wall temperature. The methodology described here combines numerical simulations based on FEM models and experimental procedures based on the use of thermocouples. Purposes of this investigation are to measure the distortion in the piston, temperature, and radial thermal stresses after thermal loading. To check the validity of the heat transfer model, measure the temperature through direct measurement using thermocouple wire at several points on the piston and cylinder wall. In order to prevent thermocouple wire en...
In this study, firstly, thermal analyses are investigated on a conventional (uncoated) diesel piston, made of aluminium silicon alloy for design 1 and design 2 parameters. Secondly, thermal analyses are performed on piston, coated with Zirconium material by means of using a commercial code, namely ANSYS. The effects of coating on the thermal behaviours of the pistons are investigated. The finite element analysis is performed by using computer aided design software. The main objective is to investigate and analyze the thermal stress distribution of piston at the real engine condition during combustion process. This thesis describes the mesh optimization by using finite element analysis technique to predict the higher stress and critical region on the component.
Improving the Heat Transfer Rate for Multi Cylinder Engine Piston and Piston Rings
The four stroke otto engine uses just one of the four strokes to perform work. This causes various problems: The engine runs jerkily, and this can only be prevented by a large flywheel, which needs a lot of space and weights pretty much in addition. In this thesis, thermal loads and pressures produced in the multi cylinder petrol engine Toyota 86 Car by varying compression ratios 14:1, 15:1, 18:1, 20:1 and 25:1 are calculated by mathematical correlations And also calculating the effect of these thermal loads on piston and piston rings by varying materials Cast Iron, Aluminum Alloy 6061 for piston and Cast Iron and Steel for piston rings.FEA transient thermal analysis is performed on the parametric model to validate the effect of thermal loads on piston and piston rings for different materials. The optimum value of compression ratio and the better material is determined by analysis results to improve the heat transfer rate of multi cylinder engine piston and piston rings. Dynamic analysis is done on the piston by applying the pressures developed and also static analysis by applying the maximum pressure.