Abstract
In order to serve the design, improvement, and manufacture of engine cylinder liners, it is necessary to accurately determine its temperature distribution. This paper presents the calculation of the cylinder liner temperature distribution in a V-12 engine by the finite element method (FEM) written in ANSYS Parametric Design Language (APDL) and verified with experimental results. In this model, the process of heat transfer from the ring group and area of the piston skirt to the cylinder liner wall is considered by using the thermal circuit method. In the study, at engine speeds of 2000 [rev/min] and 1200 [rev/min], the thermal distribution of the cylinder liner is carried out at 50%, 60%, 75%, and 100% of an entire load. The results of the tests show that the theoretical model is highly reliable, with the largest relative error of 5.49%.
Highlights
In reciprocating internal combustion engines, the heat transfer from hot gases to coolant exhibits from 25 percent to 30 percent of the total energy released during burning the fuel-air mixture
About half of the heat is transferred to the cylinder liner walls, and most of the remaining heat goes to the coolant in the cylinder head, with the highest rates around the exhaust valves
These areas are divided based on the calculation of the engine operating cycle, the correlation between the piston surface and cylinder wall when the piston is at the bottom dead center (BDC)
Summary
In reciprocating internal combustion engines, the heat transfer from hot gases to coolant exhibits from 25 percent to 30 percent of the total energy released during burning the fuel-air mixture. [2], a number of empirical models for predicting in-cylinder heat transfer in internal combustion engines have been investigated. There has been a surge in interest in heat transfer phenomena in internal combustion engines, owing to their importance in, among other things, successful simulations of thermodynamic cycles and investigations of thermal loading of the components at critical areas [3,4,5]. A variety of methods can be used to model the heat transfer processes in an internal combustion engine. When designing a cylinder liner, it is necessary to determine the thermal load, the mechanical load acting on during the engine operating cycle, including determining the temperature distribution of the cylinder liner. Heat transfer analysis is important in engine design, accurate prediction of temperature distribution is required for the analysis of thermal stress limits for cylinder materials. The content of the paper includes the calculation results of the temperature distribution of the wet cylinder liner, as well as a comparison with experimental results
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