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- W2897316662 abstract "The paper is continuation of the part A and presents influence of boundary conditions on mechanical and thermal stresses of an oil cooled piston in diesel engine Scania DC09 074A and its deformation due to high combustion pressure and variable temperature. Calculations of the piston loads were carried out by using 0D mathematical model at assumption of the Vibe combustion model and the Woschni heat transfer model for homogenous mixture. For precise determination of the gas temperature in the combustion chamber the CFD technique was used and for that case the simulation of compression, combustion and expansion processes was carried out by using the program Fluent. The numerical calculations were done for two kinds of fuel: diesel oil and CNG. In order to proper work of CNG engine the compression ratio was decreased. This was done by reducing the volume of the combustion chamber. Calculations done in the program Ansys showed that the modification of the piston do not influence significantly on the total stresses. The paper shows the differences of the total stresses and piston deformation at fastened piston hub and at floating piston pin. Most calculations are taken that the piston hubs are fixed, but it is not right assumption. In summary the paper gives indications how to set boundary conditions for floating piston pin. Due to different fixing of the pin in the piston hub the deformation of the piston shape and von Misses stresses differ at the same boundary conditions The analysis has shown that FEM calculations of the piston should be done together with the pin for giving the engineers right information how to design the piston shape, usually barrel-oval, in order to enable a proper clearance between the piston and cylinder walls at high loads." @default.
- W2897316662 created "2018-10-26" @default.
- W2897316662 creator A5074760791 @default.
- W2897316662 date "2018-10-11" @default.
- W2897316662 modified "2023-10-12" @default.
- W2897316662 title "Study of influence of boundary conditions on deformation and stresses in a cooled piston of a diesel engine – part B - calculations" @default.
- W2897316662 cites W2022275452 @default.
- W2897316662 doi "https://doi.org/10.1088/1757-899x/421/4/042057" @default.
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