Thermal and structural analyses of an internal combustion engine piston with suitable different super alloys

Abstract

Abstract The objective of this paper is to study the thermal and structural performance of piston by changing the gas pressure conditions with different super alloys. Piston model is created using CATIA and analysis is done in ANSYS 16. Boundary conditions used are load, support, convection coefficient and heat flow. Different super alloys are used as materials in the present study that have dissimilar thermal conductivities and densities. For Alcoa Deltalloy, the maximum temperature occurred is low for the same heat flow input as compared to other materials used. It also has less deformation in spite of higher thermal expansion coefficient. NIMONIC alloy showed the lowest equivalent stress among all the super alloys considered. In case of combined thermal and structural load, Alcoa Deltalloy showed the increasing trend of deformation, but non-linear. UNS S20103 and NIMONIC alloy 81 showed decreasing trend of deformation as pressure is increased. The value of equivalent stress in Alcoa Deltalloy is found to be very less as compared to other two super alloys. On the basis of observations, it is clear that Alcoa Deltalloy is the best material for use of engine piston that can have better operating conditions in terms of less failure and long life