Improving performance of the basic heat-stressed parts of a forced medium-speed diesel engine

Due to constant forcing of the medium-speed diesel engines, a problem of significant increase in their thermal and stress-strain states is arising in the basic parts and units. The paper is devoted to reducing thermal stress in the cylinder head of a forced medium-speed diesel engine. It provides results of numerical simulation of the cylinder set thermal state, including the cover with valves and the bushing. Two designs of the cylinder head are considered. The paper proposes options making it possible to lower temperature of the cylinder assembly elements to the required values, and to increase the diesel engine efficiency, including its gas joint. It presents computed dependencies, which could be applied to determine the boundary conditions of heat exchange in the considered parts for a subsequent mathematical simulation of the cylinder set thermal state in the ANSYS software package. Two cylinder head designs are compared: a serial one and another with the local cooling cavity in the output channel area.
EDN: QLICQS, https://elibrary/qlicqs

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