Numerical and Experimental Analysis of Thermal Boundary Conditions of HDD-Engine Cylinder Head for Different Combustion and Fuel

Articles in Press

Document Type : Original Article

Authors

1 Department of Mechanical Engineering, Babol Noushirvani University of Technology, Babol, Iran

2 Faculty of mechanical Engineering Shariati Avenue, BNUT,

3 Faculty of Mechanical Engineering, Babol Nooshirvani University of Technology

4 Department of Mechanical Engineering, Tennessee Tech University, Cookeville, TN, USA

Abstract

This article analyzes the effects of combustion type (conventional diesel, dual-fuel, and gas-fueled), structural material (Ductile cast iron and Gray cast iron), and thermal boundary conditions on the sensitive points of the heavy diesel engine cylinder head. The target engine in this numerical and experimental simulation is a 12-cylinder V-shaped heavy-duty medium-speed diesel engine with a turbocharger. The experiment begins by installing 14 sensors on cylinder head No. A6 due to the worst working condition of the engine. 3D simulation is performed using the Finite Volume Method (FVM) within the framework of ANSYS-Fluent 2021 software under time-variable conditions (18 min) and k-ε turbulent flow model. The outputs are as follows: with an increase of 24% of the TGas, the temperature of the bridge between the exhaust-exhaust and Inlet-Inlet valves for the Gray and Ductile cast iron cylinder head increases by about 20%. Meanwhile, with an increase of 36% from the heat transfer coefficient (HTC), the temperature of the bridge between the valves increases by 14%. The ratio of the effect of changes in the TGas to the HTC on the temperature of the bridge between the valves is about 1.9 for the cylinder head made of ductile cast iron and about 1.8 for the gray cast iron. Subcooled flow boiling will probably occur in the initial areas of the cylinder head, i.e. sensors 2, 5, 8, and 11 due to the temperature increase above 447.33K.

Keywords

Main Subjects

International Journal of Engineering

Articles in Press, Accepted Manuscript
Available Online from 11 March 2024

Files

Share

How to cite

Statistics