CFD and Thermo Mechanical Analysis on Effect of Curved vs Step Surface in IC Engine Cylinder Head

Frontiers in Automobile and Mechanical Engineering

Balaji, S.^1 ; Ganesh, N.^1 ; Kumarasamy, A.^1

SCIENTISTS, ENGINE DIVISION, CVRDE, DRDO, Chennai, India^1

关键词: Design parameters;    Heat transfer capability;    Heat transfer rate;    Higher efficiency;    Stepped surfaces;    Structural aspects;    Structural strength;    Thermo-mechanical analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/197/1/012074/pdf
DOI  :  10.1088/1757-899X/197/1/012074

来源: IOP

【 摘 要 】

Current research in IC engines mainly focus on various methods to achieve higher efficiency and high specific power. As a single design parameter, combustion chamber peak spring pressure has increased more than before. Apart from the structural aspects of withstanding these loads, designer faces challenges of resolving thermal aspects of cylinder head. Methods to enhance the heat transfer without compromising load withstanding capability are being constantly explored. Conventional cylinder heads have got sat inner surface. In this paper we have suggested a modification in inner surface to enhance the heat transfer capability. To increase the heat transfer rate, inner same deck surface is configured as a curved and stepped surface instead of sat. We have reported the effectiveness of extend of curvature in the inner same deck surface in a different technical paper. Here, we are making a direct comparison between stepped and curved surface only. From this analysis it has been observed that curved surface reduces the ame deck temperature considerably without compromising the structural strength factors compared to step and sat surface.