CFD and Thermomechanical Analysis on Effect of Curved Surface in IC Engine Cylinder Head

Abstract:

Next generation IC engines are designed to achieve high efficiency and high specific power. As a single most design drivingfactor, combustion pressure is increased more than before. This has major impact on the design aspects of cylinder head. Its featuresbecome more delicate to accommodate various elements. Thermal aspects composing of heat generation (by combustion); heat transfer(combustion, cooling water, intake and exhaust gas) makes the design more challenging. Methods to enhance the heat transfer andcontrolling body temperature are discussed by various authors. In this paper a high specific power engine cylinder head is analysedusing coupled field analysis. To enhance heat transfer, inner flame deck surface is configured as a curved surface instead of flat presentin the conventional cylinder heads. Effect of reduction in the cross sectional area due to curvature is analysed against flat surface. It isfound that this new approach reduces the flame deck temperature considerably without compromising the structural strength factors.CFD, steady state thermal and structural analysis has been carried out for four different cases to conclude the extend of effectivenessdue to curvature.

• Periodical: Applied Mechanics and Materials (Volume 852)
• Pages: 739-746
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.852.739
• Online since: September 2016
• Authors: S. Balaji*, Sarat Unnithan, A. Kumarasamy
• Keywords: Cylinder Head, Heat Rejection Rate, Inner Curved Surface

References

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