International Research Journal of Engineering and Technology (IRJET) Volume: 12 Issue: 05 | May 2025 www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Design Modifications of Cylinder Head Fins for Two-Wheeler Engine through Geometrical and Material Analysis Mrs. Dhanashree D.Pise1, Dr. Himadri Majumder2 1Student M.Tech. (CADME), Department of Mechanical Engineering, G H Raisoni College of Engineering &
Management Pune, India
2 Guide, Department of Mechanical Engineering, G H Raisoni College of Engineering & Management Pune, India
-------------------------------------------------------------------------***-----------------------------------------------------------------------Abstract ____ The primary objective of this study is to analyze and simulate the effects of fin geometry and material selection on the temperature distribution and heat flux of the Honda SP 125 engine cylinder fins. Various fin geometries were considered, including rectangular, slotted rectangular, circular, slotted circular, angular, and longitudinal fins, all with a uniform thickness of 2.5 mm. Among these, the circular fins with perforations demonstrated superior heat transfer efficiency and an advantageous power-to-weight ratio. Based on this optimal geometry, different materials— Aluminum 6082, AL204, Cast Iron, Magnesium Alloy AZ31, and Beryllium Oxide—were evaluated. 3D models were developed using SolidWorks and subsequently analyzed using ANSYS 16.2 under steady-state conditions. Finite Element Analysis (FEA) was performed to examine heat distribution and heat flux across all models. The findings indicate that Beryllium Oxide exhibits the highest thermal performance. The results were compared to determine the geometry and material combination that yields the maximum heat flux.
compared to other shapes like rectangular or triangular ones. Additionally, selecting materials with high thermal conductivity—such as aluminum alloy 6063-T6—has been found to significantly improve cooling effectiveness while preserving the structural strength of the fins.
KeywordsFins, Heat transfer, Aluminium 6082, Beryllium oxide, Ansys.
component to enhance heat transfer between the object and its surroundings, primarily by boosting convective heat exchange. The rate at which heat is transferred depends on conduction, convection, and radiation. Heat transfer can be improved by increasing the temperature difference between the surface and its environment, enhancing the convective heat transfer coefficient, or expanding the surface area. Since adjusting the temperature difference or convection coefficient may not always be practical or costeffective, incorporating fins offers a more feasible and economical alternative by enlarging the surface area. Common applications include circumferential fins on motorcycle engine cylinders and fins on condenser tubes in refrigerators.Maintaining an appropriate temperature distribution within a spark ignition (SI) engine is crucial for ensuring efficient operation and maximizing thermal efficiency. Engines must operate within specific thermal limits to perform optimally. Fins play a key role in this process by facilitating heat dissipation and preventing the engine from overheating. They act as a heat sink, protecting the engine from thermal damage. The number and size of fins on an engine cylinder generally correlate with the engine’s capacity—higher-capacity engines typically require more fins to manage the increased heat. This cooling mechanism is essential for preventing thermal failure of both the engine and the lubricating oil, ensuring long-term reliability and performance.
Managing heat effectively in internal combustion engines is especially important in two-wheelers to maintain efficiency, dependability, and long-term performance. Aircooling is the most commonly used method in these vehicles because of its simple construction, low cost, and high durability. In such systems, heat produced during combustion is mainly dispersed through fins attached to the cylinder head. Engine cooling performance is heavily influenced by fin design, including their geometry, quantity, size, and the material selected. Optimizing these elements involves a trade-off—while adding more fins or enlarging their surface area can enhance heat dissipation, it can also increase the engine’s overall weight, which negatively affects the crucial power-to-weight ratio in two-wheelers. Furthermore, aspects like fin thickness, spacing, and alignment need to be carefully designed to ensure unobstructed airflow and efficient convective heat transfer.Recent research highlights that adding perforations to fins can enhance cooling by inducing turbulence and breaking up thermal boundary layers. Circular perforations, in particular, have demonstrated better heat transfer performance and weight reduction © 2025, IRJET
|
Impact Factor value: 8.315
|
Considering these factors, the objective of this study is to conduct a comprehensive analysis of cylinder head fin designs in two-wheeler engines by examining different geometries and materials. Using computational modeling and simulation tools, the research evaluates multiple fin shapes, material options, and perforation layouts to identify configurations that enhance heat dissipation while keeping weight and production complexity low. The outcomes of this work aim to support advancements in engine cooling technologies and contribute to wider goals such as improved fuel economy, lower emissions, and environmentally sustainable transportation solutions.
1.1 Fins: A fin is an extended surface added to a
ISO 9001:2008 Certified Journal
|
Page 1219