Investigation of Fin Thickness on Heat Transfer Characteristics of Engine

Abstract

Fins are one of the important key cooling elements. The main purpose of pin fins is to increase the rate of heat transfer to the surroundings by improving convection. The transferred heat will exist in the form of conduction, convection and radiation. If the temperature coefficient of heat transfer increases, the cooling rate will also increase. The main objective of our project is to increase the rate of heat transfer in different types of fins with different shapes.3D models were designed in Catia and tested in Ansys. Use the developed fins in various applications.

Introduction

I. INTRODUCTION

Heat transfer is a subject of general interest to students of engineering courses, practicing engineers and technicians engaged in the design, construction, testing and operation of the many forms of heat exchange equipment. heat required in science and industrial technology.

Electrical engineers apply their knowledge of heat transfer to the design of cooling systems for automobiles, generators and transformers. Chemical engineers deal with the evaporation, condensation, heating, and cooling of liquids. Understanding the laws of heat transfer flux is important for civil engineers who construct dams and structures, and for architects who design buildings. Mechanical engineers deal with heat transfer in internal combustion engines, steam generation, refrigeration, heating, and ventilation.

In order to estimate the cost, feasibility and size of the equipment needed to transfer a given amount of heat for a given duration, a detailed heat transfer analysis must be performed. The size of boilers, heaters, refrigerators and heat exchangers depends not only on the amount of heat to be transferred, but also on the rate at which it can be transferred under given conditions. Proper operation of equipment components such as turbine blades and gas turbine combustor walls depend on the ability to cool certain metal components by removing heat from surfaces in rapid succession. These various examples show that in almost all branches of engineering, one encounters heat transfer problems that cannot be solved by thermodynamic reasoning alone, but require analysis based on the science of heat transfer.

A. Selection of Material:

Aluminum was chosen as the fin material for further analysis by ANSYS. Aluminum is a very light metal with a specific weight. The use of aluminum in vehicles reduces dead weight and energy consumption while increasing load capacity. Aluminum is a good reflector of visible light and heat.

The main function of the fins is to dissipate the heat generated by the engine, essentially an engine cooling technique.

In terms of material selection, a material that can absorb engine heat at a higher rate and quickly dissipate it to the air passing through it would be preferred. Aluminum is an ideal material with this quality. It has excellent thermal conductivity, heat dissipation and heat dissipation performance.

The most common heatsink material is aluminum alloy, which has one of the highest thermal conductivity values at 229 W/mK but is mechanically more flexible copper has approximately twice the thermal conductivity of aluminum and absorbs heat faster and more efficiently.

But it is more expensive than aluminum. The thermal conductivity of copper decreases with increasing temperature, but in the case of aluminum, the thermal conductivity increases with increasing temperature. It is cheap and easy to extrude into fin extensions. Aluminium is good and efficient. Now a days, widely used material is Aluminium. Aluminium is quite light weighted than copper.

II. PROPERTIES OF FINS

1. High thermal conductivity
2. Lightweight
3. Castability
4. Corrosion-resistant

III. APPLICATIONS

1. Combined convection is symmetrical or asymmetrical heated passage used in various modern systems such as electronic equipments for cooling purpose.
2. The effect of wall heating on stability of low Reynolds Number flow in a horizontal tube is important in a variety of Engineering situations including compact heat exchangers, solar energy collector and heat exchanger designed for viscous fluid in chemical and food industries. Heat is transferred by combined convection as buoyancy influence becomes significant.
3. Study of unsteady mixed convection is very important in horizontal chemical vapor deposition (CVD) reactors.   CVD involves the deposition of molecules form fluid phase on to a substrate, with a deposition rate being governed by the rate of diffusion form fluid in the surface and by chemical kinetics.
4. Steady laminar flow of “power law” fluids past heated two-dimensional bodies is strongly influenced by the rate of fluid mass transfer at the value of buoyancy force.  This is important in the boundary layer controlling of airfoils, transpiration cooling of turbine blades, lubrication of ceramic machine parts and food processing.
5. Longitudinal fins attached at the heated bottom surface of parallel plate channel can enhance secondary flow and heat transfer with increase in “Rayleigh Number”

However, mixed convection and buoyancy driven secondary fluids also enhance the heat transfer above the forced convection level.  The combination of extended surface and mixed convection yields levels of heat transfer enhancement unattainable when either mechanism acts independently.

Natural and mixed convective waves generated by isolated thermal source are of interest in many practical problems such as positioning of heating elements in furnace and fire in enclosures and cooling of electronic circuitry.

IV. LITERATURE REVIEW

1. Computational Analysis of Heat Transfer through Fins with Different Types of Notches, K. Sathishkumar, K. Vignesh, N. Ugesh, P. B. Sanjeevaprasath, S.

In this paper it represents the Engine as one of the important components in an automobile which is subjected to high temperature and thermal stresses. In order to cool the engine, the fins are another component which are used to dissipate the heat from the Engine. Fins are generally used to increase the heat transfer rate from the system to the surroundings.

2. Analysis of Varying Geometry Structures of Fins using Radiators K. Chinnarasu1, M. Ranjithkumar, P. Lakshmanan, K. B. Hariharan, N. K. Vigneshwaran and S. Karan

In this literature it presents as radiators are heat exchangers used to transfer thermal energy from one medium to another medium. In the existing plain fins type radiator are commonly used, which are usually set up in a crossflow arrangement made up of aluminum and copper alloy. Powerful fan and water pump is accompanied in this to greatly improve heat dissipation rate. For higher cooling capacity of radiator, addition of fins is one of the approaches to increase the cooling rate of the radiator.

3. Finite Element Thermo-Structural Methodology for Investigating Diesel Engine Pistons with Thermal Barrier Coating, Paolo Baldissera, Cristiana Delprete, Politecnico di Torino

In this paper it presents a combustion engine application, metallic materials have been widely employed due to their properties castability and machinability with accurate dimensional tolerances, good mechanical strength even at high temperatures, wear resistance, and affordable price.

However, the high thermal conductivity of metallic materials is responsible for consistent losses of thermal energy and has a strong influence on pollutant emission. A possible approach for reducing the thermal exchange requires the use of thermal barrier coating (TBC) made by materials with low thermal conductivity and good thermo-mechanical strength.

4.  J.-J. Shu, I. Pop, “Thermal interaction between free convection and forced convection along a vertical conducting wall, “International Journal of Heat and Mass Transfer .

In this journal it presents the conjugate heat transfer across a vertical finite wall separating two forced and free convection flows at different temperatures. It is assumed that the heat conduction in the wall is only in the transversal direction. He also assumed that countercurrent boundary layers are formed on both sides of the wall. The governing equations of this problem and their corresponding boundary conditions are all cast into a dimensionless form by using a non-similarity transformation. These resulting equations, which are singular at the points nc. 0 and 1, are solved numerically using a very efficient singular perturbation method. The effects of the resistance parameters and of the Prandtl numbers on heat transfer characteristics are investigated.

5. Wei Du, Lei Luo, Songtao Wang, Xinghong Zhang ‘Effect of the dimple location and rotating number on the heat transfer and flow structure in a pin finned channel’,

The problem of natural convection heat transfer from fin arrays with inclination is studied experimentally and theoretically to find the effect of inclination of the base of the fin array on heat transfer rate.

6. Heat Transfer Analysis by CFD Simulation for Different shapes of Fins, Mohsin A. Ali and Prof. (Dr.) S.M Kherde

In this article it represents an air-cooled motorcycle engine releases heat to the atmosphere through the mode of forced convection to facilitate this, fins are provided on the outer surface of the cylinder. The heat transfer rate depends upon the velocity of the vehicle, fin geometry and the ambient temperature. Insufficient removal of heat from engine will lead to high thermal stresses and lower engine efficiency. The cooling fins allow the wind to move the heat away from the engine. Low rate of heat transfer through fins is the main problem of air-cooling system.

V. ACKNOLEDGEMENT

Presentation inspiration and motivation have always played a key role in the success of any venture. We express our sincere thanks to our BE Project Guide Prof. Jitendra. B. Satpute and for his encouragement and support throughout our project, especially for the useful suggestions. We would like to thank Prof. P.V. Bute, Head of Mechanical Engineering Department for his unwavering support during the entire course of this final year project work.

Last but not least, many thanks go to the seminar guide, Prof. Mukesh Mane who has given his full effort in guiding the goal as well as his encouragement to maintain our progress in track. I would appreciate the guidance given by other supervisor as well as the panels especially in our seminar presentation that has improved our presentation skills by their comments and tips.

Conclusion

1) In this study, CFD simulations were performed on different fins to obtain an optimized model. Initially, CFD simulations were performed to obtain the best and most efficient shapes to list circular, triangular and parabolic fin targets around the engine. 2) It was observed from CFD simulations that the parabolic fins were the most efficient design in the current study, with greater heat dissipation and the standard design size material that was ultimately used for design purposes. manufacturing and testing.

References

[1] Computational Analysis of Heat Transfer through Fins with Different Types of Notches, K. Sathishkumar, K. Vignesh, N. Ugesh, P. B. Sanjeevaprasath, S. Balamurugan, International Journal of Advanced Engineering Research and Science (IJAERS) [Vol-4, Issue-2, Feb- 2017], ISSN: 2349-6495(P) | 2456-1908(O) [2] Analysis of Varying Geometry Structures of Fins using Radiators K. Chinnarasu1, M. Ranjithkumar, P. Lakshmanan, K. B. Hariharan, N. K. Vigneshwaran and S. Karan, Journal of Applied Fluid Mechanics, Vol. 11, Special Issue, pp. 115-119, 2018. Selected papers from International Conference on Newer Techniques and Innovations in Mechanical Engineering (ICONTIME 2K18), 2018 Available online at www.jafmonline.net, ISSN 1735-3572, EISSN 1735-3645. [3] Finite Element Thermo-Structural Methodology for Investigating Diesel Engine Pistons with Thermal Barrier Coating, Paolo Baldissera, Cristiana Delprete, Politecnico di Torino, Italy, SAE International by SAE MOBILUS Open Platform, Thursday, January 10, 2019 [4] [4] J.-J. Shu, I. Pop, “Thermal interaction between free convection and forced convection along a vertical conducting wall, “International Journal of Heat and Mass Transfer [5] Wei Du, Lei Luo, Songtao Wang, Xinghong Zhang ‘Effect of the dimple location and rotating number on the heat transfer and flow structure in a pin finned channel’, “International Journal of Heat and Mass Transfer 127 (2018) 111–129” Published on 13 August 2018 [6] Heat Transfer Analysis by CFD Simulation for Different shapes of Fins, Mohsin A. Ali and Prof. (Dr.) S.M Kherde, International Journal for Research in Applied Science & Engineering Technology (IJRASET), Volume 3 Issue II, February 2015 ISSN: 2321-9653 [7] Design Modification and Analysis of Two-Wheeler Engine Cooling Fin, Rashin Nath.KK, Jayee K Varghese, International Journal of Engineering Research in Mechanical and Civil Engineering (IJERMCE) Vol 2, Issue 7, July 2017, ISSN 2456-1290 [8] Analysis of I.C. Engine Fins for Effective Cooling Performance, Akash M Vyas Ruchir Parikh, IJSTE - International Journal of Science Technology & Engineering | Volume 5 | Issue 1 | July 2018 ISSN 2349-784 [9] Heat transfer simulation of motorcycle fins under varying velocity using CFD method [10] K.Shahril, Nurhayati Binti Mohd Kasim, and M.Sabri, 2nd InternationalConferenceonMechanicalEngineeringResearch(ICMER2013) IOP Publishing IOP Conf. Series :Materials Science and Engineering 50 (2013) [11] Thermal Analysis of Engine Fins with Different Geometries, L.Natrayan , G.Selvaraj , N.Alagirisamy , M.S.Santhosh, International Journal of Innovative Research in Science, Engineering and Technology, Vol. 5, Issue 5, May 2016 [12] Heat Transfer Simulation by CFD from Fins of an Air-Cooled Motorcycle Engine under Varying Climatic Conditions, Pulkit Agarwal, Mayur Shrikhande and P. Srinivasan, Proceedings of the World Congress on Engineering 2011 Vol III WCE 2011, July 6 - 8, 2011, London, U.K.

Copyright

Copyright © 2023 Ankita Taur, Dhanashri Shinde, Avinash Taur, Prashant Deore, Jitendra Satpute. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.