Optimal Design of IC Engine Cooling Fins by Using Genetic Algorithm

2014 ◽  
Author(s):  
Terry Yan ◽  
Jason Yobby ◽  
Ravindra Vundavilli
Keyword(s):  
Heat Transfer ◽  
Genetic Algorithms ◽  
Optimal Design ◽  
Degrees Of Freedom ◽  
Combustion Engine ◽  
Local Heat Transfer ◽  
System Component ◽  
Cylinder Wall ◽  
Ic Engine ◽  
Engine Cooling

The analysis for optimal design of an air-cooled internal combustion engine cooling fin array by using genetic algorithms (GA) is presented in this study. Genetic Algorithms are robust, stochastic search techniques which are also used for optimizing highly complex problems. In this study, the fin array is of the traditional circular fin type, which is subject to ambient convective heat transfer. The parameters (degrees of freedom) selected for the analysis include the cylinder wall thickness-to-radius ratio, fin thickness, fin length, the number of fins, and the local heat transfer coefficient. By using a single objective GA procedure, the heat transfer through the fin arrays is set as the objective function to be optimized with each parameter varied within the physical ranges. Proper population size is selected and the mutations, cross-over and selection are conducted in the GA procedure to arrive at the optimal set of parameters after a certain number of generations. The GA proves to be an effective optimization method in the thermal system component designs when the number of independent variables is large.

scholarly journals Experimental and Parametric Study of Extended Fins In The Optimization of Internal Combustion Engine Cooling Using CFD

2012 ◽  
pp. 81-90
Author(s):  
J.Ajay Paul ◽  
Sagar Chavan Vijay ◽  
U. Magarajan ◽  
R.Thundil Karuppa Raj
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Internal Combustion Engine ◽  
Numerical Simulations ◽  
Parametric Study ◽  
Combustion Engine ◽  
Heat Transfer Characteristics ◽  
Engine Cooling ◽  
Fin Thickness ◽  
Annular Fins

In this experiment the single cylinder air cooled engines was assumed to be a set of annular fins mounted on a cylinder. Numerical simulations were carried out to determine the heat transfer characteristics of different fin parameters namely, number of fins, fin thickness at varying air velocities. A cylinder with a single fin mounted on it was tested experimentally. The numerical simulation of the same setup was done using CFD. The results validated with close accuracy with the experimental results. Cylinders with fins of 4 mm and 6 mm thickness were simulated for 1, 3, 4 &6 fin configurations.

scholarly journals Investigation of the Heat Transfer Process in Internal Combustion Engine Cylinders

2020 ◽  
pp. 266-274
Author(s):  
Volodumur Suvolapov ◽  
◽  
Andriy Novitskiy ◽  
Vasul Khmelevski ◽  
Oleksandr Bustruy ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Contact Layer ◽  
Internal Combustion ◽  
Temperature Fields ◽  
Cylinder Surface ◽  
Stationary Mode ◽  
Cylinder Wall ◽  
Engine Cylinder

The article analyzes scientific publications and literary studies of heat transfer processes in cylinders of internal combustion engines. The research of temperature fields in engines during their operation at different modes with the use of a software package and calculation module is presented. The results of modeling and thermo-metering in homogeneous and laminated engine cylinder liners are analyzed. Graphic dependencies and temperature distribution by cylinder wall thickness at maximum and minimum temperature on cylinder surface are given. On the basis of researches it is established that at laminating and pressing of inserts temperature fields in the engine cylinder change, temperature on an internal surface of the cylinder increases at laminating on 6,5 °С, and at pressing - on 4,5 °С. This is explained by the fact that the contact layer during plastification is in the zone of non-stationary mode, and when pressing the contact layer is in the zone of stationary mode and thus increases the thickness of the cylinder by 2 millimeters. It is established that the difference of minimum and maximum temperatures on the inner surface of the cylinder practically remains the same as that of a homogeneous cylinder. Thus, modeling becomes the most effective scientific tool in the development and implementation of long-term evaluation of options for improving ICE.

Conceptual Design and Optimal Torque Sharing Strategy for Hybrid Vehicles with Epicyclic Gear Trains

2012 ◽  
Vol 152-154 ◽  
pp. 759-764
Author(s):  
Nazim Mir-Nasiri
Keyword(s):  
Degrees Of Freedom ◽  
Combustion Engine ◽  
Power Sharing ◽  
Gear Train ◽  
Ic Engine ◽  
Power Sources ◽  
Epicyclic Gear ◽  
Exhaust Gas Emission ◽  
Wide Range ◽  
Sharing Strategy

The paper presents a novel approach in torque sharing between an internal combustion engine (IC engine) and two electrical motors for optimal drive of a hybrid vehicle. The concept of the system is realized by employing the three degrees of freedom (DOF) twin epicyclic gear train with specially selected gear ratios to satisfy an optimal power sharing strategy. The first stage of the train provides high torque from the IC engine and moderate torque from the motor M1. The second stage provides lower torque but higher speed from the motor M2. Such arrangement of power sources is achieved by carefully selecting of all the gear ratios in the train. The designed system is able to minimize the power usage of the IC engine and thus to minimize the exhaust gas emission, save cost of petrol as compared to normal petrol vehicle. It also provides a quite wide range of torque and speed values to drive the vehicle.

Computational modelling of convective heat transfer in a simulated engine cooling gallery

2007 ◽  
Vol 221 (9) ◽  
pp. 1147-1157 ◽  
Author(s):  
K Robinson ◽  
M Wilson ◽  
M J Leathard ◽  
J G Hawley
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Computational Study ◽  
Convective Heat Transfer Coefficient ◽  
Computational Modelling ◽  
Operating Conditions ◽  
Ic Engine ◽  
Engine Cooling ◽  
Cfd Models

Experimental data from internal combustion (IC) engines suggests that the use of proprietary computational fluid dynamics (CFD) codes for the prediction of coolant-side heat transfer within IC engine coolant jackets often results in underprediction of the convective heat transfer coefficient. An experimental and computational study, based on a coolant gallery simulator rig designed specifically to reproduce realistic IC engine operating conditions, has been conducted to explore this issue. It is shown that the standard ‘wall function’ approach normally used in CFD models to model near-wall conditions does not adequately represent some features of the flow that are relevant in convective heat transfer. Alternative modelling approaches are explored to account for these shortcomings and an empirical approach is shown to be successful; however, the methodology is not easily transferable to other situations.

Optimal Design of Suspension Parameters of Flexible Multibody Vehicle Model Based on ADAMS Software and Improved Genetic Algorithms

2006 ◽  
Author(s):  
Jingjun Zhang ◽  
Yang Sun ◽  
Ruizhen Gao
Keyword(s):  
Genetic Algorithms ◽  
Optimal Design ◽  
Degrees Of Freedom ◽  
Optimization Method ◽  
Rigid Bodies ◽  
The Other ◽  
Vehicle Model ◽  
Suspension Parameters ◽  
Adams Software ◽  
Better Than

In this paper a new method for the optimal design of suspension parameters of flexible mutibody vehicle model is presented. This method is developed based on the interface between the ADAMS software and the improved genetic algorithms in this paper. The 44 degrees of freedom flexible muitibody and the 33 degrees of freedom multi-rigid bodies vehicle model are chosen as examples for the optimal design of suspension parameters. The results show that the optimization method developed in this paper is better than the other methods.

scholarly journals Modelling of Automobile Radiator by Varying Structure and Materials

2020 ◽  
Vol 9 (2) ◽  
pp. 652-656
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Internal Combustion Engines ◽  
Cooling System ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Automotive Application ◽  
Simple Modification ◽  
Engine Cooling

Radiators used in the automotive application are a class of heat exchangers whose main purpose is to cool the coolant coming from the internal combustion engines. These coolants flow through tubes covered with fins that facilitate a faster way of heat transfer to the surrounding more efficiently. With the increase in efficiency of the engine cooling system it directly helps in the longevity of the engine in other words, the life of the internal combustion engine increases multifold times. Upon investigating we found different shapes that can be used to optimize the radiators efficiency. There are several other ways to improve the efficiency of a radiator. And these can be achieved by improving the surface area of the radiator, improving airflow through it, improving coolant property which flows through these tubes covered with fin all around and at last using alternate materials that prove to be more efficient than the present ones that are being used. The demand of the current times of climate change and energy crisis have paved way for improved heat transfer rates and designing radiators in smaller dimensions and sizes at the same time being more efficient than the previous generation of radiators. With the above conditions in mind, it has been found out that with a simple modification of changing the existing rectangular-shaped radiators into spiral-shaped ones thereby improving efficiency to improved levels, which finds its use in the current generation of vehicles which are benefitting from the improved rate of heat transfer taking place. The spiral radiator of copper tube used here is wound in two coils connected centrally. Spiral tubes of the radiator have circumferential fins. In this type of configuration, heat transfer rate will increase because of having a circumferential fin across the length of the spiral tube through which water flows. These design considerations have been done keeping in mind the major aims to achieve for this type of design and they are improving heat transfer rate and achieving compactness of shape of radiator. We also did Computational Fluid Dynamics or CFD Analysis to test the material properties for the application of heat transfer and how it fares against old materials.

Heat-Transfer Distribution Around a Cylinder in Pulsating Crossflow

1985 ◽  
Vol 107 (4) ◽  
pp. 976-982 ◽  
Author(s):  
C. E. Andraka ◽  
T. E. Diller
Keyword(s):  
Heat Transfer ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Cylinder Wall ◽  
Surface Boundary ◽  
Surface Boundary Condition ◽  
Shedding Frequency ◽  
Sinusoidal Flow ◽  
Layer Region ◽  
Temperature Surface

The effects of sinusoidal flow pulsations on the heat transfer from a cylinder to a crossflow at Re = 50,000 were investigated. A range of different pulsation amplitudes of up to 25% and frequencies both above and below the natural shedding frequency were used. The pulsating flow was clean and well organized. It had greater than 95% of the power at the fundamental frequency with a low turbulence level (less than 0.5%). The time-averaged local heat transfer was experimentally measured for a constant-temperature surface-boundary condition using a small heat flux gage in the cylinder wall. Distributions were obtained by rotating the cylinder through 180 deg. The experiments showed no significant increase of heat transfer due to the flow pulsation in either the wake or attached boundary layer region. Small local increases were found near the separation point.

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