Yazar "Sarper, B." seçeneğine göre listele

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    A numerical investigation on a liquid-cooled battery thermal management system: Effect of inlet temperature and flow rate
    (Institute of Physics, 2024) Birinci, S.; Albayrak, M.; Yazici, M.Y.; Sarper, B.; Aydin, O.
    Battery thermal management systems (BTMSs) and their stable operation are crucial for safety and efficiency of electrical vehicles. A BTMS utilized a cold plate is proposed in this paper for cooling of a cylindrical Li-ion Battery Pack (BP) arranged in 2×18 layout. The main focus of the study is on the effects of cooling fluid inlet temperature to cooling efficiency, and it is numerically investigated for 2C discharge rate at various flow rates from 0.1 to 1.0 l/min. The maximum temperature difference (ΔT max ) inside the BP and the maximum cell temperature (Tmax ) are analyzed via ANSYS Fluent software. Based on the comprehensive analysis of all system evaluation criteria, it can be concluded that the optimum flow rate is 0.5 l/min, and the optimum inlet temperature is 20 °C. © Published under licence by IOP Publishing Ltd.
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    Experimental and numerical convective heat transfer performance analysis of a confined impinging round jet with triangular tabs under crossflow influence
    (Institute of Physics, 2024) Saglam, M.; Birinci, S.; Sarper, B.; Aydin, O.
    In this study convective heat transfer performance of a confined impinging round jet with/without nozzle tabs under channel crossflow is investigated experimentally and numerically for a wall mounted heated module. Numerical investigations are carried out for different jet to crossflow velocity ratios (Vr) and compared to experimental data. Four different Vr values (5,6,8, and 10) are tested for single target plate distance to jet nozzle diameter ratio (H/D=8). ANSYS Fluent software is used for numerical simulations while infrared thermography is utilized for experimental investigations. Surface temperature values of the wall mounted module are obtained and presented along with complex flow structures obtained via numerical simulations. Results show that crossflow has decisive effect on temperature distribution on the component. By inserting triangular tabs to the nozzle exit, it is possible to further decrease the surface temperature of the module and minimize the crossflow caused jet deflection. The addition of triangular tabs resulted in a significant increase of up to 10% in the mean Nusselt number on the top surface of the module at Vr=10. © Published under licence by IOP Publishing Ltd.
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    Jet Impingement Cooling of Electronic Modules: Effect of the Nozzle Position
    (Toronto Metropolitan University, 2023) Albayrak, M.; Sarper, B.; Erdinc, M.T.; Aydin, O.
    In this study, jet impingement cooling of electronic modules with a series of jet nozzles is studied numerically. Three-dimensional numerical simulations are conducted for two alternative jet Reynolds numbers (Re! =8568 and 14023) at various dimensionless nozzle positions (s! ⁄b=0.166-0.5) and validated with experimental data. The study focuses on evaluating the influence of nozzle position on the temperature distribution and local and average heat transfer characteristics on the module surfaces. As a consequence of the study, it is determined that the position of the nozzles has a substantial influence on the local and average heat transfer characteristics, and the convective heat transfer is always greater in the impingement region than in the other regions of the modules. © 2023, Toronto Metropolitan University. All rights reserved.
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    Numerical Investigation of the Blood Flow in an Idealized Stenosed Left Coronary Artery: Effect of the Bifurcation Angle
    (Toronto Metropolitan University, 2023) Muftuogullari, A.; Albayrak, M.; Suner, M.; Sarper, B.
    In this study, the effects of bifurcation angle on blood hemodynamics in an idealized left coronary artery with 50% stenoses (50%) in each branch are investigated numerically in the transient regime. The study is carried out with 30º, 75º and 120º of bifurcation angle, and the research focuses on the impacts of bifurcation angle on wall shear stress (WSS) and velocity distribution. Blood is presumed to be non-Newtonian, and the Carreau viscosity model is utilized. As a consequence of the study, it is revealed that the maximum value of WSS increases, and flow disturbances and separations become more pronounced as the bifurcation angle becomes sharper. © 2023, Toronto Metropolitan University. All rights reserved.
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    The influence of cold plate height on thermal management of a liquid-cooled battery pack
    (Institute of Physics, 2024) Birinci, S.; Albayrak, M.; Saglam, M.; Sarper, B.; Aydin, O.
    This study focuses on the numerical investigation of the cooling efficiency of a cold plate with different heights for a Li-ion battery pack. The battery pack is arranged in a 2×18 configuration and consists of cylindrical 18650 cells. A new cold plate design is presented for this purpose, and the thermal performance of the system is evaluated under various operating scenarios. Five-volume flow rates (0.1-1.0 l/min) and four distinct cold plate heights (30-40-50-60 mm) are investigated for the 2C discharge rate using ANSYS Fluent software. The study investigates several configurations to establish the maximum temperature difference within the BP, maximum temperature of the BP, pressure drop, and cooling efficiency. As a result of the simulations the ideal flow rate is founded within the range of 0.5-0.75 l/min and a cold plate height of 50 mm is selected as the most favorable design configuration. © Published under licence by IOP Publishing Ltd.