Browsing by Author "Ertunç, Özgür"
Now showing items 41-56 of 56
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Numerical and experimental analysis of the flow and transition of free synthetic jets
Glowienko, R.; Derlien, H.; Ertunç, Özgür; Delgado, A. (IOP Publishing, 2019-04)In this paper, flow characteristics and the transition of synthetic jets are investigated numerically and experimentally. The investigated synthetic jets have a dimensionsless stroke length L-0/d of 146 and 167, an U-0 of ... -
Numerical and theoretical analysis of external gear pump
İmamoğlu, Deniz (2019-01-28)External gear pumps are one of the mostly used pump types in the uid power applications due to simplicity, low cost and long operation period. However, there are some disadvantages such as internal leakages, noise and ... -
Numerical investigation of multiphase flow inside a pressure swirl atomizer at the initial stage of injection
Razeghi, Alireza; Ertunç, Özgür (Begell House Inc., 2018)Pulse-mode operating atomizers are widely used in industry. This paper presents the fluid flow details and characteristics inside a pulse-mode operating pressure swirl atomizer (PSA). Transient flow simulations are performed ... -
Numerical investigation of the flame location of turbulent premixed combustion in a diffuser burner exposed to various turbulence intensities and turbulence length scales
Nazzal, Ibrahim Thamer; Ertunç, Özgür (Turkish Society of Thermal Science and Technology (TIBTD), 2018)This study aims to investigate the response of the flame location of a turbulent premixed flame that has been exposed to various turbulence intensities and turbulence length scales. A diffuser-type burner is used to reveal ... -
The penetration of acoustic cavitation bubbles into micrometer-scale cavities
Vaidya, H. A.; Ertunç, Özgür; Lichtenegger, T.; Delgado, A.; Skupin, A. (Elsevier, 2016)The penetration of acoustically induced cavitation bubbles in micrometer-scale cavities is investigated experimentally by means of high-speed photography and acoustic measurements. Micrometer-scale cavities of different ... -
Predicting the performance of pressure-swirl atomizers
Nural, Ozan Ekin; Ertunç, Özgür (Begell House Inc., 2018)The purpose of this study is to evaluate the semiempirical correlations that are found in the literature by comparing them with all of the applicable experimental data that are also taken from the literature. Presentation ... -
Simulations of droplet impacts on hydrophobic moving walls
Heidarifatasmi, Hosein (2017-08)Numerical simulations of water drop impact onto hydrophobic surfaces (Wax, Teflon) are carried out through usage of Eulerian multiphase model. Volume of fluid (VOF) model is used to capture the deformation of the water ... -
A solenoid injector based drop-on-demand system for generating large droplets
Coşar, Veli Can; Şen, Onur; Ertunç, Özgür; Qureshi, Muhammad Sarmad; Bebek, Özkan (American Institute of Physics Inc., 2023-09-01)This paper proposes a drop-on-demand (DOD) system that can produce single droplets of highly repeatable size in the order of 2 mm. This system utilizes an on-the-shelf solenoid injector used in automotive applications. The ... -
Structural and flow relationship of microfluidics pulsating high and low frequency jets
İkhlaq, Muhammad (2015-06)Synthetic jets are being investigated last several years. Researchers have been interested in its unique applications for a wide range of flow control to thermal management of electronics applications. Synthetic jets are ... -
Swelling phenomenon in rubber weatherstrip manufacturing under real process conditions imposed in a commercial extrusion line
Türkistanlı, Tarık; Ertunç, Özgür (Springer, 2023-01-06)We investigated the swelling under different process and boundary conditions in a commercial weatherstrip extrusion line. For the experimental investigations, we used two extrusion-dies and three compounds. An in-situ laser ... -
Thermal and radiative energy/exergy analyses of parabolic trough collector systems
Mohammed, Hayder Noori (2018-08)The concept of exergy is used to determine the maximum energy that can be extracted from a system. It is based on both the first and the second laws of thermodynamics and allows us to determine the irreversibilities ... -
Thermal underhood analysis of a heavy commercial vehicle using open source CFD package openFOAM
Ayhan, Çağatay Emre (2021-01-13)Underhood thermal design of heavy commercial vehicles has a large influence on the performance and reliability of the vehicles. Thermal design of underhood compartment is a challenging task with many constraints and design ... -
A torque matched aerodynamic performance analysis method for the horizontal axis wind turbines
Al-Abadi, A.; Ertunç, Özgür; Weber, H.; Delgado, A. (Wiley, 2013-11)An analysis method is developed to test the operational performance of a horizontal axis wind turbines. The rotor is constrained to the torque–speed characteristic of the coupled generator. Therefore, the operational ... -
Turbulence and flame interaction for control of flame location in diffuser combustor
Nazzal, Ibrahim Thamer Nazzal (2018-08)Achieving an appropriate flame location is desirable in many combustion system applications especial in the design of the combustion system. Given that the characteristics of turbulent flows influence flame behavior and ... -
Turbulence impact on wind turbines: experimental investigations on a wind turbine model
Al-Abadi, A.; Kim, Y. J.; Ertunç, Özgür; Delgado, A. (IOP Publishing, 2016)Experimental investigations have been conducted by exposing an efficient wind turbine model to different turbulence levels in a wind tunnel. Nearly isotropic turbulence is generated by using two static squared grids: fine ... -
Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles
Bal, M.; Kayansalçik, Gökhan; Ertunç, Özgür; Böke, Y. E. (Europe, Institute for Liquid Atomization and Spray Systems, ILASS, 2021-08-31)Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl ...
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