Browsing by Author "(ORCID 0000-0003-1652-782X & YÖK ID 239221) Ertunç, Özgür"
Now showing items 21-34 of 34
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Mass flow rate control of solenoid-based injectors
Qureshi, Muhammad Sarmad; Kara, Ahmet Burhan; Ertunç, Özgür; Bebek, Özkan (Sage, 2023-09)This paper presents a mass flow rate control method for solenoid-based injectors in open-loop, i.e. without physical sensor feedback. Measuring the mass flow rate in injectors is important because the performance of the ... -
Model-based optimization of CMP process parameters for uniform material removal selectivity in cu/barrier planarization
Akbar, Wazir; Ertunç, Özgür (IOP Publishing, 2022-02-01)Chemical mechanical planarization is a process of achieving planar surfaces in the semiconductor manufacturing industry. The planarization of a surface is achieved by material removal from the wafer surface. The material ... -
A new model for predicting the required pressure difference for pressure swirl atomizers
Nural, Ozan Ekin; Ertunç, Özgür; Hacıbekir, T.; Savcı, İ. H. (Europe, Institute for Liquid Atomization and Spray Systems, ILASS, 2020)Prior to this study an investigation is made to analyze the accuracies of the semi-empirical correlations of the previous studies by comparing them with a large number of experimental data which is extracted from the works ... -
Numerical and experimental analysis of impinging synthetic jets for cooling a point-like heat source
Glowienko, G.; Derlien, H.; Ertunç, Özgür; Delgado, A. (ASME, 2018-05-01)High power light emitting diodes (LEDs) being used for low and high beam in automotive lighting need active cooling of their heat sinks by radial or axial fans. But the moving elements of the fan cause abrasion, noise, and ... -
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 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 ... -
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 ... -
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 ... -
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 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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