Akbulut, Bedia

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https://hdl.handle.net/11147/16025
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01. Izmir Institute of Technology
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NO POVERTY1
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ZERO HUNGER2
ZERO HUNGER
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GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
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QUALITY EDUCATION4
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GENDER EQUALITY5
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CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
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AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
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DECENT WORK AND ECONOMIC GROWTH8
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INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
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REDUCED INEQUALITIES10
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SUSTAINABLE CITIES AND COMMUNITIES11
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RESPONSIBLE CONSUMPTION AND PRODUCTION12
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CLIMATE ACTION13
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LIFE BELOW WATER14
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LIFE ON LAND15
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PEACE, JUSTICE AND STRONG INSTITUTIONS16
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PARTNERSHIPS FOR THE GOALS17
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  • Master Thesis
    Numerical Detection of Cavitation in Plunger Valves
    (01. Izmir Institute of Technology, 2020) Özkol, Ünver; Akbulut, Bedia; Özkol, Ünver; 01. Izmir Institute of Technology; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering
    Cavitation is a very serious problem for control valves. Besides noise and vibration, cavitation can seriously damage mechanical parts. Experimental costs for cavitation tests are high, especially when the difficulty of testing large sized valves is considered. For these reasons, developing a Computational Fluid Dynamics (CFD) model can be an attractive solution for predicting cavitation. Cavitation; is a phase change event where the bubbles that occur when the fluid pressure drops below the vapor pressure seriously damage the parts of the machines such as pumps, impellers, and valves. The first aim of this research is to determine the onset of cavitation by performing two-phase CFD simulations in plunger valves. Then, several cavitation cages are connected to observe the change at the beginning of cavitation. A cavitation cage is used to protect the valve and valve disc when downstream pressure is too low. As a result of the analysis, it was observed that the cavitation delayed using the cavitation cage. The second purpose of this research is to design an interface program that will present the Loss and Flow Coefficient diagrams obtained from tests and CFD analysis to the user. Each valve has its own flow coefficient. This depends on how the valve is designed to allow flow through the valve. Therefore, the main differences between the different flow coefficients are due to the valve type and of course the valve opening position. The flow coefficient is important to choose the best valve to use in a particular application.