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Atomization mechanisms of liquid fuels
Buzík, Jiří ; Bělohradský, Petr (referee) ; Broukal, Jakub (advisor)
The bachelor thesis deals with the atomization of liquid fuels and their atomizers and mechanisms which are concerned in atomization. The main purpose of this thesis is to describe the problems that are connected with the atomization. The author gives information about the primary and secondary decomposition of liquid. One part of the thesis is the software which focuses on the statistic evaluation and comparison of information which are performed by available experiments and numeric calculations.
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Experimental Analysis of the Liquid Breakup Process of an Effervescent Atomizer
Zaremba, Matouš ; Hyhlík, Tomáš (referee) ; Hájek, Jiří (referee) ; Jedelský, Jan (advisor)
The thesis deals with experimental research of mechanism of liquid breakup at twin-fluid atomizers. Four different atomizers were examined at the beginning of the research. Two of them were of standard design (Y-jet and effervescent nozzles), and the rest two atomizers were developed as a part of the thesis (so called CFT and inversed effervescent atomizers). Results show that only the inversed effervescent atomizer was capable of generating stable spray under examined conditions due to the specific breakup mechanism. This mechanism is similar to what was observed in effervescent atomizers. However, the mixing process inside the inversed effervescent atomizer is very different. The specific breakup mechanism was then defined as the main scope of the thesis. It was investigated by the high-speed imaging. The images were then processed by proper orthogonal decomposition and by fast Fourier transformation. Spray spatial development was examined using phase Doppler anemometer. The data was analyzed to describe the dynamics of the spray. A detailed description of the breakup mechanism is made from the combination of the experimental and post-processing techniques. The thesis brings new insight into the understanding of the liquid breakup mechanism and shows a potential for a further development of the inversed effervescent atomizer.
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Experimental Analysis of the Liquid Breakup Process of an Effervescent Atomizer
Zaremba, Matouš ; Hyhlík, Tomáš (referee) ; Hájek, Jiří (referee) ; Jedelský, Jan (advisor)
The thesis deals with experimental research of mechanism of liquid breakup at twin-fluid atomizers. Four different atomizers were examined at the beginning of the research. Two of them were of standard design (Y-jet and effervescent nozzles), and the rest two atomizers were developed as a part of the thesis (so called CFT and inversed effervescent atomizers). Results show that only the inversed effervescent atomizer was capable of generating stable spray under examined conditions due to the specific breakup mechanism. This mechanism is similar to what was observed in effervescent atomizers. However, the mixing process inside the inversed effervescent atomizer is very different. The specific breakup mechanism was then defined as the main scope of the thesis. It was investigated by the high-speed imaging. The images were then processed by proper orthogonal decomposition and by fast Fourier transformation. Spray spatial development was examined using phase Doppler anemometer. The data was analyzed to describe the dynamics of the spray. A detailed description of the breakup mechanism is made from the combination of the experimental and post-processing techniques. The thesis brings new insight into the understanding of the liquid breakup mechanism and shows a potential for a further development of the inversed effervescent atomizer.
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|
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Atomization mechanisms of liquid fuels
Buzík, Jiří ; Bělohradský, Petr (referee) ; Broukal, Jakub (advisor)
The bachelor thesis deals with the atomization of liquid fuels and their atomizers and mechanisms which are concerned in atomization. The main purpose of this thesis is to describe the problems that are connected with the atomization. The author gives information about the primary and secondary decomposition of liquid. One part of the thesis is the software which focuses on the statistic evaluation and comparison of information which are performed by available experiments and numeric calculations.
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