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Measurement of spray characteristics using optical measurement methods
 Ďurdina, Lukáš ; Otáhal, Jan (oponent) ; Jedelský, Jan (vedoucí práce)
The present thesis deals with measurement of spray characteristics of two pressure–swirl atomizers for a combustion chamber of a small–sized jet engine investigated on a cold test bench by means of Particle Image Velocimetry (PIV) and Phase-Doppler Anemometry (PDA). The aim of these measurements is to investigate and compare the spray characteristics of these nozzles in order to elucidate the possible impacts of the design change on the nozzle operation in the combustion chamber. The theoretical part deals with fundamental concepts of liquid atomization, design and performance of pressure–swirl atomizers and description of principles of the used laser diagnostic techniques. Next part describes design and operation of the test bench. The experimental part is devoted to experimental set-up and digital image processing and post–processing techniques of the gathered data. Results contain velocity vector fields, axial velocity profiles and droplet size distributions for various operating conditions of both nozzles.
Úplný záznam
Measurement of spray characteristics using optical measurement methods
 Ďurdina, Lukáš ; Otáhal, Jan (oponent) ; Jedelský, Jan (vedoucí práce)
The present thesis deals with measurement of spray characteristics of two pressure–swirl atomizers for a combustion chamber of a small–sized jet engine investigated on a cold test bench by means of Particle Image Velocimetry (PIV) and Phase-Doppler Anemometry (PDA). The aim of these measurements is to investigate and compare the spray characteristics of these nozzles in order to elucidate the possible impacts of the design change on the nozzle operation in the combustion chamber. The theoretical part deals with fundamental concepts of liquid atomization, design and performance of pressure–swirl atomizers and description of principles of the used laser diagnostic techniques. Next part describes design and operation of the test bench. The experimental part is devoted to experimental set-up and digital image processing and post–processing techniques of the gathered data. Results contain velocity vector fields, axial velocity profiles and droplet size distributions for various operating conditions of both nozzles.
Úplný záznam

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