|
|
Response surface method in connection with CFD for shape optimization
Pleva, František ; Štefan, David (referee) ; Rudolf, Pavel (advisor)
This thesis is focused on shape optimization of Venturi´s nozzle with optimization method called response surface method. The first part of this work is concerned with the description of this method as well as explaining the basic principle. Furthermore, there is an explanation of the application of this method in synchronicity with CFD and its operating algorithm. The second part of this thesis is then focused on simple example with plane wing and simplified optimization of Venturi´s nozzle in which this method was tested. In the third part there is described full multiparameter shape optimalization of the nozzle for two geometries.
|
|
|
Suspension flow modeling
Hideghéty, Attila ; Koutný, Luděk (referee) ; Rudolf, Pavel (advisor)
Diplomová práce se zabývá prouděním v hydrocyklónu. Hydrocyklón je separační stroj, kterým slouží k oddělování pevných částice z kapaliny (nejčastěji z vody). Díky tangenciálnímu vstupu do zařízení nastává silné vířivé proudění, které způsobuje přisávání vzduchu přes horní a dolní výtok. Toto vzduchové jádro hraje důležitou roli v separaci částic. Výpočty jsou provedeny pomoci CFD.
|
|
|
Multiphase CFD simulation of spiral vortex in vaneless swirl generator
Zatloukal, Filip ; Burda, Radim (referee) ; Štefan, David (advisor)
This thesis deals with multiphase CFD simulation of spiral vortex in bladeless swirl generator. Spiral vortex formed in the draft tube of hydraulic turbine is called “vortex rope”. Vortex rope is formed when the turbine is forced to operate in off-design conditions. Assessment of swirl generators used for the study of vortex ropes is presented. The multiphase CFD simulations are carried out for the bladeless swirl generator with use of Reynolds stress turbulence model in ANSYS Fluent software. The results from calculations are compared with available experimental data previously measured on this particular swirl generator. The main focus is on detailed analysis of velocity field in the diffusor part of the generator where the vortex appears. Experimentally estimated swirl number is compared with the one evaluated from simulation. The swirl number is also monitored along the length of diffuser and downstream. Finally, the synchronous and asynchronous pressure pulsations are studies by means of Fast Fourier Transformation.
|
|
|
Multiphase CFD simulation of spiral vortex in vaneless swirl generator
Zatloukal, Filip ; Burda, Radim (referee) ; Štefan, David (advisor)
This thesis deals with multiphase CFD simulation of spiral vortex in bladeless swirl generator. Spiral vortex formed in the draft tube of hydraulic turbine is called “vortex rope”. Vortex rope is formed when the turbine is forced to operate in off-design conditions. Assessment of swirl generators used for the study of vortex ropes is presented. The multiphase CFD simulations are carried out for the bladeless swirl generator with use of Reynolds stress turbulence model in ANSYS Fluent software. The results from calculations are compared with available experimental data previously measured on this particular swirl generator. The main focus is on detailed analysis of velocity field in the diffusor part of the generator where the vortex appears. Experimentally estimated swirl number is compared with the one evaluated from simulation. The swirl number is also monitored along the length of diffuser and downstream. Finally, the synchronous and asynchronous pressure pulsations are studies by means of Fast Fourier Transformation.
|
|
|
Response surface method in connection with CFD for shape optimization
Pleva, František ; Štefan, David (referee) ; Rudolf, Pavel (advisor)
This thesis is focused on shape optimization of Venturi´s nozzle with optimization method called response surface method. The first part of this work is concerned with the description of this method as well as explaining the basic principle. Furthermore, there is an explanation of the application of this method in synchronicity with CFD and its operating algorithm. The second part of this thesis is then focused on simple example with plane wing and simplified optimization of Venturi´s nozzle in which this method was tested. In the third part there is described full multiparameter shape optimalization of the nozzle for two geometries.
|
|
|
Suspension flow modeling
Hideghéty, Attila ; Koutný, Luděk (referee) ; Rudolf, Pavel (advisor)
Diplomová práce se zabývá prouděním v hydrocyklónu. Hydrocyklón je separační stroj, kterým slouží k oddělování pevných částice z kapaliny (nejčastěji z vody). Díky tangenciálnímu vstupu do zařízení nastává silné vířivé proudění, které způsobuje přisávání vzduchu přes horní a dolní výtok. Toto vzduchové jádro hraje důležitou roli v separaci částic. Výpočty jsou provedeny pomoci CFD.
|
guest ::
