dc.contributor
dc.contributor.advisor
dc.contributor.author	Cubreli, Gramoz
dc.contributor.other	Dančová Petra, doc. Ing. Ph.D. Skolitel : 57854
dc.date.accessioned	2022-12-20T04:48:54Z
dc.date.available	2022-12-20T04:48:54Z
dc.date.committed	2021-12-31
dc.date.defense	2022-11-22
dc.date.issued	2022-11-22
dc.date.submitted	2018-10-30
dc.date.updated	2022-11-24
dc.degree.level	Ph.D.
dc.description.abstract	This Ph.D. dissertation introduces and elaborates the optical technique known as Digital Holographic Interferometry (DHI) in the field of applied fluid mechanics for the purpose of investigating the properties and visualization of flowing gases and liquids. The work deals mostly with the general aspects of using digital holographic interferometry as the main technique of investigation, deepening in some of its technical aspects for data treatment and visualization. It gradually present the evolving process of studying different forms of temperature fields, based on the distribution of its refractive index, starting with simple 2D distribution toward 3D distribution that is treated with tomographic approach. It brings to light main concepts and possibilities of using this technique for the field of fluid mechanics.Apart the general theoretical background introduced in the beginning of this thesis, each chapter contains an introduction to some more theoretical and technical aspects of the optical setup and data treatment that are needed for a better and full understanding of the process of capturing, treating and presenting the data. General conclusions are drawn at the end of each chapter.Throughout our work, we have achieved a deviation below tenths of degree Celsius between the temperature registered from the thermocouples, ANSYS simulations and the one measured by the optical technique for the case of heat measurements in water, falling within 5% of error margin for the case of a 2D temperature field. For the case of a 3D temperature field from a pulsatile jet with water as its working fluid, we estimated that the relative uncertainty of the temperature field measurement near the orifice is below 5%, compared to the relative uncertainty increasing up to 15% further from the orifice. We also achieved an increase of the range of measurement for the case of two-wavelength digital holographic interferometry.Each investigation is accompanied with a whole-field picture of visualizing the temperature and other important properties of the fluid/gas under study, which is one of the main advantages of this optical technique.	cs
dc.description.abstract	This Ph.D. dissertation introduces and elaborates the optical technique known as Digital Holographic Interferometry (DHI) in the field of applied fluid mechanics for the purpose of investigating the properties and visualization of flowing gases and liquids. The work deals mostly with the general aspects of using digital holographic interferometry as the main technique of investigation, deepening in some of its technical aspects for data treatment and visualization. It gradually present the evolving process of studying different forms of temperature fields, based on the distribution of its refractive index, starting with simple 2D distribution toward 3D distribution that is treated with tomographic approach. It brings to light main concepts and possibilities of using this technique for the field of fluid mechanics.Apart the general theoretical background introduced in the beginning of this thesis, each chapter contains an introduction to some more theoretical and technical aspects of the optical setup and data treatment that are needed for a better and full understanding of the process of capturing, treating and presenting the data. General conclusions are drawn at the end of each chapter.Throughout our work, we have achieved a deviation below tenths of degree Celsius between the temperature registered from the thermocouples, ANSYS simulations and the one measured by the optical technique for the case of heat measurements in water, falling within 5% of error margin for the case of a 2D temperature field. For the case of a 3D temperature field from a pulsatile jet with water as its working fluid, we estimated that the relative uncertainty of the temperature field measurement near the orifice is below 5%, compared to the relative uncertainty increasing up to 15% further from the orifice. We also achieved an increase of the range of measurement for the case of two-wavelength digital holographic interferometry.Each investigation is accompanied with a whole-field picture of visualizing the temperature and other important properties of the fluid/gas under study, which is one of the main advantages of this optical technique.	en
dc.description.mark	S
dc.format	184
dc.format.extent
dc.identifier.signature	D 202200107
dc.identifier.uri	https://dspace.tul.cz/handle/15240/166919
dc.language.iso	an
dc.relation.isbasedon
dc.rights	Vysokoškolská závěrečná práce je autorské dílo chráněné dle zákona č. 121/2000 Sb., autorský zákon, ve znění pozdějších předpisů. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf a citační etikou https://knihovna.tul.cz/document/26	cs
dc.rights	A university thesis is a work protected by the Copyright Act. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one?s own expense. The use of thesis should be in compliance with the Copyright Act. https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf and the citation ethics https://knihovna.tul.cz/document/26	en
dc.rights.uri	https://knihovna.tul.cz/document/26
dc.rights.uri	https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf
dc.subject	Digital holographic interferometry	cs
dc.subject	temperature fields	cs
dc.subject	spatial-carrier	cs
dc.subject	Fourier Transform	cs
dc.subject	convection	cs
dc.subject	water	cs
dc.subject	pulsatile jets	cs
dc.subject	tomography	cs
dc.subject	Digital holographic interferometry	en
dc.subject	temperature fields	en
dc.subject	spatial-carrier	en
dc.subject	Fourier Transform	en
dc.subject	convection	en
dc.subject	water	en
dc.subject	pulsatile jets	en
dc.subject	tomography	en
dc.title	Digital Holographic Interferometry for Temperature Field Measurements in Flowing Gases and Liquids	cs
dc.type	disertační práce	cs
local.degree.abbreviation	Doktorský
local.degree.discipline	KSA4
local.degree.programme	Machines and Equipment
local.degree.programmeabbreviation	P2302
local.department.abbreviation	KEZ
local.faculty	Fakulta strojní	cs
local.faculty.abbreviation	FS
local.identifier.author	S16000549
local.identifier.stag	39850
local.identifier.verbis
local.identifier.verbis	aba189f7-773e-43a2-afb4-4e8e72790080
local.note.administrators	automat
local.note.secrecy	Povoleno ZverejnitPraci Povoleno ZverejnitPosudky
local.poradovecislo	107

Digital Holographic Interferometry for Temperature Field Measurements in Flowing Gases and Liquids

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