Time-resolved transient convective and conjugate heat transfer experiments using IR thermography:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
München
Verlag Dr. Hut
2020
|
| Edition: | 1. Auflage |
| Series: | Thermodynamik
|
| Subjects: | |
| Online Access: | Inhaltstext http://www.dr.hut-verlag.de/978-3-8439-4413-7.html Inhaltsverzeichnis |
| Physical Description: | xxx, 218 Seiten Illustrationen, Diagramme |
| ISBN: | 9783843944137 384394413X |
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| 245 | 1 | 0 | |a Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |c Stefan Brack |
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| 502 | |b Dissertation |c Universität Stuttgart |d 2020 | ||
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| 653 | |a Infrared thermography | ||
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Record in the Search Index
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|---|---|
| adam_text | Contents
List of Figures xi
List of Tables xvii
List of Symbols xix
Abstract xxvii
Kurzzusammenfassung xxix
1 Introduction 1
1 1 Motivation 1
1 2 State of research 4
121 Experimental investigations 7
122 Analytical investigations 9
123 Experimental facilities 10
124 Evaluation methods for heat transfer 11
125 Evaluation methods for the wall shear stress 15
1 3 Objectives 17
vii
Contents
2 Evaluation methods for transient heat transfer experiments
2 1 Primary quantities heat flux and heat transfer coefficient ?
211 ID heat conduction situation with a time-independent
heat transfer coefficient j,
212 3D heat conduction situation with a time-independent
heat transfer coefficient j
213 ID heat conduction situation with a time-dependent heat
transfer coefficient jj
214 3D heat conduction situation with a time-dependent heat
transfer coefficient 21
2 2 Secondary quantities 1
221 Fluid reference temperature 30
222 Wall shear stress 31
223 Dimensionless numbers and airflow gas properties 34
3 Fundamentals of measurement techniques 31
3 1 Infrared thermography 37
311 Thermal radiation 31
312 Detection of thermal radiation 41
3 2 Hot-wire anemometry and thermometry 42
321 Measurement principle 42
322 Airflow velocity measurement 44
323 Airflow temperature measurement 45
3 3 Thermocouples 46
331 Measurement principle 46
332 Surface temperature measurement 48
333 Airflow temperature measurement 49
3 4 Thermochromic liquid crystals 53
4 Experimental setup 53
4 1 Test facility 53
411 Air supply system 54
412 Test section 55
413 Optical access for the infrared camera 56
414 The vortex generator 58
4 2 Measurement equipment 59
421 Infrared camera 59
422 Thermocouples 60
423 Hot-wire anemometry and thermometry 62
424 Pressure measurements * 64
425 Synchronization of measurements 64
viii
Contents
4 3 Airflow control system 65
431 Mesh heater 65
432 Adjustable vanes 65
433 Operating range 68
5 Qualification of measurement techniques 71
5 1 Consideration of magnification and distortion compensation of
images 71
5 2 In situ temperature calibration of the infrared camera 73
5 3 Stationary temperature calibration 76
531 Hot-wire thermometry 76
532 Thermocouples 76
533 Thermochromic liquid crystals 78
5 4 Influence of heat transfer on airflow thermocouples 80
541 Heat radiation 80
542 Heat conduction 81
543 Forced convection 84
6 Validation of experimental approaches 93
6 1 Inlet velocity profiles 93
6 2 Airflow control system 97
6 3 Comparison of TLC and IR heat transfer measurements 104
7 Application of experimental approaches 115
7 1 Periodically pulsating airflow temperature experiments 116
711 Exemplary results for a pulsation frequency of 0 1 Hz 116
712 Influence of pulsation frequency on the heat transfer
coefficient 120
713 Influence of pulsation frequency on the amplitude and
the phase shift of the surface heat flux and the surface
temperature 123
7 2 Periodically pulsating airflow velocity experiment 129
721 Temporal heat transfer behavior 130
722 Extrema of the heat transfer coefficient distribution 136
723 Heat transfer augmentation 138
7 3 Operation point variation experiment 139
731 Surface temperature response 140
732 Temporal heat transfer behavior 144
7 4 Wall shear stress 146
741 Input quantities and resulting wall shear stress field 148
742 Influence of the Lagrange parameter 153
ix
Contents
743 Influence of the evaluation point in time
8 Conclusions ^
Bibliography ^
Appendix
A 1R camera in situ calibration with automatic pixel assignment 115
B Inlet velocity profiles HI
C Radiation balance of the test section 191
D Emittance of black paint and TLC coating 191
E Influence of the TLC indication on the infrared thermography 201
F Uncertainty analysis 201
|
| adam_txt |
Contents
List of Figures xi
List of Tables xvii
List of Symbols xix
Abstract xxvii
Kurzzusammenfassung xxix
1 Introduction 1
1 1 Motivation 1
1 2 State of research 4
121 Experimental investigations 7
122 Analytical investigations 9
123 Experimental facilities 10
124 Evaluation methods for heat transfer 11
125 Evaluation methods for the wall shear stress 15
1 3 Objectives 17
vii
Contents
2 Evaluation methods for transient heat transfer experiments
2 1 Primary quantities heat flux and heat transfer coefficient ?
211 ID heat conduction situation with a time-independent
heat transfer coefficient j,
212 3D heat conduction situation with a time-independent
heat transfer coefficient j
213 ID heat conduction situation with a time-dependent heat
transfer coefficient jj
214 3D heat conduction situation with a time-dependent heat
transfer coefficient 21
2 2 Secondary quantities 1
221 Fluid reference temperature 30
222 Wall shear stress 31
223 Dimensionless numbers and airflow gas properties 34
3 Fundamentals of measurement techniques 31
3 1 Infrared thermography 37
311 Thermal radiation 31
312 Detection of thermal radiation 41
3 2 Hot-wire anemometry and thermometry 42
321 Measurement principle 42
322 Airflow velocity measurement 44
323 Airflow temperature measurement 45
3 3 Thermocouples 46
331 Measurement principle 46
332 Surface temperature measurement 48
333 Airflow temperature measurement 49
3 4 Thermochromic liquid crystals 53
4 Experimental setup 53
4 1 Test facility 53
411 Air supply system 54
412 Test section 55
413 Optical access for the infrared camera 56
414 The vortex generator 58
4 2 Measurement equipment 59
421 Infrared camera 59
422 Thermocouples 60
423 Hot-wire anemometry and thermometry 62
424 Pressure measurements * ' 64
425 Synchronization of measurements 64
viii
Contents
4 3 Airflow control system 65
431 Mesh heater 65
432 Adjustable vanes 65
433 Operating range 68
5 Qualification of measurement techniques 71
5 1 Consideration of magnification and distortion compensation of
images 71
5 2 In situ temperature calibration of the infrared camera 73
5 3 Stationary temperature calibration 76
531 Hot-wire thermometry 76
532 Thermocouples 76
533 Thermochromic liquid crystals 78
5 4 Influence of heat transfer on airflow thermocouples 80
541 Heat radiation 80
542 Heat conduction 81
543 Forced convection 84
6 Validation of experimental approaches 93
6 1 Inlet velocity profiles 93
6 2 Airflow control system 97
6 3 Comparison of TLC and IR heat transfer measurements 104
7 Application of experimental approaches 115
7 1 Periodically pulsating airflow temperature experiments 116
711 Exemplary results for a pulsation frequency of 0 1 Hz 116
712 Influence of pulsation frequency on the heat transfer
coefficient 120
713 Influence of pulsation frequency on the amplitude and
the phase shift of the surface heat flux and the surface
temperature 123
7 2 Periodically pulsating airflow velocity experiment 129
721 Temporal heat transfer behavior 130
722 Extrema of the heat transfer coefficient distribution 136
723 Heat transfer augmentation 138
7 3 Operation point variation experiment 139
731 Surface temperature response 140
732 Temporal heat transfer behavior 144
7 4 Wall shear stress 146
741 Input quantities and resulting wall shear stress field 148
742 Influence of the Lagrange parameter 153
ix
Contents
743 Influence of the evaluation point in time
8 Conclusions ^
Bibliography ^
Appendix
A 1R camera in situ calibration with automatic pixel assignment 115
B Inlet velocity profiles HI
C Radiation balance of the test section 191
D Emittance of black paint and TLC coating 191
E Influence of the TLC indication on the infrared thermography 201
F Uncertainty analysis 201 |
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| spelling | Brack, Stefan Verfasser (DE-588)1212887204 aut Time-resolved transient convective and conjugate heat transfer experiments using IR thermography Stefan Brack 1. Auflage München Verlag Dr. Hut 2020 xxx, 218 Seiten Illustrationen, Diagramme txt rdacontent n rdamedia nc rdacarrier Thermodynamik Dissertation Universität Stuttgart 2020 Zusammenfassung in deutscher und englischer Sprache Infrarotthermographie (DE-588)4242353-3 gnd rswk-swf Transient Heat transfer Infrared thermography (DE-588)4113937-9 Hochschulschrift gnd-content Infrarotthermographie (DE-588)4242353-3 s DE-604 Verlag Dr. Hut (München) (DE-588)10174118-2 pbl X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=1264725f7add49299022c519021b3919&prov=M&dok_var=1&dok_ext=htm Inhaltstext X:MVB http://www.dr.hut-verlag.de/978-3-8439-4413-7.html HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=032230038&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Brack, Stefan Time-resolved transient convective and conjugate heat transfer experiments using IR thermography Infrarotthermographie (DE-588)4242353-3 gnd |
| subject_GND | (DE-588)4242353-3 (DE-588)4113937-9 |
| title | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |
| title_auth | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |
| title_exact_search | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |
| title_exact_search_txtP | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |
| title_full | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography Stefan Brack |
| title_fullStr | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography Stefan Brack |
| title_full_unstemmed | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography Stefan Brack |
| title_short | Time-resolved transient convective and conjugate heat transfer experiments using IR thermography |
| title_sort | time resolved transient convective and conjugate heat transfer experiments using ir thermography |
| topic | Infrarotthermographie (DE-588)4242353-3 gnd |
| topic_facet | Infrarotthermographie Hochschulschrift |
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