Experimental investigation of the flow over macroscopic hexagonal structured surfaces:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2014
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| Schlagworte: | |
| Online-Zugang: | Volltext Volltext Inhaltsverzeichnis |
| Beschreibung: | 101 S. Ill., graph. Darst. |
Internformat
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Datensatz im Suchindex
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|---|---|
| adam_text | TABLE OF CONTENTS
1 INTRODUCTION 7
1.1 MOTIVATION 7
1.2 AIMS AND APPROACHES 11
2 THEORETICAL BACKGROUND : 12
2.1 PRESSURE DRAG 13
2.2 SKIN DRAG 15
2.3 FUNDAMENTALS OF BOUNDARY LAYER 17
3 STATE OF THE ART 18
3.1 DRAG REDUCTION OF BLUFF BODIES 18
3.2 DRAG REDUCTION OF STREAMLINED BODIES 20
4 EXPERIMENTAL SETUP 24
4.1 BLUFF BODY INVESTIGATION 25
4.2 STREAMLINED BODY INVESTIGATION 27
4.3 INVESTIGATIONS ON EXPERIMENTAL WIND TURBINE 28
4.4 INVESTED CONFIGURATIONS 30
5 MEASUREMENT TECHNIQUES 34
5.1 DRAG MEASUREMENT 34
5.2 FLOW VISUALIZATION 34
5.2.1 SMOKE FLOW VISUALIZATION 34
5.2.2 SURFACE OIL FLOW VISUALIZATION 35
5.2.3 OIL FILM INTERFEROMETRIC VISUALIZATION 35
5.3 VELOCITY MEASUREMENTS 35
5.4 SHEAR STRESS MEASUREMENTS 37
5.4.1 CLAUSER CHART METHOD : 37
5.4.2 OIL FILM INTERFEROMETRIC METHOD 39
5.5 PRESSURE & TEMPERATURE MEASUREMENTS 42
5.6 BRAKING MOMENT AND ANGULAR SPEED MEASUREMENT 43
6 RESULTS AND
DISCUSSION 44
6.1 STRUCTURED CYLINDERS 44
1
HTTP://D-NB.INFO/1056898836
6.1.1 DRAG VARIATION 44
6.1.2 VELOCITY PROFILES IN THE WAKE REGION 45
6.1.3 LOCATION OF FLOW SEPARATION 46
6.1.4 FLOW VISUALIZATION ON THE SURFACES OF CYLINDERS 48
6.1.5 STREAMWISE VELOCITY MEASUREMENTS 50
6.1.6 ENERGY SPECTRA OF THE FLOW OVER CYLINDERS 55
6.1.7 VORTEX SHEDDING 56
6.2 STRUCTURED PLATES 59
6.2.1 NON DIMENSIONAL VELOCITY PROFILES 59
6.2.2 BOUNDARY LAYER QUANTITIES 64
6.2.3 FLOW OVER INDIVIDUAL HEXAGONAL STRUCTURE 67
6.2.3.1 OPTIMIZATION OF THE MEASUREMENT TECHNIQUES 67
6.2.3.2 SHEAR STRESS MEASUREMENTS 69
6.2.3.3 BOUNDARY LAYER MEASUREMENTS 70
6.2.3.4 FLOW STRUCTURES WITHIN THE HEXAGONAL DEPRESSIONS AND BUMPS 72
6.2.3.5 POWER SPECTRUM 77
6.2.3.6 VISUALIZATION OF FLOW OVER THE SURFACE 79
6.2.3.7 PRESSURE DISTRIBUTION 82
6.3 EXPERIMENTAL WIND TURBINE 84
7 CONCLUSIONS & FUTURE WORK 93
7.1 CONCLUSIONS 93
7.2 FUTURE WORK 94
8 LITERATURE 967
2
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| author | Butt, Usman 1985- |
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| dewey-sort | 3620.10740287 |
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| spelling | Butt, Usman 1985- Verfasser (DE-588)1054149011 aut Experimental investigation of the flow over macroscopic hexagonal structured surfaces vorgelegt von Usman Butt 2014 101 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Cottbus-Senftenberg, Techn. Univ., Diss., 2014 Turbulente Grenzschicht (DE-588)4137846-5 gnd rswk-swf Strömungsfeld (DE-588)4058078-7 gnd rswk-swf Hitzdrahtanemometer (DE-588)4129820-2 gnd rswk-swf Strömungsmesstechnik (DE-588)4129610-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Hitzdrahtanemometer (DE-588)4129820-2 s Strömungsfeld (DE-588)4058078-7 s Strömungsmesstechnik (DE-588)4129610-2 s Turbulente Grenzschicht (DE-588)4137846-5 s DE-604 Erscheint auch als Online-Ausgabe urn:nbn:de:kobv:co1-opus4-30555 http://opus4.kobv.de/opus4-btu/frontdoor/index/index/docId/3055 Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:kobv:co1-opus4-30555 Resolving-System kostenfrei Volltext DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027424396&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Butt, Usman 1985- Experimental investigation of the flow over macroscopic hexagonal structured surfaces Turbulente Grenzschicht (DE-588)4137846-5 gnd Strömungsfeld (DE-588)4058078-7 gnd Hitzdrahtanemometer (DE-588)4129820-2 gnd Strömungsmesstechnik (DE-588)4129610-2 gnd |
| subject_GND | (DE-588)4137846-5 (DE-588)4058078-7 (DE-588)4129820-2 (DE-588)4129610-2 (DE-588)4113937-9 |
| title | Experimental investigation of the flow over macroscopic hexagonal structured surfaces |
| title_auth | Experimental investigation of the flow over macroscopic hexagonal structured surfaces |
| title_exact_search | Experimental investigation of the flow over macroscopic hexagonal structured surfaces |
| title_full | Experimental investigation of the flow over macroscopic hexagonal structured surfaces vorgelegt von Usman Butt |
| title_fullStr | Experimental investigation of the flow over macroscopic hexagonal structured surfaces vorgelegt von Usman Butt |
| title_full_unstemmed | Experimental investigation of the flow over macroscopic hexagonal structured surfaces vorgelegt von Usman Butt |
| title_short | Experimental investigation of the flow over macroscopic hexagonal structured surfaces |
| title_sort | experimental investigation of the flow over macroscopic hexagonal structured surfaces |
| topic | Turbulente Grenzschicht (DE-588)4137846-5 gnd Strömungsfeld (DE-588)4058078-7 gnd Hitzdrahtanemometer (DE-588)4129820-2 gnd Strömungsmesstechnik (DE-588)4129610-2 gnd |
| topic_facet | Turbulente Grenzschicht Strömungsfeld Hitzdrahtanemometer Strömungsmesstechnik Hochschulschrift |
| url | http://opus4.kobv.de/opus4-btu/frontdoor/index/index/docId/3055 https://nbn-resolving.org/urn:nbn:de:kobv:co1-opus4-30555 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027424396&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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