Hydraulic investigations of a Y-bifurcator:
Gespeichert in:
1. Verfasser: | |
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Format: | Abschlussarbeit Buch |
Sprache: | English |
Veröffentlicht: |
Graz
Verl. der Techn. Univ.
2012
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Schriftenreihe: | Schriftenreihe zur Wasserwirtschaft
68 |
Schlagworte: | |
Online-Zugang: | Inhaltsverzeichnis |
Beschreibung: | XX, 150, XLII S. Ill., graph. Darst. |
ISBN: | 9783851252323 |
Internformat
MARC
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100 | 1 | |a Dobler, Wolfgang |e Verfasser |4 aut | |
245 | 1 | 0 | |a Hydraulic investigations of a Y-bifurcator |c Wolfgang Dobler |
264 | 1 | |a Graz |b Verl. der Techn. Univ. |c 2012 | |
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Datensatz im Suchindex
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adam_text | Titel: Hydraulic investigations of a Y-bifurcator
Autor: Dobler, Wolfgang
Jahr: 2012
Contents
Abstract iii
Kurzfassung v
Acknowledgements vii
Statutory declaration ix
Nomenclature xv
1 Introduction and objectives 1
2 Literature Review 5
2.1 Hydraulic model test of T-bifurcators.................... 6
2.1.1 Munich experiments: T-bifurcator or 90°-bifurcator........ 6
2.1.2 Munich experiments: 45°-bifurcator................ 10
2.1.3 Munich experiments: 60°-bifurcator................ 15
2.1.4 Discussion of the Munich experiments............... 18
2.2 Hydraulic model test of Y-bifurcators ................... 20
2.2.1 Causey Dam at the Ogden River.................. 20
2.2.2 Pumped storage plant Erzhausen.................. 22
2.2.3 Loss coefficient for a branch angle of 60° and 45° ........ 24
2.2.4 Pumped storage plant Muju .................... 26
2.2.5 Sulzer................................ 28
2.2.6 Alberschwende........................... 30
2.3 Summary of the Results for Y-bifurcators................. 33
2.4 Numerical investigations of bifurcators................... 36
3 Y-Bifurcator Pirns - Hydraulic Model Set-Up 37
3.1 Scaling law................................. 37
3.2 Model set up ................................ 38
3.2.1 Load Cases............................. 41
3.3 Instrumentation and measuring devices................... 44
3.3.1 Control section........................... 44
3.3.2 Sampling rate............................ 47
3.3.3 Pressure probe........................... 48
3.3.4 Flow meter............................. 48
3.3.5 Calibration of pressure probe.................... 50
4 Particle Image Velocimetry 51
4.1 Measuring Principle............................. 51
4.2 PIV set-up.................................. 52
4.3 Image cross correlation principle with Matlab and Dantec......... 56
4.4 Natural seeding............................... 59
4.5 Velocity lag of the natural seeding..................... 63
4.6 Minimum detectable velocity........................ 65
4.7 Confidence Interval............................. 68
4.7.1 Result of the confidence intervals................. 70
4.8 Evaluation of the statistics......................... 74
4.8.1 Turbulence Intensity........................ 75
4.8.2 Kinetic energy of the mean flow.................. 75
4.8.3 Turbulent kinetic energy of the flow................ 75
4.8.4 Production of k........................... 76
4.8.5 Turbulent shear stress........................ 76
5 Hydraulic losses - Loss coefficient Ç 77
5.1 Hydraulic equations............................. 78
5.1.1 Friction loss............................. 78
5.1.2 Friction coefficient A........................ 79
5.1.3 Definition of the local loss coefficient C.............. 80
5.1.4 Energy budget between two control sections for ID consideration 82
5.2 Determination of the pipe roughness.................... 85
5.2.1 Roughness - Pressure differential measurement.......... 85
5.2.2 Roughness - Particle Image Velocimetry.............. 86
5.3 Determination of the velocity correction factor « ............. 89
5.4 Extrapolation metiiod for the loss coefficient Ç .............. 96
5.5 Swirling flow................................ 102
5.5.1 Resulting loss coefficient of the swirling flow........... 103
6 Computational Fluid Dynamics 105
6.1 Computational Fluid Dynamics with Fluent (Ansys)............ 105
6.1.1 Transport equations......................... 105
6.1.2 Reynolds-averaged Navier-Stokes equation (RANS) ....... 109
6.1.3 The SIMPLE Scheme ....................... HI
6.1.4 Geometry and Mesh of the domain................. 112
6.1.5 Boundary conditions........................ 114
6.1.6 Fluent - Solver........................... 114
6.2 Computational Fluid Dynamics with OpenFoam.............. 115
6.2.1 Folder 0: Boundary conditions................... 116
7 Comparison of CFD and PIV 119
7.1 Velocity................................... 120
7.2 Total head.................................. 125
7.3 Kinetic Energy ............................... 125
7.3.1 Kinetic energy of the mean flow.................. 125
7.3.2 Kinetic energy of the turbulent flow................ 126
7.4 Reynolds stress............................... 127
7.4.1 Normal stress............................ 28
7.4.2 Shear stress............................. l29
7.5 Production.................................. 129
7.6 Comparison of Fluent with OpenFoam................... 130
8 Water Hammer calculation of Pirns hydro power plant 133
8.1 Theoretical background for water hammer................. I36
8.1.1 Time step.............................. 136
8.1.2 Boundary Conditions........................ 136
8.2 Calculation procedure and results...................... 140
8.2.1 Input data.............................. 140
8.2.2 Results for the water hammer of the bifurcation.......... 143
9 Summary and Outlook 147
9.1 Summary.................................. 147
9.2 Outlook................................... 149
Bibliography i
List of Figures v
List of Tables xiii
Appendix xv
10.1 Input File - OpenFoam........................... xv
10.1.1 File structure............................ xv
10.1.2 FolderO............................... xv
10.2 Derivation of the water hammer equations................. xxi
10.2.1 Water hammer based on the theory of the elastic water column . . xxi
10.2.2 Solution of the differential equation with the method of charac-
teristics ............................... xxiii
10.3 Published Papers.............................. xxviii
10.4 Curriculum Vitae.............................. xlii
|
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genre_facet | Hochschulschrift |
id | DE-604.BV040504424 |
illustrated | Illustrated |
indexdate | 2024-07-10T00:25:16Z |
institution | BVB |
isbn | 9783851252323 |
language | English |
oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-025351095 |
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physical | XX, 150, XLII S. Ill., graph. Darst. |
publishDate | 2012 |
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series | Schriftenreihe zur Wasserwirtschaft |
series2 | Schriftenreihe zur Wasserwirtschaft |
spelling | Dobler, Wolfgang Verfasser aut Hydraulic investigations of a Y-bifurcator Wolfgang Dobler Graz Verl. der Techn. Univ. 2012 XX, 150, XLII S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Schriftenreihe zur Wasserwirtschaft 68 Graz, Techn. Univ., Diss., 2012 Zsfassung in engl. und dt. Sprache Wasserkraftanlage (DE-588)4189216-1 gnd rswk-swf Hydraulik (DE-588)4026288-1 gnd rswk-swf Hochdrucktechnik (DE-588)4160120-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Wasserkraftanlage (DE-588)4189216-1 s Hochdrucktechnik (DE-588)4160120-8 s Hydraulik (DE-588)4026288-1 s DE-604 Schriftenreihe zur Wasserwirtschaft 68 (DE-604)BV006635574 68 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025351095&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
spellingShingle | Dobler, Wolfgang Hydraulic investigations of a Y-bifurcator Schriftenreihe zur Wasserwirtschaft Wasserkraftanlage (DE-588)4189216-1 gnd Hydraulik (DE-588)4026288-1 gnd Hochdrucktechnik (DE-588)4160120-8 gnd |
subject_GND | (DE-588)4189216-1 (DE-588)4026288-1 (DE-588)4160120-8 (DE-588)4113937-9 |
title | Hydraulic investigations of a Y-bifurcator |
title_auth | Hydraulic investigations of a Y-bifurcator |
title_exact_search | Hydraulic investigations of a Y-bifurcator |
title_full | Hydraulic investigations of a Y-bifurcator Wolfgang Dobler |
title_fullStr | Hydraulic investigations of a Y-bifurcator Wolfgang Dobler |
title_full_unstemmed | Hydraulic investigations of a Y-bifurcator Wolfgang Dobler |
title_short | Hydraulic investigations of a Y-bifurcator |
title_sort | hydraulic investigations of a y bifurcator |
topic | Wasserkraftanlage (DE-588)4189216-1 gnd Hydraulik (DE-588)4026288-1 gnd Hochdrucktechnik (DE-588)4160120-8 gnd |
topic_facet | Wasserkraftanlage Hydraulik Hochdrucktechnik Hochschulschrift |
url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025351095&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
volume_link | (DE-604)BV006635574 |
work_keys_str_mv | AT doblerwolfgang hydraulicinvestigationsofaybifurcator |