Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2011
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| Schriftenreihe: | Berichte aus der Strömungstechnik
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XVI, 228 S. Ill., graph. Darst. 21 cm, 369 g |
| ISBN: | 9783844003505 |
Internformat
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| 245 | 1 | 0 | |a Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction |c Julian Winkler |
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Datensatz im Suchindex
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| adam_text | IMAGE 1
CONTENTS
1 INTRODUCTION 1
1.1 BACKGROUND 1
1.2 MOTIVATION 1
1.3 OBJECTIVES 4
1.4 ORGANIZATION OF THIS THESIS 5
2 THE TRAILING EDGE BLOWING CONCEPT 6
2.1 BLOWING FOR FLOW AND NOISE CONTROL 6
2.2 LITERATURE REVIEW OF TRAILING-EDGE BLOWING FOR WAKE MANAGEMENT 8
2.2.1 STUDIES ON SINGLE AIRFOILS AND FLAT PLATES 8
2.2.2 STUDIES ON AIRFOIL CASCADES 10
2.2.3 STUDIES ON ROTORS 13
2.3 CRITICAL ASSESSMENT 16
3 METHODOLOGY 18
3.1 OVERVIEW 18
3.2 EXPERIMENTS 20
3.2.1 WIND-TUNNEL FACILITY 20
3.2.2 ACOUSTIC MEASUREMENTS 21
3.2.3 STEADY AND UNSTEADY PRESSURE MEASUREMENTS 21
3.2.4 VELOCITY MEASUREMENTS 22
3.2.4.1 HOT-WIRE MEASUREMENTS 22
3.2.4.2 PARTICLE IMAGE VELOCIMETRY MEASUREMENTS 23
3.3 NUMERICAL SIMULATIONS 24
3.3.1 PRELIMINARY REMARKS 24
3.3.2 GOVERNING EQUATIONS 24
3.3.3 DIRECT NUMERICAL SIMULATION 25
3.3.4 LARGE-EDDY SIMULATION 26
3.3.5 RANS AND HYBRID RANS/LES APPROACHES 31
3.4 ACOUSTIC PREDICTIONS 34
3.4.1 PRELIMINARY REMARKS 34
3.4.2 HYBRID METHODS 34
3.4.3 LIGHTHILL S ACOUSTIC ANALOGY 35
3.4.4 AIRFOIL SELF-NOISE PREDICTION 38
3.4.4.1 FFOWCS WILLIAMS AND HALL S TRAILING EDGE NOISE THEORY 38 3.4.4.2
FINITE-ELEMENT/INFINITE-ELEMENT SIMULATION 41
3.4.4.3 AMIET S TRAILING EDGE NOISE THEORY 44
3.4.5 LEADING EDGE NOISE PREDICTION 47
3.4.6 LITERATURE REVIEW OF NUMERICAL AIRFOIL NOISE PREDICTION 50 3.4.6.1
AIRFOIL NOISE PREDICTION FROM DNS 50
3.4.6.2 AIRFOIL NOISE PREDICTION FROM LES 50
3.4.6.3 AIRFOIL NOISE PREDICTION FROM RANS AND HYBRID RANS/LES . . 55
3.4.6.4 SUMMARY 56
4 AIRFOIL NOISE WITHOUT TRAILING-EDGE BLOWING 57
4.1 NOISE MECHANISMS 57
BIBLIOGRAFISCHE INFORMATIONEN HTTP://D-NB.INFO/1014594340
DIGITALISIERT DURCH
IMAGE 2
CONTENTS
4.2 WIND-TUNNEL EXPERIMENTS 59
4.2.1 PRELIMINARY REMARKS 59
4.2.2 AIRFOIL PROFILE 60
4.2.3 LIFT MEASUREMENT AND WIND-TUNNEL CORRECTIONS 61
4.2.4 TURBULENT INFLOW CONDITIONS 62
4.2.5 MEASUREMENT SCHEME 64
4.3 SIGNAL PROCESSING OF MICROPHONE DATA 64
4.3.1 NOTATION CONVENTION 64
4.3.2 NOISE EXTRACTION TECHNIQUE 65
4.4 ACOUSTIC SPECTRA 69
4.5 ACOUSTIC POLAR 73
4.6 AIRFOIL NOISE PREDICTION FROM EXPERIMENTS 75
4.6.1 TRAILING-EDGE NOISE FROM A NACA 0012-63 75
4.6.2 LEADING-EDGE NOISE FROM A NACA 0012-63 78
4.6.2.1 TURBULENCE MEASUREMENT SETUP 78
4.6.2.2 TURBULENCE DEVELOPMENT DOWNSTREAM OF THE GRIDS 78
4.6.2.3 INFLUENCE OF THE WIND-TUNNEL NOZZLE ON TURBULENCE 81
4.6.2.4 CHARACTERIZATION OF TURBULENCE IMPINGING ON THE AIRFOIL . . ..
83 4.6.2.5 NOISE PREDICTION 85
4.7 AIRFOIL NOISE PREDICTION FROM LES 87
4.7.1 INTRODUCTION 87
4.7.2 NUMERICAL SETUP AND BOUNDARY CONDITIONS 89
4.7.3 GRID TOPOLOGY 90
4.7.4 AERODYNAMIC COMPARISON BETWEEN EXPERIMENT AND SIMULATION 91
4.7.4.1 MEAN AND FLUCTUATING PRESSURE FIELD 91
4.7.4.2 VELOCITY STATISTICS 97
4.7.5 TRAILING EDGE NOISE PREDICTION 100
4.7.5.1 PRELIMINARY REMARKS ON THE GREEN S FUNCTION 100
4.7.5.2 RESULTS USING ANALYTICAL MODELS 103
4.7.5.3 RESULTS USING CAA 104
4.8 SUMMARY 107
TRAILING-EDGE BLOWING THROUGH A SPANWISE SLOT 109
5.1 TRAILING EDGE BLOWING CONFIGURATION 109
5.2 BLOWING-MOMENTUM CONSIDERATIONS I LL
5.2.1 MOMENTUM ANALYSIS WITHOUT BLOWING I LL
5.2.2 MOMENTUM ANALYSIS WITH BLOWING 113
5.2.3 WAKE-FILLING CRITERIA 116
5.2.4 CHOICE OF BLOWING PARAMETER 121
5.3 BLOWING AIRFOIL SELF-NOISE 124
5.3.1 SELF-NOISE CHARACTERISTICS 124
5.3.2 ACOUSTIC SOURCE TERM ANALYSIS FROM EXPERIMENTS 127
5.3.3 RESULTS FROM LARGE-EDDY SIMULATION 130
5.3.3.1 NUMERICAL SETUP AND BOUNDARY CONDITIONS 130
5.3.3.2 GRID TOPOLOGY 130
5.3.3.3 FLUCTUATING PRESSURE FIELD 131
5.3.3.4 VELOCITY FIELD NEAR THE TRAILING EDGE 133
5.3.4 ACOUSTIC PREDICTIONS 134
5.3.4.1 RESULTS USING ANALYTICAL MODELS 134
IMAGE 3
CONTENTS
5.3.4.2 RESULTS USING CAA 136
5.3.4.3 CONCLUDING REMARKS 138
5.4 WAKE-AIRFOIL INTERACTION NOISE 139
5.4.1 PRELIMINARY REMARKS 139
5.4.2 WAKE-AIRFOIL INTERACTION NOISE CHARACTERISTICS 139
5.4.3 ACOUSTIC SOURCE TERM ANALYSIS FROM EXPERIMENTS 141
5.4.3.1 TURBULENT WAKE FLOW FIELD 141
5.4.3.2 UNSTEADY PRESSURE RESPONSE 145
5.4.4 RESULTS FROM LARGE-EDDY SIMULATION 149
5.4.5 ACOUSTIC PREDICTIONS 151
5.5 SYNTHESIS AND CONCLUSIONS 152
6 TRAILING-EDGE BLOWING THROUGH DIFFERENT EDGE DESIGNS 157
6.1 BLOWING GEOMETRIES 157
6.2 SCALING APPROACH 159
6.3 BLOWING AIRFOIL SELF-NOISE 162
6.3.1 SELF-NOISE CHARACTERISTICS 162
6.3.1.1 EFFECT OF DISCRETIZING THE SPANWISE SLOT 162
6.3.1.2 EFFECT OF SERRATIONS 163
6.3.1.3 EFFECT OF POROUS EDGES 164
6.3.2 ACOUSTIC SOURCE TERM ANALYSIS FROM LARGE-EDDY SIMULATION 165
6.3.2.1 SIMULATION CASES 165
6.3.2.2 BLOWING THROUGH DISCRETE CHANNELS 166
6.3.2.3 BLOWING WITH ADDED SERRATIONS 169
6.4 WAKE-AIRFOIL INTERACTION NOISE 173
6.4.1 WAKE-AIRFOIL INTERACTION NOISE CHARACTERISTICS 173
6.4.1.1 EFFECT OF DISCRETIZING THE SPANWISE SLOT 173
6.4.1.2 EFFECT OF SERRATIONS 174
6.4.2 ACOUSTIC SOURCE TERM ANALYSIS FROM EXPERIMENTS 175
6.4.2.1 SEGMENTED SLOTS 175
6.4.2.2 SERRATIONS 176
6.5 SYNTHESIS AND CONCLUSIONS 177
7 SUMMARY AND CONCLUSIONS 181
APPENDICES 185
A REMOTE SENSOR CALIBRATION 185
B RADIATION INTEGRALS IN AMIET S EDGE-NOISE MODELS 188
B.I TRAILING-EDGE NOISE 188
B.2 LEADING-EDGE NOISE 190
C UNCERTAINTY AND ERROR ESTIMATES 191
C.I MEASUREMENT UNCERTAINTIES 191
C.2 UNCERTAINTIES IN ESTIMATES 193
C.3 EXPERIMENTS 194
C.3.1 ACOUSTIC MEASUREMENTS 194
C.3.2 HOT-WIRE MEASUREMENTS 194
IMAGE 4
CONTENTS
C.3.3 STEADY PRESSURE MEASUREMENTS 195
C.3.4 UNSTEADY PRESSURE MEASUREMENTS 195
C.3.5 BLOWING MASS-FLOW MEASUREMENTS 197
C.4 SIMULATIONS 197
C.4.1 INFLUENCE OF GRID RESOLUTION 198
C.4.2 VALIDATION 203
C.4.3 UNCERTAINTIES DUE TO DATA SAMPLING 204
REFERENCES 205
|
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| author | Winkler, Julian 1979- |
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| author_facet | Winkler, Julian 1979- |
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| bvnumber | BV039706083 |
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| dewey-full | 621.40601534 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
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| dewey-raw | 621.40601534 |
| dewey-search | 621.40601534 |
| dewey-sort | 3621.40601534 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Maschinenbau / Maschinenwesen |
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| indexdate | 2024-07-10T00:09:25Z |
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| isbn | 9783844003505 |
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| spelling | Winkler, Julian 1979- Verfasser (DE-588)1015144837 aut Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction Julian Winkler Aachen Shaker 2011 XVI, 228 S. Ill., graph. Darst. 21 cm, 369 g txt rdacontent n rdamedia nc rdacarrier Berichte aus der Strömungstechnik Zugl.: Siegen, Univ., Diss., 2011 Strömungsakustik (DE-588)4116645-0 gnd rswk-swf Sekundärströmung (DE-588)4180802-2 gnd rswk-swf Schalldämmung (DE-588)4052023-7 gnd rswk-swf Nachlaufdelle (DE-588)4507543-8 gnd rswk-swf Fluid-Struktur-Wechselwirkung (DE-588)4314754-9 gnd rswk-swf Strömungsmaschine (DE-588)4058079-9 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Strömungsmaschine (DE-588)4058079-9 s Nachlaufdelle (DE-588)4507543-8 s Fluid-Struktur-Wechselwirkung (DE-588)4314754-9 s Strömungsakustik (DE-588)4116645-0 s Schalldämmung (DE-588)4052023-7 s Sekundärströmung (DE-588)4180802-2 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024554500&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Winkler, Julian 1979- Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction Strömungsakustik (DE-588)4116645-0 gnd Sekundärströmung (DE-588)4180802-2 gnd Schalldämmung (DE-588)4052023-7 gnd Nachlaufdelle (DE-588)4507543-8 gnd Fluid-Struktur-Wechselwirkung (DE-588)4314754-9 gnd Strömungsmaschine (DE-588)4058079-9 gnd |
| subject_GND | (DE-588)4116645-0 (DE-588)4180802-2 (DE-588)4052023-7 (DE-588)4507543-8 (DE-588)4314754-9 (DE-588)4058079-9 (DE-588)4113937-9 |
| title | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction |
| title_auth | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction |
| title_exact_search | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction |
| title_full | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction Julian Winkler |
| title_fullStr | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction Julian Winkler |
| title_full_unstemmed | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction Julian Winkler |
| title_short | Investigation of trailing-edge blowing on airfoils for turbomachinery broadband noise reduction |
| title_sort | investigation of trailing edge blowing on airfoils for turbomachinery broadband noise reduction |
| topic | Strömungsakustik (DE-588)4116645-0 gnd Sekundärströmung (DE-588)4180802-2 gnd Schalldämmung (DE-588)4052023-7 gnd Nachlaufdelle (DE-588)4507543-8 gnd Fluid-Struktur-Wechselwirkung (DE-588)4314754-9 gnd Strömungsmaschine (DE-588)4058079-9 gnd |
| topic_facet | Strömungsakustik Sekundärströmung Schalldämmung Nachlaufdelle Fluid-Struktur-Wechselwirkung Strömungsmaschine Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024554500&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT winklerjulian investigationoftrailingedgeblowingonairfoilsforturbomachinerybroadbandnoisereduction |