Hybrid turbulence simulation to predict cyclic variations in internal combustion engines:
Gespeichert in:
| Beteilige Person: | |
|---|---|
| Format: | Hochschulschrift/Dissertation Buch |
| Sprache: | Englisch |
| Veröffentlicht: |
Göttingen
Cuvillier
2007
|
| Ausgabe: | 1. Aufl. |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016478218&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Umfang: | XVI, 152 S. graph. Darst. |
| ISBN: | 9783867272803 |
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| 245 | 1 | 0 | |a Hybrid turbulence simulation to predict cyclic variations in internal combustion engines |c vorgelegt von Volker Michael Sohm |
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Datensatz im Suchindex
| DE-BY-TUM_call_number | 0001 2008 A 3405 |
|---|---|
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| DE-BY-TUM_location | Mag |
| DE-BY-TUM_media_number | 040006772809 |
| _version_ | 1821933151118688256 |
| adam_text | HYBRID TURBULENCE SIMULATION TO PREDICT CYCLIC VARIATIONS IN INTERNAL
COMBUSTION ENGINES VON DER FAKULTAT FIIR MASCHINENWESEN DER
RHEINISCH-WESTFALISCHEN TECHNISCHEN HOCHSCHULE AACHEN ZUR ERLANGUNG DES
AKADEMISCHEN GRADES EINES DOKTORS DER INGENIEURWISSENSCHAFTEN GENEHMIGTE
DISSERTATION VORGELGT VON VOLKER MICHAEL SOHM, M. SC. AUS STUTTGART
BERICHTER: UNIV.-PROF. DR.-ING. DR. H.C. N. PETERS UNIV.-PROF. DR.-ING.
W. SCHRODER TAG DER MIINDLICHEN PRIIFUNG: 14. MAI 2007 CONTENTS LIST
OF FIGURES V LIST OF TABLES X NOMENCLATURE XI 1 INTRODUCTION 1 2 THEORY
3 2.1 PHENOMENOLOGICAL DESCRIPTION OF TURBULENCE 3 2.1.1 THE ENERGY
SPECTRUM 3 2.1.2 STATISTICAL DESCRIPTION OF TURBULENCE 6 2.1.3
ANISOTROPY-INVARIANT THEORY 10 2.2 GOVERNING EQUATIONS 12 2.2.1
GOVERNING TRANSPORT EQUATIONS 12 2.2.2 FILTERED GOVERNING TRANSPORT
EQUATIONS 14 2.3 TURBULENCE MODELING 17 2.3.1 REYNOLDS-AVERAGED
NAVIER-STOKES SIMULATION 18 2.3.1.1 SPALART-ALLMARAS MODEL 22 2.3.1.2
SST.MODEL 23 2.3.2 LARGE EDDY SIMULATION 25 2.3.2.1 SMAGORINSKY MODEL 28
2.3.2.2 DEARDORFF MODEL 29 2.3.3 HYBRID RANS/LES APPROACH AND DETACHED
EDDY SIMULATION 30 2.3.3.1 SPALLART-ALLMARAS DES MODEL 34 2.3.3.2 SST
DES MODEL 34 2.4 BOUNDARY AND INITIAL CONDITIONS . ...- 37 2.4.1
BOUNDARY CONDITIONS 37 2.4.1.1 WALL BOUNDARY CONDITION , -. 37 2.4.1.2
INFLOW CONDITION 39 2.4.1.3 OUTFLOW CONDITION 42 2.4.1.4 PERIODIC
BOUNDARIES 43 CONTENTS 2.4.1.5 SYMMETRY BOUNDARIES 43 2.4.2 INITIAL
CONDITIONS 44 3 NUMERICAL ISSUES OF HYBRID RANS/LES MODELS IN COMPLEX
GEOMETRIES 45 3.1 SPATIAL SCHEME 45 3.1.1 ORDER OF CONVERGENCE 45 3.1.2
NUMERICAL DISSIPATION 47 3.1.3 HYBRID SPATIAL SCHEME 51 3.2 TEMPORAL
SCHEME AND TIME STEP SIZE 53 3.3 MESHING-STRATEGY 55 3.4 MESH-MOVEMENT
56 3.4.1 NODE-MOVEMENT 57 3.4.2 INTERPOLATION 60 4 TEST CASES 63 4.1
DECAYING HOMOGENEOUS ISOTROPIC TURBULENCE 63 4.1.1 NUMERICAL SETUP 64
4.1.2 RESULTS 66 4.1.2.1 NUMERICAL AND PHYSICAL DISSIPATION 66 4.1.2.2
IMPACT OF GRID RESOLUTION 67 4.1.2.3 TURBULENT QUANTITIES 68 4.1.3
SUMMARY 70 4.2 FLOW OVER A BACKWARD-FACING STEP AT LOW REYNOLDS NUMBER
72 4.2.1 NUMERICAL SETUP 72 4.2.2 RESULTS 73 4.2.2.1 EXTENT OF THE RANS
AND THE LES REGION 74 4.2.2.2 COMPARISON OF TIME-AVERAGED FLOW
QUANTITIES 75 4.2.3 SUMMARY *. 76 4.3 VORTEX SHEDDING PAST A TRIANGULAR
OBSTACLE AT HIGH REYNOLDS NUMBER 78 4.3.1 NUMERICAL SETUP . -7 8 4.3.2
RESULTS 81 4.3.2.1 STEADY AND TRANSIENT INLET CONDITIONS 82 4.3.2.2
STATISTICAL TURBULENT FLOW QUANTITIES OF URANS, LES, DES . 84 CONTENTS
III 4.3.2.3 DIFFERENCES BETWEEN THE FLOW CHARACTERISTICS OF URANS AND
DES 85 4.3.2.4 INVESTIGATION INTO THE ANISOTROPY OF TURBULENCE 90 4.3.3
SUMMARY 93 4.4 CYCLIC VARIATIONS IN A SIMPLIFIED ENGINE SETUP 94 4.4.1
NUMERICAL SETUP 94 4.4.2 RESULTS 97 4.4.2.1 FLOW CHARACTERISTICS 97
4.4.2.2 CYCLIC VARIATION OF THE TUMBLING MOTION 97 4.4.3 SUMMARY 105 5
APPLICATION OF HYBRID RANS/LES TO FLOWS IN IC-ENGINES 106 5.1 FLOW
CHARACTERISTICS IN IC-ENGINES 106 5.1.1 DRIVING QUANTITIES IN TURBULENT
FLOWS IN IC-ENGINES 106 5.1.1.1 TURBULENT SCALES AND REYNOLDS NUMBERS
106 5.1.1.2 LARGE SCALE MOTION AND PRODUCTION OF TURBULENCE 108 5.1.1.3
DISCHARGE COEFFICIENT 112 5.1.2 CYCLE-TO-CYCLE VARIATIONS 115 5.2 STEADY
FLOW INVESTIGATION OF AN INTAKE PORT 119 5.2.1 EXPERIMENTAL SETUP 119
5.2.2 NUMERICAL SETUP 120 5.2.3 RESULTS . . . . } 121 5.2.3.1 EXTENT OF
THE RANS AND THE LES REGION : . . 122 5.2.3.2 DISCHARGE COEFFICIENT AND
STATISTICAL CONVERGENCE 122 5.2.3.3 AVERAGED AND INSTANTANEOUS VELOCITY
FIELDS 123 5.2.4 SUMMARY 128 5.3 MULTI-CYCLE SIMULATION OF AN IC-ENGINE
130 5.3.1 EXPERIMENTAL SETUP 130 5.3.2 NUMERICAL SETUP .-: 132 5.3.3
RESULTS 134 5.3.3.1 EXTENT OF THE RANS AND THE LES REGION .- 136 5.3.3.2
FLOW CHARACTERISTICS 137 5.3.3.3 CYCLIC VARIATIONS 137 5.3.4 SUMMARY 139
IV CONTENTS 6 SUMMARY AND CONCLUSIONS 144 BIBLIOGRAPHY 147
|
| any_adam_object | 1 |
| author | Sohm, Volker Michael 1977- |
| author_GND | (DE-588)133324087 |
| author_facet | Sohm, Volker Michael 1977- |
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| bvnumber | BV023293644 |
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| dewey-full | 621.43401532517 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.43401532517 |
| dewey-search | 621.43401532517 |
| dewey-sort | 3621.43401532517 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Maschinenbau / Maschinenwesen |
| edition | 1. Aufl. |
| format | Thesis Book |
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| illustrated | Illustrated |
| indexdate | 2024-12-20T13:12:47Z |
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| isbn | 9783867272803 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-016478218 |
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| physical | XVI, 152 S. graph. Darst. |
| publishDate | 2007 |
| publishDateSearch | 2007 |
| publishDateSort | 2007 |
| publisher | Cuvillier |
| record_format | marc |
| spellingShingle | Sohm, Volker Michael 1977- Hybrid turbulence simulation to predict cyclic variations in internal combustion engines Instationäre Strömung (DE-588)4132734-2 gnd Reynoldssche Gleichung (DE-588)4261715-7 gnd Turbulenztheorie (DE-588)4186472-4 gnd LES Strömung (DE-588)4315616-2 gnd Ottomotor (DE-588)4044196-9 gnd |
| subject_GND | (DE-588)4132734-2 (DE-588)4261715-7 (DE-588)4186472-4 (DE-588)4315616-2 (DE-588)4044196-9 (DE-588)4113937-9 |
| title | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines |
| title_auth | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines |
| title_exact_search | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines |
| title_full | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines vorgelegt von Volker Michael Sohm |
| title_fullStr | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines vorgelegt von Volker Michael Sohm |
| title_full_unstemmed | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines vorgelegt von Volker Michael Sohm |
| title_short | Hybrid turbulence simulation to predict cyclic variations in internal combustion engines |
| title_sort | hybrid turbulence simulation to predict cyclic variations in internal combustion engines |
| topic | Instationäre Strömung (DE-588)4132734-2 gnd Reynoldssche Gleichung (DE-588)4261715-7 gnd Turbulenztheorie (DE-588)4186472-4 gnd LES Strömung (DE-588)4315616-2 gnd Ottomotor (DE-588)4044196-9 gnd |
| topic_facet | Instationäre Strömung Reynoldssche Gleichung Turbulenztheorie LES Strömung Ottomotor Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016478218&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT sohmvolkermichael hybridturbulencesimulationtopredictcyclicvariationsininternalcombustionengines |
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