Quantitative analysis of vehicle aerodynamics during crosswind gusts:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
München
Verl. Dr. Hut
2012
|
| Edition: | 1. Aufl. |
| Subjects: | |
| Online Access: | Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120719-1095887-1-3 Inhaltsverzeichnis |
| Physical Description: | XII, 130 S. graph. Darst. |
| ISBN: | 9783843906586 |
Staff View
MARC
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| 100 | 1 | |a Wojciak, Johannes |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Quantitative analysis of vehicle aerodynamics during crosswind gusts |c Johannes D. Wojciak |
| 250 | |a 1. Aufl. | ||
| 264 | 1 | |a München |b Verl. Dr. Hut |c 2012 | |
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Record in the Search Index
| _version_ | 1804150015217631232 |
|---|---|
| adam_text | IMAGE 1
CONTENTS
NOMENCLATURE IX
1 MOTIVATION AND OBJECTIVES 1
1.1 INTRODUCTION 1
1.2 DEFINITIONS 2
1.2.1 COORDINATE SYSTEM 2
1.2.2 DIINENSIONLESS FLOW PARAMETERS 2
1.2.3 QUASI-STEADY APPROXIMATION 4
1.3 BACKGROUND 4
1.3.1 ANALYSIS OF THE ONCOMING FLOW FIELD 4
1.3.2 EXPERIMENTAL MODELING 9
1.3.3 NUMERICAL MODELING 13
1.3.4 EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF THEISSEN 15
1.4 OBJECTIVES 21
1.5 THEORY 22
1.5.1 LATTICE BOLTZMANU METHOD AND IMPLEMENTATION IN POWERFLOW . 22
1.5.2 REYNOLDS- AVER AGED NAVIER-STOKES METHOD AND IMPLEMENTATION IN
OPENFOAM 25
2 EXPERIMENTAL INVESTIGATION O F ON-ROAD FLOW CONDITIONS DURING
CROSSWIND GUSTS 3 1
2.1 EXPERIMENTAL SETUP 31
2.1.1 PROBE POSITION AND PROBE MOTION 32
2.1.2 FLUID PROBE 32
2.1.3 SIGNAL PROCESSING UNIT 34
2.1.4 MEASUREMENT PROCEDURE 35
2.2 DATA PROCESSING 35
2.2.1 TURBULENCE INTENSITY 36
2.2.2 TURBULENCE LENGTH SCALE 36
2.3 RESULTS AND DISCUSSION 37
2.3.1 EXEMPLARY GUST EVENT 37
2.3.2 GUST PROFILE 38
2.3.3 GUST AMPLITUDE 39
2.3.4 TURBULENCE INTENSITY 40
2.3.5 GUST FREQUENCY 41
2.3.6 SPECTRAL ENERGY DISTRIBUTION 42
2.3.7 BOUNDARY LAYER PROFILE 42
2.4 CONCLUSIONS 43
VII
HTTP://D-NB.INFO/102715753X
IMAGE 2
CONTENTS
3 EXPERIMENTAL INVESTIGATION O F UNSTEADY AERODYNAMICS UNDER
TIME-DEPENDENT FLOW CONDITIONS 4 7
3.1 EXPERIMENTAL SETUP 47
3.1.1 MODEL 47
3.1.2 TEST FACILITY 48
3.1.3 MODEL MOTION 49
3.1.4 LOAD MEASUREMENTS 49
3.1.5 SURFACE PRESSURE MEASUREMENTS 49
3.1.6 DATA PROCESSING 51
3.2 RESULTS AND DISCUSSION 51
3.2.1 ANALYSIS OF UNSTEADY MECHANISM BY SURFACE PRESSURE MEASUREMENTS 52
3.2.2 QUANTITATIVE ANALYSIS OF SURFACE PRESSURE DISTRIBUTION A T THE
REAR SIDE 5G 3.2.3 DEPENDENCY OF UNSTEADY PHENOMENA ON GUST
CHARACTERISTICS C O 3.2.4 DEPENDENCY OF UNSTEADY PHENOMENA ON REAR
GEOMETRY 65
3.3 SUMMARY AND CONCLUSIONS 69
4 VALIDATION O F A NUMERICAL SETUP FOR AERODYNAMIC SIMULATIONS UNDER
TIMEDEPENDENT FLOW CONDITIONS 7 3
4.1 NUMERICAL SETUP 73
4.1.1 MODEL AND SCALE 73
4.1.2 DOMAIN AND BOUNDARY CONDITIONS 74
4.1.3 MODEL MOTION 75
4.1.4 NUMERICAL GRID 75
4.1.5 DATA PROCESSING 77
4.1.6 SIMULATION PERFORMANCE 77
4.2 GRID STUDY 77
4.2.1 VARIATION OF GRID RESOLUTION A T VEHICLE SURFACE 77
4.2.2 VARIATION OF REFINEMENT ZONES 79
4.3 RESULTS 82
4.3.1 CONSTANT YAW ANGLE 82
4.3.2 TRANSIENT CHANGE OF YAW ANGLE 88
4.3.3 INFLUENCE OF GEOMETRIC CHANGES 96
4.4 SUMMARY AND DISCUSSION 105
4.5 COMPARISON WITH RESULTS FROM ANOTHER NUMERICAL APPROACH 106
4.5.1 NUMERICAL SETUP 106
4.5.2 RESULTS 107
4.5.3 DISCUSSION 109
4.6 CONCLUSIONS 110
5 SUMMARY AND OUTLOOK 111
LIST O F FIGURES 115
LIST O F TABLES 119
REFERENCES 121
|
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| author_role | aut |
| author_sort | Wojciak, Johannes |
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| bvnumber | BV040709134 |
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| ctrlnum | (OCoLC)826628077 (DE-599)BVBBV040709134 |
| discipline | Verkehrstechnik |
| edition | 1. Aufl. |
| format | Thesis Book |
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| spelling | Wojciak, Johannes Verfasser aut Quantitative analysis of vehicle aerodynamics during crosswind gusts Johannes D. Wojciak 1. Aufl. München Verl. Dr. Hut 2012 XII, 130 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Techn. Univ., Diss., 2012 Instationäre Strömung (DE-588)4132734-2 gnd rswk-swf Numerische Strömungssimulation (DE-588)4690080-9 gnd rswk-swf Seitenwind (DE-588)4466542-8 gnd rswk-swf Personenkraftwagen (DE-588)4076001-7 gnd rswk-swf Aerodynamik (DE-588)4000589-6 gnd rswk-swf Bö (DE-588)4202927-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Personenkraftwagen (DE-588)4076001-7 s Aerodynamik (DE-588)4000589-6 s Seitenwind (DE-588)4466542-8 s Bö (DE-588)4202927-2 s Instationäre Strömung (DE-588)4132734-2 s Numerische Strömungssimulation (DE-588)4690080-9 s DE-604 Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:91-diss-20120719-1095887-1-3 http://mediatum.ub.tum.de/node?id=1095887 Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120719-1095887-1-3 Resolving-System DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025689500&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Wojciak, Johannes Quantitative analysis of vehicle aerodynamics during crosswind gusts Instationäre Strömung (DE-588)4132734-2 gnd Numerische Strömungssimulation (DE-588)4690080-9 gnd Seitenwind (DE-588)4466542-8 gnd Personenkraftwagen (DE-588)4076001-7 gnd Aerodynamik (DE-588)4000589-6 gnd Bö (DE-588)4202927-2 gnd |
| subject_GND | (DE-588)4132734-2 (DE-588)4690080-9 (DE-588)4466542-8 (DE-588)4076001-7 (DE-588)4000589-6 (DE-588)4202927-2 (DE-588)4113937-9 |
| title | Quantitative analysis of vehicle aerodynamics during crosswind gusts |
| title_auth | Quantitative analysis of vehicle aerodynamics during crosswind gusts |
| title_exact_search | Quantitative analysis of vehicle aerodynamics during crosswind gusts |
| title_full | Quantitative analysis of vehicle aerodynamics during crosswind gusts Johannes D. Wojciak |
| title_fullStr | Quantitative analysis of vehicle aerodynamics during crosswind gusts Johannes D. Wojciak |
| title_full_unstemmed | Quantitative analysis of vehicle aerodynamics during crosswind gusts Johannes D. Wojciak |
| title_short | Quantitative analysis of vehicle aerodynamics during crosswind gusts |
| title_sort | quantitative analysis of vehicle aerodynamics during crosswind gusts |
| topic | Instationäre Strömung (DE-588)4132734-2 gnd Numerische Strömungssimulation (DE-588)4690080-9 gnd Seitenwind (DE-588)4466542-8 gnd Personenkraftwagen (DE-588)4076001-7 gnd Aerodynamik (DE-588)4000589-6 gnd Bö (DE-588)4202927-2 gnd |
| topic_facet | Instationäre Strömung Numerische Strömungssimulation Seitenwind Personenkraftwagen Aerodynamik Bö Hochschulschrift |
| url | http://mediatum.ub.tum.de/node?id=1095887 https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120719-1095887-1-3 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025689500&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT wojciakjohannes quantitativeanalysisofvehicleaerodynamicsduringcrosswindgusts |