A hybrid computational aeroacoustics method to simulate airframe noise:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Aachen
Shaker
2003
|
| Series: | Berichte aus der Strömungstechnik
|
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | IX, 205 S. Ill., graph. Darst. : 21 cm |
| ISBN: | 3832211969 |
Staff View
MARC
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| 100 | 1 | |a Ewert, Roland |d 1966- |e Verfasser |0 (DE-588)124523501 |4 aut | |
| 245 | 1 | 0 | |a A hybrid computational aeroacoustics method to simulate airframe noise |c Roland Ewert |
| 264 | 1 | |a Aachen |b Shaker |c 2003 | |
| 300 | |a IX, 205 S. |b Ill., graph. Darst. : 21 cm | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 0 | |a Berichte aus der Strömungstechnik | |
| 502 | |a Zugl.: Aachen, Techn. Hochsch., Diss., 2002 | ||
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| 856 | 4 | 2 | |m DNB Datenaustausch |q application/pdf |u http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010258585&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |3 Inhaltsverzeichnis |
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Record in the Search Index
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|---|---|
| adam_text |
CONTENTS
NOMENCLATURE
.
IV
SUMMARY
.
IX
1
INTRODUCTION
1
1.1
DIRECT
ACOUSTIC
SIMULATION
.
2
1.2
HYBRID
ACOUSTIC
SIMULATION
.
3
1.3
COMPUTATIONAL
AEROACOUSTICS
.
6
1.4
SCOPE
OF
THE
WORK
.
7
2
COMPUTATIONAL
AEROACOUSTIC
ALGORITHMS
9
2.1
GOVERNING
EQUATIONS
.
9
2.2
DISCRETIZATION
OF
THE
LINEARIZED
EULER
EQUATIONS
.
13
2.2.1
TRANSFORMATION
TO
GENERALIZED
COORDINATES
.
13
2.2.2
SPATIAL
DISCRETIZATION
.
16
2.2.3
TIME
INTEGRATION
.
23
2.2.4
DAMPING
.
28
2.3
BOUNDARY
CONDITIONS
.
32
2.3.1
NON-REFLECTING
FAR-FIELD
BOUNDARY
CONDITIONS
.
32
2.3.2
SOLID
WALL
BOUNDARY
CONDITION
.
45
3
HYBRID
ACOUSTIC
PREDICTION
METHODS
51
3.1
REVIEW
OF
HYBRID
ACOUSTIC
ANALOGY
APPLICATIONS
.
54
3.1.1
ACOUSTIC
ANALOGY
FORMULATIONS
.
54
3.1.2
APPLICATION
OF
ACOUSTIC
ANALOGIES
TO
AEROACOUSTIC
PROBLEMS
.
62
3.2
REVIEW
OF
ACOUSTIC
DISTURBANCE
EQUATIONS
.
64
3.2.1
LEE
WITH
MOMENTUM
SOURCES
.
68
3.2.2
VISCOUS/ACOUSTIC
SPLITTING
TECHNIQUES
.
68
3.3
SOURCE
FILTERING
.
70
3.3.1
VALIDATION
OF
SOURCE
FILTERING
.
73
3.4
ACOUSTIC
PERTURBATION
EQUATIONS
(APE)
.
77
3.4.1
DERIVATION
OF
THE
FUNDAMENTAL
SYSTEM
.
77
3.4.2
DISCUSSIONOFTHE
APE
1
SYSTEM
.
82
3.4.3
APE
VARIANT
2
.
83
II
CONTENTS
3.4.4
STABILITY
OF
THE
ACOUSTIC
PERTURBATION
EQUATIONS
.
84
3.4.5
APE
VARIANT
3
.
88
3.4.6
APE
VARIANT
4
.
89
4
RESULTS
93
4.1
CAA
ALGORITHMS
VALIDATION
.
94
4.1.1
SPATIAL
DISCRETIZATION
.
94
4.1.2
NON-REFLECTING
BOUNDARY
CONDITIONS
.
95
4.1.3
SOLID
WALL
BOUNDARY
CONDITION
.
97
4.1.4
VALIDATION
FOR
NON-UNIFORM
MEAN
FLOWS
.
100
4.1.5
DIRECT
SOUND
SOURCE
SIMULATION
.
102
4.2
COMPUTATIONAL
RESULTS
APPLYING
APE
'
S
.
105
4.2.1
WAVE
PROPAGATION
IN
A
SHEARED
MEAN
FLOW
.
105
4.2.2
SOUND
GENERATION
OF
A
SPINNING
VORTEX
PAIR
.
108
4.2.3
APE
BOUNDARY
CORRECTIONS
ON
ARTIFICIAL
INTERIOR
BOUNDARIES
.
ILL
4.2.4
CYLINDER
IN
A
CROSSFLOW
.
115
4.3
SIMULATION
OF
TRAILING
EDGE
NOISE
.
118
4.3.1
LARGE
EDDY
SIMULATION
.
118
4.3.2
SOUND
PRESSURE
LEVEL
CALCULATION
.
119
4.3.3
ACOUSTIC
SIMULATION
.
120
5
SUMMARY
AND
CONCLUSIONS
123
BIBLIOGRAPHY
125
FIGURES
135
APPENDIX
181
A
REFERENCE
SCALES
AND
NUMBERS
181
B
COORDINATE
TRANSFORMATIONS
AND
METRIC
RELATIONS
183
C
DISPERSION
RELATIONS
AND
EIGENMODES
OF
THE
LINEARIZED
EULER
EQUATIONS
185
C.L
ENTROPY
MODE
.
188
C.2
VORTICITY
MODE
.
188
C.3
ACOUSTIC
MODES
.
189
D
ANALYTICAL
SOLUTIONS
TO
THE
BENCHMARK
PROBLEMS
191
D.L
FIRST
CAA
WORKSHOP
CATEGORY
3
PROBLEMS
.
191
D.2
FIRST
CAA
WORKSHOP
CATEGORY
4
PROBLEMS
.
192
D.3
SECOND
CAA
WORKSHOP
CATEGORY
1
PROBLEMS
.
193
D.4
ANALYTICAL
SOLUTION
FOR
AN
ENERGY
SOURCE
OVER
A
SOLID
WALL
.
197
III
E
CHARACTERISTIC
FORM
OF
THE
LINEARIZED
EULER
EQUATIONS
199
F
DERIVATION
OF
MOHRING
'
S
ACOUSTIC
ANALOGY
201 |
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| id | DE-604.BV016994205 |
| illustrated | Illustrated |
| indexdate | 2024-08-23T00:20:40Z |
| institution | BVB |
| isbn | 3832211969 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-010258585 |
| oclc_num | 76731008 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM DE-634 |
| owner_facet | DE-91 DE-BY-TUM DE-634 |
| physical | IX, 205 S. Ill., graph. Darst. : 21 cm |
| publishDate | 2003 |
| publishDateSearch | 2003 |
| publishDateSort | 2003 |
| publisher | Shaker |
| record_format | marc |
| series2 | Berichte aus der Strömungstechnik |
| spelling | Ewert, Roland 1966- Verfasser (DE-588)124523501 aut A hybrid computational aeroacoustics method to simulate airframe noise Roland Ewert Aachen Shaker 2003 IX, 205 S. Ill., graph. Darst. : 21 cm txt rdacontent n rdamedia nc rdacarrier Berichte aus der Strömungstechnik Zugl.: Aachen, Techn. Hochsch., Diss., 2002 Strömungsakustik (DE-588)4116645-0 gnd rswk-swf Flugwerk (DE-588)4708139-9 gnd rswk-swf Numerisches Verfahren (DE-588)4128130-5 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Flugwerk (DE-588)4708139-9 s Strömungsakustik (DE-588)4116645-0 s Numerisches Verfahren (DE-588)4128130-5 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010258585&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Ewert, Roland 1966- A hybrid computational aeroacoustics method to simulate airframe noise Strömungsakustik (DE-588)4116645-0 gnd Flugwerk (DE-588)4708139-9 gnd Numerisches Verfahren (DE-588)4128130-5 gnd |
| subject_GND | (DE-588)4116645-0 (DE-588)4708139-9 (DE-588)4128130-5 (DE-588)4113937-9 |
| title | A hybrid computational aeroacoustics method to simulate airframe noise |
| title_auth | A hybrid computational aeroacoustics method to simulate airframe noise |
| title_exact_search | A hybrid computational aeroacoustics method to simulate airframe noise |
| title_full | A hybrid computational aeroacoustics method to simulate airframe noise Roland Ewert |
| title_fullStr | A hybrid computational aeroacoustics method to simulate airframe noise Roland Ewert |
| title_full_unstemmed | A hybrid computational aeroacoustics method to simulate airframe noise Roland Ewert |
| title_short | A hybrid computational aeroacoustics method to simulate airframe noise |
| title_sort | a hybrid computational aeroacoustics method to simulate airframe noise |
| topic | Strömungsakustik (DE-588)4116645-0 gnd Flugwerk (DE-588)4708139-9 gnd Numerisches Verfahren (DE-588)4128130-5 gnd |
| topic_facet | Strömungsakustik Flugwerk Numerisches Verfahren Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010258585&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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