Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Aachen
Shaker Verlag
2018
|
| Series: | Schriftenreihe des Instituts für Modellierung und Berechnung
2018,27 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | xii, 182 Seiten Illustrationen, Diagramme 21 cm x 14.8 cm, 300 g |
| ISBN: | 9783844058468 384405846X |
Staff View
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| 245 | 1 | 0 | |a Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach |c Syed Fawad Raza Ali Bokhari |
| 264 | 1 | |a Aachen |b Shaker Verlag |c 2018 | |
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| 490 | 1 | |a Schriftenreihe des Instituts für Modellierung und Berechnung |v 2018,27 | |
| 502 | |b Dissertation |c Technische Universität Hamburg-Harburg |d 2017 | ||
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Record in the Search Index
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| adam_text | CONTENTS
N OM
ENCLATURE.....................................................................................................................
V
1 INTRODUCTION 1
1.1 MOTIVATION
..............................................................................................................
1
1.2 THESIS
OBJECTIVE........................................................................................................
3
1.3 THESIS APPROACH
.....................................................................................................
4
1.4 LITERATURE SURVEY AND STATE-OF-THE-ART
............................................................... 5
1.4.1 DIMENSIONAL ANALYSIS AND DESIGN OF EXPERIMENTS
................................ 5
1.4.2 STATISTICAL HYPOTHESIS TESTING AND EXPLORATORY DATA A N A LY SE S
..............
6
1.4.3 MODEL IDENTIFICATION AND PARAMETER O P TIM IZ A TIO N
................................ 7
1.4.4 STATISTICAL PERFORMANCE OF A M O D E L
......................................................... 8
1.5 OVERVIEW
.................................................................................................................
9
2 FLOW NOISE MODELLING, ISSUES AND AN ALTERNATIVE 11
2.1 FLUID FLOW AND FLOW NOISE
.....................................................................................
11
2.1.1 FLUID FLO W ............................................... 12
2.1.2 FLOW
NOISE.....................................................................................................
13
2.2 TRADITIONAL MODELLING TECHNIQUES FOR FLOW AND FLOW NOISE P RE D IC
TIO N
.................
14
2.2.1 FLUID FLO W
.....................................................................................................
14
2.2.2 FLOW
NOISE.....................................................................................................
16
2.3 ISSUES WITH RESPECT TO THE MODELLING TEC H N IQ U E S
...............................................
18
2.3.1 GENERAL ISSUES
..............................................................................................
18
2.3.2 COMPUTATIONAL ISSUES
..................................
19
2.4 EMPIRICAL MODELLING OF THE FLOW NOISE
...................................................................20
2.4.1 PRE-EXPERIMENTAL INVESTIGATION P H A S E
..........................................................22
2.4.2 PRE-MODELLING P H A S E
......................................................................................22
2.4.3 MODELLING P H A S E
............................................................................................
23
2.4.4 POST-MODELLING P H A SE
......................................................................................24
2.5 CHAPTER
CONCLUSION......................................................................................................24
3 PRE-EXPERIMENTAL INVESTIGATION PHASE 27
3.1 THE MATRIX METHOD: A DIMENSIONAL ANALYSIS A P P RO A C H
.......................................27
3.2 POWER NUMBER BASED DIMENSIONLESS QUANTITY
......................................................
28
3.3 DIMENSIONLESS OPERATING P O I N T S
...............................................................................
32
3.4 DIMENSIONAL ANALYSIS FOR DIFFERENT COM
PONENTS..........................................................33
3.4.1 SINGLE-HOLE ORIFICE
.........................................................................................
33
3.4.2 BRANCHED D U C T
................................................................................................35
3.4.3 A IR-O U TLE
T.........................................................................................................37
3.5 FLOW NOISE EXPERIMENTAL ENVIRONM
ENT........................................................................38
3.6 DESIGN OF E X P E RIM E N TS
...............................................................................................
42
3.7 CHAPTER
CONCLUSION......................................................................................................45
4 MODELLING, AND PRE- AND POST-MODELLING PHASES 47
4.1 PRE-MODELLING P H A S E
...................................................................................................47
4.1.1 STATISTICAL HYPOTHESIS T E S T I N G
......................................................................
47
4.1.2 EXPLORATORY DATA A N ALY
SES.............................................................................49
4.1.3 PROCESS CAPABILITY ANALYSIS
.........................................................................
51
4.1.4 INPUT SENSITIVITY A N A LY S E S
.............................................................................53
4.1.4.1 ANALYSIS OF V A RIA N C E
.......................................................................
53
4.1.4.2 CORRELATION A N A LY S IS
.......................................................................
54
4.1.5 REPRODUCIBILITY AND REP EATAB ILITY
................................................................57
4.2 MODELLING PHASE
.
.........................................................................................................58
4.2.1 SUBJECTIVE AND SYSTEMATIC SELECTION OF THE MODEL STRUCTURE
..................
59
4.2.2 NEURO-FUZZY BASED SELECTION OF THE MODEL S TR U C TU R E
................................
60
4.2.2.1 ARTIFICIAL NEURAL NETWORKS
...........................................................61
4.2.2.2 FUZZY SYSTEM, RBF NETWORK AND NEURO-FUZZY SYSTEM .... 63
4.2.2.3 NEURO-FUZZY BASED LOCAL MODEL NETWORKS
.
...................................
64
4.2.2.4 CRITERIA OF MAXIMUM ACCEPTABLE ERROR AND MAXIMUM ITERATIONS 68
4.2.2.5 LMN BASED MODEL FOR THE SINGLE-HOLE ORIFICE
..............................
68
4.3 POST-MODELLING P H A SE
...............................................................................................
70
4.3.1 STATISTICAL PERFORMANCE OF A M O D E L
.............................................................70
4.3.1.1 RESIDUAL A N A L Y S E S
...........................................................................71
4.3.1.2 TAYLOR*S DIAGRAM
.......................................................................
73
4.3.2 CONTROL CHARTS
............................................................................................
73
4.3.3 ANOVA AND CORRELATION A N ALY SE
S................................................................ 74
4.4 SUMMARY OF THE FRAMEWORK FOR AN EMPIRICAL M O D ELLIN G
.........................................75
4.5 CHAPTER
CONCLUSION..................................................................................................
78
5 EMPIRICAL MODELLING FOR DIFFERENT COMPONENTS OF THE AIR DISTRIBUTION
SYSTEM 81
5.1 SUBJECTIVE M
ODELLING...................................................................................................81
5.2 SINGLE-HOLE ORIFICE
......................................................................................................82
5.2.1 PRE-MODELLING P H A S E
......................................................................................
82
5.2.2 MODELLING P H A S E ......................... 82
5.2.2.1 EFFECT OF THE HELMHOLTZ NUMBER
................................
82
5.2.2.2 EFFECT OF THE DIAMETER R A T I O
..........................................................83
5.2.2.3 EFFECT OF THE REYNOLDS N U M B E R
....................................................
84
5.2.2.4 FINALISING THE MODEL STRUCTURE AND ESTIMATING THE UNKNOWN
P A RA M E TE
RS......................................................................................85
5.2.3 POST-MODELLING P H ASE
...............
89
5.2.3.1 RESIDUAL ANALYSES AND TAYLOR*S D IA G RA M
.....................................89
5.2.3.2 PREDICTING THE POWER NUMBER BASED ACOUSTIC QUANTITY . . . 89
5.2.3.3 PREDICTING THE SOUND POWER LE V E L
.................................................
90
5.2.3.4 ANOVA AND CORRELATION
ANALYSES................................................90
5.3 BRANCHED DUCT
............................................................................................................92
5.3.1 PRE-MODELLING PHASE FOR THE MAIN BRANCH
................................................
92
5.3.2 MODELLING PHASE FOR THE MAIN B RA N C H
.........................................................
95
5.3.2.1 EFFECT OF THE HELMHOLTZ NUMBER
.................................................
97
5.3.2.2 EFFECT OF THE REYNOLDS N U M B E R
....................................................
99
5.3.2 3 EFFECT OF THE VOLUME FLOW R A T I O
...................................................100
5.3.2.4 EFFECT OF THE BRANCH ANGLE
.........................................................100
5.3.2.5 FINALISING THE MODEL STRUCTURE AND ESTIMATING THE UNKNOWN
P A RA M E TE
RS....................................................................................
101
5.3.3 POST-MODELLING PHASE FOR THE MAIN B RA N C H
..............................................
105
5.3.3.1 RESIDUAL ANALYSES AND TAYLOR*S D IA G RA M
...................................105
5.3.3.2 PREDICTING THE POWER NUMBER BASED ACOUSTIC QUANTITY AND
SOUND POWER L E V E L
.......................................................................
107
5.3.3.3 ANOVA AND CORRELATION ANALYSES
...............................................
108
5.3.4 PRE-MODELLING PHASE FOR THE SIDE B R A N C H
.................................................
109
5.3.5 MODELLING PHASE FOR THE SIDE B R A N C H
............................
110
5.3.6 POST-MODELLING PHASE FOR THE SIDE B RANCH
..................
118
5.3.6.1 RESIDUAL ANALYSES AND TAYLOR*S D IA G RA M
...................................118
5.3.6.2 PREDICTING THE POWER NUMBER BASED ACOUSTIC QUANTITY AND
THE SOUND POWER L E V E L
................................................................. 121
5.3.6.3 ANOVA AND CORRELATION ANALYSES
...............................................
121
5.4 A IR-O U TLE
T....................................................................................................................122
5.4.1 PRE-MODELLING P H A S E
............................................... 122
5.4.2 MODELLING P H A S E
..........................................................................................
125
5.4.3 POST-MODELLING P H
ASE....................................................................................
131
5.4.3.1 RESIDUAL ANALYSES AND TAYLOR*S D IA G RA M
...................................131
5.4.3.2 PREDICTING THE POWER NUMBER BASED ACOUSTIC QUANTITY AND
THE SOUND POWER L E V E L
................................................................. 132
5.4.3 3 ANOVA AND CORRELATION ANALYSES
............................................
133
5.5 CHAPTER
CONCLUSION....................................................................................................134
6 RESULTS: PREDICTION FOR CLUSTERS OF COMPONENTS 135
6.1 CLUSTER 1: SINGLE-HOLE ORIFICE AND
AIR-OUTLET..........................................................135
III
6.2 CLUSTER 2: SINGLE-HOLE ORIFICE AND BRANCHED D U C T
.................................................
135
6.3 CLUSTER 3: SINGLE-HOLE ORIFICE, BRANCHED DUCT AND A IR-O U TLET
............................
136
6.4 A REPRESENTATIVE SIMULATION OF AIR DISTRIBUTION SYSTEM
...................................137
6.5 CHAPTER
CONCLUSION....................................................................................................
139
7 CONCLUSIONS AND OUTLOOK 157
A STATISTICAL METHODS 161
A.L SUMMARY OF DIFFERENT EDA TE C H N IQ U E
S...................................................................161
A.2 A N O V A
.......................................................................................................................162
A.3 BOX PLOT
....................................................................................................................163
A.4 CORRELATION ANALYSIS
.................................................................................................163
A.5 BIAS AND VARIANCE E R R O R
...........................................................................................165
B GRADIENT BASED PARAMETER OPTIMIZATION 167
C AIR DISTRIBUTION IN AN AIRCRAFT 169
BIBLIOGRAPHY 171
|
| any_adam_object | 1 |
| author | Bokhari, Syed Fawad Raza Ali |
| author_GND | (DE-588)1156296226 |
| author_facet | Bokhari, Syed Fawad Raza Ali |
| author_role | aut |
| author_sort | Bokhari, Syed Fawad Raza Ali |
| author_variant | s f r a b sfra sfrab |
| building | Verbundindex |
| bvnumber | BV044987488 |
| classification_rvk | ZO 7272 |
| ctrlnum | (OCoLC)1048207864 (DE-599)DNB1152959670 |
| discipline | Maschinenbau / Maschinenwesen Verkehr / Transport |
| format | Thesis Book |
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| illustrated | Illustrated |
| indexdate | 2024-07-10T08:06:26Z |
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| institution_GND | (DE-588)1064118135 |
| isbn | 9783844058468 384405846X |
| language | English |
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| physical | xii, 182 Seiten Illustrationen, Diagramme 21 cm x 14.8 cm, 300 g |
| publishDate | 2018 |
| publishDateSearch | 2018 |
| publishDateSort | 2018 |
| publisher | Shaker Verlag |
| record_format | marc |
| series | Schriftenreihe des Instituts für Modellierung und Berechnung |
| series2 | Schriftenreihe des Instituts für Modellierung und Berechnung |
| spelling | Bokhari, Syed Fawad Raza Ali Verfasser (DE-588)1156296226 aut Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach Syed Fawad Raza Ali Bokhari Aachen Shaker Verlag 2018 xii, 182 Seiten Illustrationen, Diagramme 21 cm x 14.8 cm, 300 g txt rdacontent n rdamedia nc rdacarrier Schriftenreihe des Instituts für Modellierung und Berechnung 2018,27 Dissertation Technische Universität Hamburg-Harburg 2017 Strömungsakustik (DE-588)4116645-0 gnd rswk-swf Klimaanlage (DE-588)4120572-8 gnd rswk-swf Flugzeugkabine (DE-588)4154784-6 gnd rswk-swf Nichtlineares mathematisches Modell (DE-588)4127859-8 gnd rswk-swf Luftströmung (DE-588)4338131-5 gnd rswk-swf Geräuschanalyse (DE-588)4324422-1 gnd rswk-swf Aeroacoustics Artificial Neural Networks Emipirical modelling Flow noise Neuro Fuzzy (DE-588)4113937-9 Hochschulschrift gnd-content Flugzeugkabine (DE-588)4154784-6 s Klimaanlage (DE-588)4120572-8 s Luftströmung (DE-588)4338131-5 s Strömungsakustik (DE-588)4116645-0 s Geräuschanalyse (DE-588)4324422-1 s Nichtlineares mathematisches Modell (DE-588)4127859-8 s DE-604 Shaker Verlag (DE-588)1064118135 pbl Schriftenreihe des Instituts für Modellierung und Berechnung 2018,27 (DE-604)BV037366610 2018,27 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=030379742&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Bokhari, Syed Fawad Raza Ali Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach Schriftenreihe des Instituts für Modellierung und Berechnung Strömungsakustik (DE-588)4116645-0 gnd Klimaanlage (DE-588)4120572-8 gnd Flugzeugkabine (DE-588)4154784-6 gnd Nichtlineares mathematisches Modell (DE-588)4127859-8 gnd Luftströmung (DE-588)4338131-5 gnd Geräuschanalyse (DE-588)4324422-1 gnd |
| subject_GND | (DE-588)4116645-0 (DE-588)4120572-8 (DE-588)4154784-6 (DE-588)4127859-8 (DE-588)4338131-5 (DE-588)4324422-1 (DE-588)4113937-9 |
| title | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach |
| title_auth | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach |
| title_exact_search | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach |
| title_full | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach Syed Fawad Raza Ali Bokhari |
| title_fullStr | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach Syed Fawad Raza Ali Bokhari |
| title_full_unstemmed | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach Syed Fawad Raza Ali Bokhari |
| title_short | Modelling of flow noise inside an aircraft air distribution system: A non-linear empirical modelling approach |
| title_sort | modelling of flow noise inside an aircraft air distribution system a non linear empirical modelling approach |
| topic | Strömungsakustik (DE-588)4116645-0 gnd Klimaanlage (DE-588)4120572-8 gnd Flugzeugkabine (DE-588)4154784-6 gnd Nichtlineares mathematisches Modell (DE-588)4127859-8 gnd Luftströmung (DE-588)4338131-5 gnd Geräuschanalyse (DE-588)4324422-1 gnd |
| topic_facet | Strömungsakustik Klimaanlage Flugzeugkabine Nichtlineares mathematisches Modell Luftströmung Geräuschanalyse Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=030379742&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV037366610 |
| work_keys_str_mv | AT bokharisyedfawadrazaali modellingofflownoiseinsideanaircraftairdistributionsystemanonlinearempiricalmodellingapproach AT shakerverlag modellingofflownoiseinsideanaircraftairdistributionsystemanonlinearempiricalmodellingapproach |