 | Klabes A. Aircraft fuselage vibration excitation by turbulent boundary layer flow in cruise: Diss. … Dr.-Ing. / Deutsches Zentrum für Luft- und Raumfahrt, Institut für Aerodynamik und Strömungstechnik, Braunschweig. - Köln: DLR, 2017. - viii, xvii, 124 p.: ill., tab. - (Forschungsbericht; 2017-49). - Res. also Germ. - Bibliogr.: p.117-124. - ISSN 1434-8454
Шифр: (Pr 1120/2017-49) 02
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Vorwort ....................................................... III
Abstract ........................................................ V
Zusammenfassung ............................................... VII
List of Figures ................................................. v
List of Tables ................................................. ix
Nomenclature ................................................... xi
Latin nomenclature ............................................. xi
Greek nomenclature ............................................ xiv
List of indices ................................................ xv
General abbreviations ......................................... xvi
1 Introduction ............................................... 1
1.1 Motivation and Background .................................. 1
1.2 State of the Art ........................................... 2
1.3 Scope and Research Objectives .............................. 5
1.4 Outline .................................................... 6
2 Experimental Validation Database ........................... 9
2.1 Experimental Setup ........................................ 10
2.1.1 Pressure Measurement Equipment...................... 10
2.1.2 Vibration Measurement Equipment .................... 12
2.2 Auto-Spectra Measurement .................................. 15
2.2.1 Data Correction and Deficiencies ................... 16
2.2.2 Validation Auto-Spectra ............................ 20
2.2.3 Data Comparison .................................... 21
3 Fundamentals of Fuselage Excitation by Turbulent
Boundary Layer ............................................ 27
3.1 Auto-Spectra .............................................. 27
3.1.1 Robertson (1971) .................................... 29
3.1.2 Cockburn & Robertson (1974) ........................ 30
3.1.3 Chase (1980/1987) .................................. 30
3.1.4 Efimtsov (1982/1984) ............................... 31
3.1.5 Chase-Howe (1998) .................................. 32
3.1.6 Smol'yakov (2000) .................................. 32
3.1.7 Goody (2004) ....................................... 33
3.1.8 Rackl & Weston (2005) .............................. 33
3.1.9 Model Comparison ................................... 34
3.2 Wavenumber-Spectra ........................................ 36
3.2.1 Corcos (1964) ...................................... 40
3.2.2 Jolly (1968) ....................................... 41
3.2.3 Efimtsov (1982) .................................... 43
3.2.4 Smol'yakov and Tkachenko (1991) .................... 45
3.2.5 Smol'yakov (2006) .................................. 46
3.2.6 Chase (1980/1987) .................................. 48
3.2.7 Model Comparison ................................... 51
3.3 TBL - Fuselage Interaction, Graham's Method ............... 52
4 CFD Calculations and Analysis ............................. 57
4.1 Numerical Setup ........................................... 57
4.2 Analysis of Flow Parameters ............................... 62
5 Prediction Models ......................................... 67
5.1 CFD based Semi-Empirical Auto-Spectra Prediction Model .... 67
5.1.1 Model Parameter Study and Uncertainties ............ 67
5.1.2 Scaling Tests ...................................... 71
5.1.3 Parameter Description .............................. 75
5.1.4 Model Results ...................................... 81
5.2 CFD / CAA based Prediction ................................ 83
5.2.1 Data Preparation Method ............................ 84
5.2.2 Auto-Spectra Prediction ............................ 86
5.2.3 Wavenumber-Spectra Prediction ...................... 89
6 Results and Discussion .................................... 93
6.1 CFD based Semi-Empirical Auto-Spectra Prediction Model .... 93
6.2 Coupling - Flat Plate ..................................... 99
6.2.1 Varying Auto-Spectra ............................... 99
6.2.2 Varying Wavenumber-Frequency Spectra .............. 101
6.3 Coupling - Aircraft ...................................... 104
7 Conclusion and Outlook ................................... 113
Bibliography .................................................. 117
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