Dissertation/ Thesis
Aerodynamic and aeroelastic investigation of a composite fan for ultra-high-bypass-ratio aircraft engines ; Étude aérodynamique et aéroélastique d'une soufflante en matériaux composites pour les moteurs d'avion à très haut taux de dilution
| العنوان: | Aerodynamic and aeroelastic investigation of a composite fan for ultra-high-bypass-ratio aircraft engines ; Étude aérodynamique et aéroélastique d'une soufflante en matériaux composites pour les moteurs d'avion à très haut taux de dilution |
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| المؤلفون: | Schneider, Alexandra Patrizia |
| المساهمون: | Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Ecole Centrale de Lyon, Christoph Brandstetter, Xavier Ottavy |
| المصدر: | https://theses.hal.science/tel-04685881 ; Other. Ecole Centrale de Lyon, 2024. English. ⟨NNT : 2024ECDL0018⟩. |
| بيانات النشر: | CCSD |
| سنة النشر: | 2024 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | UHBR fan, Aerodynamic performance, Instability mechanisms, Non-synchronous vibration, Structural mistuning, Aerodynamic asymmetry, Fan UHBR, Performances aérodynamiques, Mécanismes d'instabilité, Vibrations non-synchrones, Désaccordage structurel, Asymétrie aérodynamique, [SPI.OTHER]Engineering Sciences [physics]/Other |
| الوصف: | Modern low-speed Ultra-High Bypass Ratio (UHBR) fans operate predominantly on the flat part of the compression characteristic, have shorter intake lengths, and employ flexible, lightweight, composite blades. These changes promote the evolution of different types of instabilities with multi-physical interactions such as convective non-synchronous vibration (NSV). To enable further technological ad-vancements, experimental benchmark data on representative geometries required. Within this con-text, the European project CATANA was initiated at Ecole Centrale de Lyon. The open-test-case fan stage ECL5 was designed, following industrial guidelines, and tested experimentally on the facility ECL-B3. This thesis presents the experimental results of the CATANA project. The experimental investiga-tion of the ECL5 reference configuration shows that all design goals have been reached. The machine is operational in a wide range and aerodynamic performance at design condition is exactly coincident with the numerical prediction. In contrast, instability mechanisms are more complex than predicted by the employed numerical methods. Through application of synchronized multi-physical instrumenta-tion, the involved complex fluid-structure interaction is resolved. The analysis of the influence of in-flow conditions and geometrical and structural system symmetry allows to identify the sensitivity of aerodynamic and structural characteristics and the behavior close to the stability limit. The investiga-tion of a second rotor configuration featuring structural mistuning highlights the importance of geo-metrical blade-to-blade variations. They cause an asymmetry of the aerodynamic field at the blade tip and suppress coherently propagating aerodynamic disturbances resulting in a delayed onset of NSV. The results presented in this thesis provide a comprehensive multi-physical characterization of the ECL5 fan stage and serve as a benchmark data set for the validation of numerical simula-tions. ; Les fans modernes à faible vitesse de ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | NNT: 2024ECDL0018 |
| الاتاحة: | https://theses.hal.science/tel-04685881 https://theses.hal.science/tel-04685881v1/document https://theses.hal.science/tel-04685881v1/file/TH_2024ECDL0018.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.F393D10E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |