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Influence of Blade Deformations on Open-Rotor Low-Speed and High-Speed Aerodynamics and Aeroacoustics
- Source :
- Journal of Aircraft, Journal of Aircraft, American Institute of Aeronautics and Astronautics, 2018, pp.1-15. ⟨10.2514/1.C034676⟩
- Publication Year :
- 2018
- Publisher :
- American Institute of Aeronautics and Astronautics (AIAA), 2018.
-
Abstract
- International audience; This paper investigates by means of computational fluid dynamics (CFD) and acoustic analogy the influence of blade deformations on open-rotor aerodynamics and aeroacoustics for three key operating points: cruise, takeoff, and approach conditions. For each operating point, simulation results obtained with unrunning blade shapes and running blade shapes are compared with wind tunnel test measurements. Experiments show that blade deformations affect mostly the front rotor, with twist deviations at tip varying within a range of ±2 deg and of opposite sign between cruise and takeoff conditions. Although blade deformations are low for the rear rotor, aerodynamic performance exhibits significant variations due to the modifications of the front rotor wash. Numerical results show that accounting for blade deformations increases or decreases the thrust or power depending on the operating point and leads to a much better prediction of the open-rotor aerodynamic performance. The same comments apply for the noise prediction although differences on self-noise and interaction noise directivities are rather low.; Cet article étudie par simulation numérique influence des déformations de pale sur l'aérodynamique et l'aéroacoustique d'un doublet d'hélices contrarotatives pour trois points de fonctionnement différents: conditions de croisière, de décollage et d'approche. Pour chaque point de fonctionnement, les résultats des simulations obtenus avec des formes de pales à froid et à chaud sont comparés aux mesures effectuées sur la configuration générique Open-Rotor AI-PX7 d'Airbus Clean Sky dans la soufflerie transsonique S1MA de l'ONERA.
- Subjects :
- Blade (geometry)
Computer science
AEROACOUSTIQUE
Aerospace Engineering
Mechanical engineering
02 engineering and technology
Computational fluid dynamics
01 natural sciences
7. Clean energy
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
010305 fluids & plasmas
law.invention
0203 mechanical engineering
law
0103 physical sciences
AEROELASTICITE
Aerospace engineering
Physics
020301 aerospace & aeronautics
business.industry
Rotor (electric)
AERODYNAMIQUE
Aerodynamics
Low speed
Power coefficient
Aeroacoustics
HELICE CONTRAROTATIVE
business
Reynolds-averaged Navier–Stokes equations
Subjects
Details
- ISSN :
- 15333868 and 00218669
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Journal of Aircraft
- Accession number :
- edsair.doi.dedup.....3aca001f47897b8e6e13e6dd4069a6f6