Tonal and Broadband Noise Calculations for Aeroacoustic Optimization of a Pusher Propeller

Pagano, Antonio; Barbarino, Mattia; Casalino, Damiano; Federico, Luigi

doi:10.2514/1.45315

Cited by 45 publications

(22 citation statements)

References 21 publications

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“…Calculations with a time-domain linearized version of the FWH equation [36] including non-uniform propeller inflow and time-varying blade loads [34]. acoustically better installation solutions, as for example in [41] or in the German BNF project [42,43] for a tractor configuration and in the European CESAR project [44,45] for a pusher configuration.…”

Section: Steady and Unsteady Euler Simulations Combinedmentioning

confidence: 99%

Propeller installation effects on turboprop aircraft acoustics

Chirico

Barakos

Bown³

2018

Journal of Sound and Vibration

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Section: Steady and Unsteady Euler Simulations Combinedmentioning

confidence: 99%

Propeller installation effects on turboprop aircraft acoustics

Chirico

Barakos

Bown³

2018

Journal of Sound and Vibration

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“…Note that the exact form of the method proposed by Schlinker and Amiet appears to be somewhat controversial. Similar methods have been used by Pagano et al (32) , Rozenberg et al (33) and Sinayoko et al (34) . Alternative methods for predicting rotor self-noise, based on the exact solution for a rotating point force, have also been proposed by Kim and George (35) , Chou and George (36) , Zhou and Joseph (37) and finally Sinayoko et al (34) who show that both approaches to self-noise prediction are comparable.…”

Section: Broadband Noise Predictionmentioning

confidence: 92%

Advanced open rotor noise prediction

Kingan

2014

Aeronaut. j. (1968)

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The purpose of this paper is to describe the current status of open rotor noise prediction methods and to highlight future challenges in this area. A number of analytic and numerical methods are described which can be used for predicting 'isolated' and 'installed' open rotor tonal noise. Broadband noise prediction methods are also described and it is noted that further development and validation of the current models is required. The paper concludes with a discussion of the analytical methods which are used to assess the acoustic data collected during the high-speed wind-tunnel testing of a model scale advanced open rotor rig. IntroductIonThe advanced open rotor offers potentially significant reductions in fuel burn relative to current generation turbo-fan engines. Because of this significant benefit, the open rotor is currently being investigated by a number of leading aeronautical companies as a potential aircraft propulsor. A cut-away view of an open rotor concept is shown in Fig. 1 below. The engine consists of two contra-rotating rotors which, in this case, are driven by a gas turbine engine housed within a large centrebody which protrudes both fore and aft of the rotors. In order to be a viable aircraft engine, the open rotor will need to meet stringent noise certification standards and thus, a range of prediction methods are required for assessing the noise produced by various open rotor designs. These range from simple analytical methods, which are useful for design optimisation studies e.g. Parry and Vianello (1) , to high-fidelity CFD/CAA methods which are useful for design validation e.g. Colin et al. (2) . The purpose of this paper is to describe a range of noise prediction methods and, in particular, to highlight recent developments and to identify further work which is required.

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“…Regarding the broadband noise, a general and global model is not yet reported and thus scaling noise laws (35) and semiempirical approaches based on specific source mechanisms (e.g. Proudman's method (36,37) or models derived from exact solutions of flat-plate acoustic scattering problems (38)(39)(40)(41)(42) ) are usually adopted (see for example the approaches used in (43) or (44) ). In this work, the broadband noise contribution is not modelled.…”

Section: Propeller Noise: Physics and Methodsmentioning

confidence: 99%

Numerical aeroacoustic analysis of propeller designs

Chirico

Barakos

Bown³

2017

Aeronaut. j.

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As propeller-driven aircraft are the best choice for short/middle-haul flights, but their acoustic emissions may require improvements to comply with future noise certification standards, this work aims to numerically evaluate the acoustics of different modern propeller designs. Overall sound pressure level and noise spectra of various blade geometries and hub configurations are compared on a surface representing the exterior fuselage of a typical large turboprop aircraft. Interior cabin noise is also evaluated using the transfer function of a Fokker 50 aircraft. A blade design operating at lower RPM and with the span-wise loading moved inboard is shown to be significantly quieter without severe performance penalties. The employed CFD method is able to reproduce the tonal content of all blades and its dependence on hub and blade design features.

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Tonal and Broadband Noise Calculations for Aeroacoustic Optimization of a Pusher Propeller

Cited by 45 publications

References 21 publications

Propeller installation effects on turboprop aircraft acoustics

Propeller installation effects on turboprop aircraft acoustics

Advanced open rotor noise prediction

Numerical aeroacoustic analysis of propeller designs

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