On the tip leakage noise generating mechanisms of single-fixed aerofoil
On the tip leakage noise generating mechanisms of single-fixed aerofoil
Among the various noise sources related to duct fans, the noise generated by the tip leakage flow when interacts with the blade geometric singularities is one of the least understood noise sources. This paper deals with characterising the various tip noise generating mechanisms for a single-fixed aerofoil, as it is difficult to distinguish them in a real rotating fan rig. Simultaneous near and far-field pressure measurements, together with Particle Image Velocimetry (PIV) and hot-wire measurements, have highlighted the existence of two distinct humps in the pressure spectra. It has been shown that the first hump is related to a flow separation that occurs at the pressure side edge, whereas the second peak is linked with the strong tip flow. Furthermore, a parametric study of gap size, angle of attack and inflow velocity shows that the tip noise sources depends only on the first two parameters.
Saraceno, Ivan
9c74b5c9-b834-43cc-b26d-9408b0534304
Palleja Cabre, Sergi
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Paruchuri, Chaitanya
5c1def64-6347-4be3-ac2d-b9f6a314b81d
Jaiswal, Prateek
eca47561-3abe-4b48-b914-9b274eb9765a
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
13 June 2022
Saraceno, Ivan
9c74b5c9-b834-43cc-b26d-9408b0534304
Palleja Cabre, Sergi
b841a96c-05d1-4f08-a197-8693cb3a3f90
Paruchuri, Chaitanya
5c1def64-6347-4be3-ac2d-b9f6a314b81d
Jaiswal, Prateek
eca47561-3abe-4b48-b914-9b274eb9765a
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
Saraceno, Ivan, Palleja Cabre, Sergi, Paruchuri, Chaitanya, Jaiswal, Prateek and Ganapathisubramani, Bharathram
(2022)
On the tip leakage noise generating mechanisms of single-fixed aerofoil.
In 28th AIAA/CEAS Aeroacoustics 2022 Conference.
(doi:10.2514/6.2022-2881).
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Conference or Workshop Item
(Paper)
Abstract
Among the various noise sources related to duct fans, the noise generated by the tip leakage flow when interacts with the blade geometric singularities is one of the least understood noise sources. This paper deals with characterising the various tip noise generating mechanisms for a single-fixed aerofoil, as it is difficult to distinguish them in a real rotating fan rig. Simultaneous near and far-field pressure measurements, together with Particle Image Velocimetry (PIV) and hot-wire measurements, have highlighted the existence of two distinct humps in the pressure spectra. It has been shown that the first hump is related to a flow separation that occurs at the pressure side edge, whereas the second peak is linked with the strong tip flow. Furthermore, a parametric study of gap size, angle of attack and inflow velocity shows that the tip noise sources depends only on the first two parameters.
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Published date: 13 June 2022
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Funding Information:
The first author would like to acknowledge the financial support of the Royal Academy of Engineering (RF\201819 \ 18 \ 194). The authors would also like to thanks Rolls-Royce for technical support.
Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
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Local EPrints ID: 467529
URI: http://eprints.soton.ac.uk/id/eprint/467529
PURE UUID: b758471c-91de-4d01-b1fa-66d12d1b4812
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Date deposited: 12 Jul 2022 16:40
Last modified: 17 Mar 2024 03:48
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Author:
Ivan Saraceno
Author:
Prateek Jaiswal
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