On the noise generation mechanisms of overlapping propellers
On the noise generation mechanisms of overlapping propellers
Overlapping propeller systems are currently used on some urban flight vehicles and will become increasingly common in future electric propulsion, since they provide one of the most compact platform volumes per unit thrust. This paper presents the results of a detailed experimental investigation of the dominant noise mechanisms due to two overlapping propellers at hover conditions. A detailed parametric study is performed to investigate the sensitivity of the radiated noise to the rotor axial separation distance z and the rotor radial separation distance d. An optimum separation distance to rotor diameter ratio of z/D of 0.25 is identified in this paper for co-axial rotor configurations, whereby minimum radiated noise is obtained. The reason for this optimum distance is explored and the balance between the various interaction noise sources in co-axial
Noise, Drone, Propeller
2281
Prior, Stephen
9c753e49-092a-4dc5-b4cd-6d5ff77e9ced
2 August 2021
Prior, Stephen
9c753e49-092a-4dc5-b4cd-6d5ff77e9ced
Prior, Stephen
(2021)
On the noise generation mechanisms of overlapping propellers.
AIAA AVIATION 2021 FORUM.
02 - 06 Aug 2021.
.
(doi:10.2514/6.2021-2281.vid).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Overlapping propeller systems are currently used on some urban flight vehicles and will become increasingly common in future electric propulsion, since they provide one of the most compact platform volumes per unit thrust. This paper presents the results of a detailed experimental investigation of the dominant noise mechanisms due to two overlapping propellers at hover conditions. A detailed parametric study is performed to investigate the sensitivity of the radiated noise to the rotor axial separation distance z and the rotor radial separation distance d. An optimum separation distance to rotor diameter ratio of z/D of 0.25 is identified in this paper for co-axial rotor configurations, whereby minimum radiated noise is obtained. The reason for this optimum distance is explored and the balance between the various interaction noise sources in co-axial
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Published date: 2 August 2021
Venue - Dates:
AIAA AVIATION 2021 FORUM, 2021-08-02 - 2021-08-06
Keywords:
Noise, Drone, Propeller
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Local EPrints ID: 453185
URI: http://eprints.soton.ac.uk/id/eprint/453185
PURE UUID: ce45923f-3937-4f27-b83e-99e70d7d1835
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Date deposited: 10 Jan 2022 18:03
Last modified: 17 Mar 2024 03:30
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