<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper presents the methodology and investigation of the sound power level produced by a radial piston aircraft engine operating at varied speeds. The research model aircraft engine of a maximum power of 5.5 kW with a two-bladed airscrew was placed on a test bend. Its sound power level was calculated from the sound pressure level measured at 9 measurement points distributed on a hemispherical surface in a confined space in line with PN-EN 3744. Mean sound power generated by the ASP FS400AR engine is 96 dB at idle (2,880 rpm) and 105 dB at a cruising speed (4,740 rpm). Accordingly, it can be concluded that a sound level meter registered a higher sound power level at the points in front of the model aircraft engine than at the points behind it, whereas the lowest sound power level was registered directly above the engine.</p>
</abstract>

This paper presents the methodology and investigation of the sound power level produced by a radial piston aircraft engine operating at varied speeds. The research model aircraft engine of a maximum power of 5.5 kW with a two-bladed airscrew was placed on a test bend. Its sound power level was calculated from the sound pressure level measured at 9 measurement points distributed on a hemispherical surface in a confined space in line with PN-EN 3744. Mean sound power generated by the ASP FS400AR engine is 96 dB at idle (2,880 rpm) and 105 dB at a cruising speed (4,740 rpm). Accordingly, it can be concluded that a sound level meter registered a higher sound power level at the points in front of the model aircraft engine than at the points behind it, whereas the lowest sound power level was registered directly above the engine.

The Research of Acoustic Emission of a Low-Power Aircraft Engine

Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems

Faculty of Mechanical Engineering, Lublin University of Technology

Transactions on Aerospace Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"The Research of Acoustic Emission of a Low-Power Aircraft Engine"}

This paper presents the methodology and investigation of the sound power level produced by a radial piston aircraft engine operating at varied speeds. The...

The Research of Acoustic Emission of a Low-Power Aircraft Engine

Published Online: Sep 04, 2019

Page range: 14 - 25

DOI: https://doi.org/10.2478/tar-2018-0019

Keywords
model aircraft engine, aerospace propulsion systems, sound power, noise

© 2017 Copyright by Lukasiewicz Research Network – Institute of Aviation

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The Research of Acoustic Emission of a Low-Power Aircraft Engine

Published Online: Sep 04, 2019

Page range: 14 - 25

DOI: https://doi.org/10.2478/tar-2018-0019

Keywordsmodel aircraft engine, aerospace propulsion systems, sound power, noise

© 2017 Copyright by Lukasiewicz Research Network – Institute of Aviation

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
model aircraft engine, aerospace propulsion systems, sound power, noise