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A Study on Aerodynamic Noise Reduction Depending on UAM Main Propeller Lay-out
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Type
Academic journal
Author
Chang Ho Son (대구가톨릭대학교) Jihun Song (한국항공우주산업) Dong-Ryul Lee (대구가톨릭대학교)
Journal
Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering Vol.40 No.9 KCI Accredited Journals SCOPUS
Published
2023.9
Pages
741 - 750 (10page)
DOI
10.7736/JKSPE.023.059

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A Study on Aerodynamic Noise Reduction Depending on UAM Main Propeller Lay-out
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Abstract· Keywords

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Recently, as UAM has been in the spotlight worldwide, the issue of aerodynamic noise generated from propellers has emerged. Therefore, changes in thrust and aerodynamic noise were compared while changing the propeller lay-out distance. The designed propeller model was analyzed using ANSYS Fluent, a CFD software. Based on steady-state analysis, transient analysis was performed, and SPL was calculated using the FW-H noise model. Based on the standard propeller lay-out distance of 0.1 R (0.12 mm), 5 cases from 0.2 R to 0.6 R were compared with the reference model at equal intervals of 0.1 R. The thrust increased by up to 3.5% as the propeller distance increased. In most listeners positioned to measure SPL, noise was reduced by 0.07-0.7% in the improved model compared to the reference model due to reduction in local vorticity. However, because pressure fluctuation due to the increase in thrust and high SPL in the low-frequency region were measured, noise increased by 0.6% to 3.5% in some listeners. Increasing the propeller distance enhances thrust performance, but inevitably increases noise due to pressure fluctuations and SPL in the low-frequency region. Therefore, strict analysis of noise prediction according to a specific frequency and various design shapes are needed.
#Virtual fluid dynamics(가상 유체역학) #Aerodynamic noise(공력소음) #Vertical take-off and landing(수직이착륙기) #Multirotor(다중로터) #UAM propeller(UAM 프로펠러) #Sound pressure level(음압 레벨)

Contents

1. 서론
2. Propeller 모델 및 설계
3. 수치해석
4. 결과 및 고찰
5. 결론
REFERENCES

References (12)

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Chung, K. H., Kim, D. H., Kim, D. K., Song, K. W., Kim, S. H., Hwang, C. J., (2010), Introduction to international research trends and domestic research plans for the noise reduction of helicopter rotor blade, Proceedings of the Korean Society for Noise a google schola Marzouk, O. A., (2022), Urban air mobility and flying cars: Overview, examples, prospects, drawbacks, and solutions, Journal of the Open Engineering, 12(1), 662-679. google schola Guo, J., Zhou, T., Fang, Y., Zhang, X., (2021), Experimental study on a compact lined circular duct for small-scale propeller noise reduction, Journal of the Applied Acoustics, 179(108062), 1-10. google schola Malgoezar, A. M., Vieira, A., Snellen, M., Simons, D. G., Veldhuis, L. L., (2019), Experimental characterization of noise radiation from a ducted propeller of an unmanned aerial vehicle, International Journal of Aeroacoustics, 18(4-5), 372-391. google schola Noda, R., Nakata, T., Ikeda, T., Chen, D., Yoshinaga, Y., Ishibashi, K., Rao, C., Liu, H., (2018), Development of bioinspired low-noise propeller for a drone, Journal of Robotics and Mechatronics, 30(3), 337-343. google schola

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