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Journal articles on the topic 'Propeller noise'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Sun, Jianwei, Koichi Yonezawa, Eiji Shima, and Hao Liu. "Experimental investigations on aerodynamic and psychoacoustic characteristics of three-blade looprop propeller." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A144. http://dx.doi.org/10.1121/10.0023064.

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Aeroacoustic noise in multiple rotor drones has been increasingly recognized as a crucial issue. This study focuses on addressing this challenge by introducing a novel low-noise looprop propeller design with three blades. Unlike traditional propellers, the looprop propeller utilizes three closed-loops to generate thrust. Through comprehensive experimental investigations conducted in an anechoic chamber using a hover stand test, we conducted an integrated study of the propeller's aerodynamic, aeroacoustic, and psychoacoustic characteristics. The results demonstrate that the three-blade looprop

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2

Jiang, Hanbo, Teng Zhou, Jingwen Guo, and Wangqiao Chen. "Numerical investigation of the blocking effect of a short duct on propeller noise." Journal of the Acoustical Society of America 153, no. 5 (2023): 2575. http://dx.doi.org/10.1121/10.0017975.

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Electric vertical and takeoff/landing vehicles for urban aerial mobility have attracted considerable attention in recent years. Some of these vehicles are equipped with ducted propellers to improve power efficiency, but the duct may also affect propeller noise generation and radiation. This work presents thorough numerical investigations to assess the importance of a short duct on propeller noise radiation. An analytical model is employed to predict noise emission from an isolated propeller, and the boundary element method is adopted to account for acoustic scattering effects. Additionally, an

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3

Mohd Zaki Bahrom, Bukhari Manshoor, Badrul Aisham Md Zain, et al. "Thrust Force for Drone Propeller with Normal and Serrated Trailing Edge." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 101, no. 1 (2023): 160–73. http://dx.doi.org/10.37934/arfmts.101.1.160173.

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The drone becomes more recognized in the civilian sector; the drone's popularity becomes increases as time goes by. Nevertheless, despite the excitement of flying drones, several types of issues occur caused by the drone. In some circumstances, the aeroacoustics noise is a big concern, and quiet drone propellers would be more environmentally friendly to the surrounding area. Moreover, the noise from the drone can be a nuisance for the surrounding population and animals. Therefore, a solution needs to be proposed to reduce the sound level produced by the drone so that drone can be piloted in a

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4

Wei, Wei, Yuanqing Ma, Shiyi Wei, Dongsheng Wang, Meng Guo, and Qingdong Yan. "Analysis and Evaluation of Aerodynamic Noise Characteristics of Toroidal Propeller." Drones 8, no. 12 (2024): 753. https://doi.org/10.3390/drones8120753.

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Toroidal propellers, a new type of drone propellers capable of significantly reducing noise, offer new possibilities for future low-altitude flying platforms. In this study, a numerical model was established to analyze the aerodynamic noise of the toroidal propeller under normal atmospheric conditions. The aerodynamic calculations for the toroidal and benchmark propellers were performed to obtain noise source information using a transient large eddy simulation. The hybrid computational aeroacoustic method was employed to calculate the noise spectrum at different speeds and locations. Moreover,

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5

Schmähl, Michael, and Mirko Hornung. "Optimization of propellers under consideration of aeroacoustic and aerodynamic goals and installation effects." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A111. http://dx.doi.org/10.1121/10.0026985.

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Advanced Air Mobility (AAM) vehicles like air taxis and cargo unmanned aerial vehicles (UAVs) operate close to urban areas. Therefore, it is necessary to keep the noise footprint of such aerial vehicles at a minimum to gain societal acceptance for AAM vehicle operations. Cargo UAVs are typically highly integrated in terms of functions leading to a high extent of aerodynamic interactions between propellers and the airframe. As a result of these installation effects, unsteady loading noise can become the dominant part of the aerial vehicle noise emissions which leads to a situation, where classi

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6

Bushkovsky, V. A., and Yu A. Yegorov. "Blade number effect upon high-frequency marine propulsor noise: model test data." Transactions of the Krylov State Research Centre 4, no. 402 (2022): 41–48. http://dx.doi.org/10.24937/2542-2324-2022-4-402-41-48.

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Object and purpose of research. This paper discusses blade systems of propellers and water jets. The purpose of the study was to outline the ways to mitigation of high-frequency non-cavitation noise of marine propulsors. Subject matter and methods. The study analyses Russian and foreign publications on aero- and hydroacoustics of propellers and foil systems. It also determines the parameters of turbulent boundary layer on propeller blades with respect to its effect upon propeller noise radiation. Noise assessment methods obtained for aerodynamics of foil systems have been applied to marine pro

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7

Ebrahimi, Abouzar, Mohammad Saeed Seif, and Ali Nouri-Borujerdi. "Hydro-Acoustic and Hydrodynamic Optimization of a Marine Propeller Using Genetic Algorithm, Boundary Element Method, and FW-H Equations." Journal of Marine Science and Engineering 7, no. 9 (2019): 321. http://dx.doi.org/10.3390/jmse7090321.

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Noise generated by ships is one of the most significant noises in seas, and the propeller has a significant impact on the noise of ships, which reducing it can significantly lower the noise of vessels. In this study, a genetic algorithm was used to optimize the hydro-acoustic and hydrodynamic performance of propellers. The main objectives of this optimization were to reduce the propeller noise and increase its hydrodynamic efficiency. Modifying the propeller geometry is one of the most effective methods for optimizing a propeller performance. One of the numerical methods for calculating propel

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8

Yao, Hua-Dong, Zhongjie Huang, Lars Davidson, Jiqiang Niu, and Zheng-Wei Chen. "Blade-Tip Vortex Noise Mitigation Traded-Off against Aerodynamic Design for Propellers of Future Electric Aircraft." Aerospace 9, no. 12 (2022): 825. http://dx.doi.org/10.3390/aerospace9120825.

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We study noise generation at the blade tips of propellers designed for future electric aircraft propulsion and, furthermore, analyze the interrelationship between noise mitigation and aerodynamics improvement in terms of propeller geometric designs. Classical propellers with three or six blades and a conceptual propeller with three joined dual-blades are compared to understand the effects of blade tip vortices on the noise generation and aerodynamics. The dual blade of the conceptual propeller is constructed by joining the tips of two sub-blades. These propellers are designed to operate under

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9

Sun, Jianwei, Koichi Yonezawa, Eiji Shima, and Hao Liu. "Integrated Evaluation of the Aeroacoustics and Psychoacoustics of a Single Propeller." International Journal of Environmental Research and Public Health 20, no. 3 (2023): 1955. http://dx.doi.org/10.3390/ijerph20031955.

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Aeroacoustic noise in multiple rotor drones has been increasingly recognized as a crucial issue, while noise reduction is normally associated with a trade-off between aerodynamic performance and sound suppression as well as sound quality improvement. Here, we propose an integrated methodology to evaluate both aeroacoustics and psychoacoustics of a single propeller. For a loop-type propeller, an experimental investigation was conducted in association with its aerodynamic and acoustic characteristics via a hover stand test in an anechoic chamber; the psychoacoustic performance was then examined

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10

M.R., Bagheri, Seif M.S., and Mehdigholi H. "Numerical Simulation of Underwater Propeller Noise." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 4, no. 1 (2014): 1–6. https://doi.org/10.36842/jomase.v4i1.514.

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Noise reduction and control is an important problem in the performance of underwater acoustic systems and in the habitability of the passenger ship for crew and passenger. Furthermore, sound generated by a propeller is critical in underwater detection and it is often related to the survivability of the vessel. This paper presents a numerical study on noises of the underwater propeller for different performance conditions. The non-cavitating and blade sheet cavitation noise generated by an underwater propeller is analyzed numerically in this study. The flow field is analyzed with finite volume

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11

HONG, Suk-Yoon, Song JEE-HUN, and Kim MIN-HYEOK. "Development of integrated noise analysis systems for ship propellers considering hull wake." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 9 (2024): 2078–89. http://dx.doi.org/10.3397/in_2024_3134.

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Recently, the requirements for underwater radiated noise (URN) reductions in ships have become significant issues, driven by concerns over the impact of naval vessel performance and noise on marine ecosystems. The majority of URN generated from ships is attributed to the propeller. This study developed the integrated noise analysis systems that predict and analyze all the significant noises generated from the propellers, considering the hull wake. Since each type of noise has different sources and mechanisms, it is essential to analyze all types of noise to evaluate the propeller noise perform

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12

Bolun, Chen, and Sergey Timushev. "Computational study on aeroacoustics interaction of propeller configuration." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 78 (2024): 59–74. https://doi.org/10.15593/2224-9982/2024.78.06.

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This paper describes a computational study of the aeroacoustics interaction that occurs between propellers and wings. A numerical approach is proposed, in the frequency domain, for predicting far-field propeller noise, which requires the aerodynamic sources to be integrated over the actual blade surface, rather than over the propeller disk. This numerical approach has been validated by experimental results and result of acoustic-vortex method. In this paper has presented several configurations of propeller and wing (tractor propeller, pusher propeller, propeller over the wing) and concluded th

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13

Sezen, Savas, and Sakir Bal. "A computational investigation of noise spectrum due to cavitating and non-cavitating propellers." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 234, no. 2 (2019): 374–87. http://dx.doi.org/10.1177/1475090219892368.

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In this article, noise spectrum of marine propellers is investigated in uniform flow under non-cavitating and cavitating conditions. New results are presented for this research field. Hydrodynamic performance of both non-cavitating and cavitating marine propellers is first analyzed by viscous and potential based flow solvers. In viscous solver, sheet cavitation on propeller blades is simulated with Schnerr–Sauer cavitation model based on Rayleigh Plesset equation using volume of fluid approach. Numerical hydrodynamic results based on viscous solver is compared with potential solver and then va

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14

Руденко, В. В., та В. П. Чернолихова. "АКУСТИЧНА ПОМІТНІСТЬ БЕЗПІЛОТНИХ ЛІТАЛЬНИХ АПАРАТІВ З СИЛОВОЮ УСТАНОВКОЮ, ЩО МІСТИТЬ ЕЛЕКТРОДВИГУН І ПОВІТРЯНИЙ ГВИНТ". Open Information and Computer Integrated Technologies, № 88 (6 листопада 2020): 81–94. http://dx.doi.org/10.32620/oikit.2020.88.06.

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The presence in operation of many prototypes of UAVs with propeller propellers, the use of such devices at relatively low altitudes and flight speeds makes the problem of reducing the noise generated during UAV flights urgent both from the point of view of acoustic visibility and ecology.The main source of the UAV's acoustic signature is its power plant, which includes the engine and propeller.The tasks of this work, the solution of which requires the implementation of experimental studies, include the determination of the power, spatial and spectral characteristics of the acoustic fields of p

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15

Leggat, L. J., and N. C. Sponagle. "The Study of Propeller Cavitation Noise Using Cross-Correlation Methods." Journal of Fluids Engineering 107, no. 1 (1985): 127–33. http://dx.doi.org/10.1115/1.3242430.

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This paper presents a technique for the study of the mechanisms responsible for the generation of noise from cavitating propellers. The experimental method, which involves the cross-correlation of the pressure gradient in the near-field of the propeller with the far-field sound, allows the determination of the spatial distribution of acoustic source strength on and near the cavitating propeller. The paper describes the mathematical basis for the cross-correlation technique, and then presents some of the results from experiments with propellers specifically designed to produce vortex and bubble

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16

Jiang, Hanbo, Han Wu, Wangqiao Chen, et al. "Toward high-efficiency low-noise propellers: A numerical and experimental study." Physics of Fluids 34, no. 7 (2022): 076116. http://dx.doi.org/10.1063/5.0098891.

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This work presents a high-efficiency low-noise propeller design for unmanned aerial vehicles. Three different blade configurations are first investigated, using the computational aeroacoustic approach to recognize the flow around propellers and the noise emissions. The flow simulation is obtained by an acoustic-wave preserved artificial compressibility method, and the far-field noise is extrapolated by solving the Ffowcs-Williams and Hawkings equations. Experiments are also conducted to validate numerical simulations and the design philosophy. The comparison between numerical and experimental

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17

S. V. Madhusudhana, M. Ravi Kumar, and Abhijeeth Biswas. "Aeroacoustics Analysis of Propeller Blade." ACS Journal for Science and Engineering 4, no. 1 (2024): 17–24. http://dx.doi.org/10.34293/acsjse.v4i1.102.

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Aeroacoustics analysis of propeller blades is a crucial aspect in the field of aerospace engineering, aiming to understand and mitigate the noise generated by rotating propellers. This study delves into the complex interactions between the aerodynamic forces acting on propeller blades and the resultant acoustic emissions. The analysis involves a comprehensive examination of the flow patterns, pressure fluctuations, and vortex shedding that contributes to the noise generation. Key factors influencing propeller noise include blade geometry, rotational speed, and tip Mach number. Understanding th

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18

Mousavi, B., A. Rahrovi, and S. Kheradmand. "Numerical Simulation of Tonal and Broadband Hydrodynamic Noises of Non-Cavitating Underwater Propeller." Polish Maritime Research 21, no. 3 (2014): 46–53. http://dx.doi.org/10.2478/pomr-2014-0029.

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Abstract The objective of the study was to carry out numerical simulation of the hydrodynamic noise generated by the flow around a non-cavitating underwater propeller. To achieve this goal, hydrodynamic simulation of flow around the propeller was initially done. Te unsteady 3-D flow was modelled numerically along with the LES turbulence model. Te hydrodynamic parameters calculated for different advance coefficients are visibly in line with the previous experimental works. Te turbulent quantities of the hydrodynamic study and the FWH model were used to find spectral distributions of flow noise

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19

Yu, Duo, Youbin Yu, and Suoxian Yang. "Influence of Free Surface on the Hydrodynamic and Acoustic Characteristics of a Highly Skewed Propeller." Journal of Marine Science and Engineering 12, no. 12 (2024): 2208. https://doi.org/10.3390/jmse12122208.

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The noise analysis of a large-scale aquaculture vessel reveals that during its navigation, the primary equipment noise, particularly from the propeller, exerts a notable influence on the aquaculture environment for large yellow croaker. The free surface greatly impacts the noise performance of propellers, which is a significant factor affecting the fish’s habitat. This study adopts the numerical simulation method to analyze the hydrodynamic and acoustic characteristics of the E1619 propeller operating near the free surface. The open-water performance and noise calculations of the propeller are

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20

Gautam, Abhishek, Liam Hanson, Djamel Rezgui, Bin Zang, and Mahdi Azarpeyvand. "Effect of tip Mach number on propeller noise in edgewise flight." Journal of the Acoustical Society of America 157, no. 6 (2025): 4588–603. https://doi.org/10.1121/10.0036571.

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Advanced air mobility represents efficient and sustainable transportation through the use of electric vertical takeoff and landing (eVTOL) aircraft, which will see their propellers operating in edgewise flow for a significant portion of their mission profile, giving rise to challenging aerodynamic and aeroacoustic features, different from the conventional helicopter rotors. The present experimental study examines the effect of the blade tip Mach number on the acoustic signature emitted by a propeller operating in edgewise flight conditions. Both aeroacoustic and aerodynamic measurements were p

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21

Guo, Chunyu, Xu Wang, Chongge Chen, Yinghong Li, and Jian Hu. "Numerical Investigation of Self-Propulsion Performance and Noise Level of DARPA Suboff Model." Journal of Marine Science and Engineering 11, no. 6 (2023): 1206. http://dx.doi.org/10.3390/jmse11061206.

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Propulsion noise is an enduring problem of significant military and environmental importance. Hence, it is crucial to investigate propeller noise characteristics. In this study, the hydrodynamic performance and noise level of the DARPA (Defense Advanced Research Projects Agency) Suboff submarine with the E1619 propeller were analyzed. The hull resistance and propeller hydrodynamics were studied separately, and the numerical results were validated using available experimental values. The self-propulsion point was determined by matching the hull resistance and propeller thrust following ITTC (In

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22

Fang, Bin, Min Lei, and Qi Dou Zhou. "A New Design of the High-Skew Ducted Propeller." Advanced Materials Research 516-517 (May 2012): 1048–52. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1048.

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Unmanned Underwater Vehicle (UUV), which could be used for ocean exploration and development, developed rapidly in recent years. In order to make UUV quieter to be competent for rigorous working conditions, a new propulsion with lower underwater noise must be designed. A new high-skew ducted propeller, which had the advantages of both ducted propeller and high-skew propeller, had been designed for UUV to obtain adequate thrust and lower underwater noise. CFD simulation of the high-skew ducted propeller showed that the thrust was enough for UUV working underwater and the hydrodynamic efficiency

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23

Prokopenko, Denis. "Analysis of noise sources in the cabin of a passenger aircraft and methods for combating them." E3S Web of Conferences 583 (2024): 03023. http://dx.doi.org/10.1051/e3sconf/202458303023.

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This paper examined the problem of noise in the aircraft cabin and ways to solve it. Through observations, the following causes of noise were identified: the power plant (acoustic and mechanical vibrations, turbulent boundary layer and others), the location of the engine relative to the airframe, the noise of the propeller (if it is a propeller power plant), the propeller of the power plant itself, the air conditioning system, and so on the same operating device in the cabin. There is a comprehensive way to solve the problem of noise in the aircraft cabin: for aircraft with turbojet engines, m

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24

Sokol, G. I., S. V. Aleksieienko, and D. V. Mikhalov. "ACOUSTIC FIELD CHARACTERISTICS UAV SCREW." System design and analysis of aerospace technique characteristics 31, no. 2 (2022): 81–94. http://dx.doi.org/10.15421/472216.

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Unmanned aerial vehicles (UAVs) began to be actively used in civil and military spheres. During flight, UAV nodes emit noise into the environment, while the main radiation node is its propeller. In the civilian sphere, the noise of a drone can cause noise irritation in people, and in the military sphere, by registering this noise, it is possible to determine its bearing and destroy the aircraft. The need to get rid of these harmful factors creates the need to calculate the acoustic field of the UAV propeller. The task: to analyze the noises that arise during the operation of the UAV; dra

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25

Heydari, Morteza, Hamid Sadat, and Rajneesh Singh. "A Computational Study on the Aeroacoustics of a Multi-Rotor Unmanned Aerial System." Applied Sciences 11, no. 20 (2021): 9732. http://dx.doi.org/10.3390/app11209732.

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The noise generated by a quadrotor biplane unmanned aerial system (UAS) is studied computationally for various conditions in terms of the UAS pitch angle, propellers rotating velocity (RPM), and the UAS speed to understand the physics involved in its aeroacoustics and structure-borne noise. The k-ω SST turbulence model and Ffowcs Williams-Hawkings equations are used to solve the flow and acoustics fields, respectively. The sound pressure level is measured using a circular array of microphones positioned around the UAS, as well as at specific locations on its structure. The local flow is studie

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26

Huang, Guangyuan, Ankit Sharma, Xin Chen, Atif Riaz, and Richard Jefferson-Loveday. "Numerical Predictions of Low-Reynolds-Number Propeller Aeroacoustics: Comparison of Methods at Different Fidelity Levels." Aerospace 12, no. 2 (2025): 154. https://doi.org/10.3390/aerospace12020154.

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Low-Reynolds-number propeller systems have been widely used in aeronautical applications, such as unmanned aerial vehicles (UAV) and electric propulsion systems. However, the aerodynamic sound of the propeller systems is often significant and can lead to aircraft noise problems. Therefore, effective predictions of propeller noise are important for designing aircraft, and the different phases in aircraft design require specific prediction approaches. This paper aimed to perform a comparison study on numerical methods at different fidelity levels for predicting the aerodynamic noise of low-Reyno

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27

Xiao, Chang Run, Rui Jie Liu, and Jin Ming Ye. "The Attenuation Trend of the Propeller Noise." Advanced Materials Research 774-776 (September 2013): 82–85. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.82.

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The blade frequency noise of non-cavitation propellers in an non-uniform flow is analyzed in time domain. The unsteady loading (dipole source) on the blade surface is calculated by a potential-based panel method. Through calculation and comparison, the noise attenuation trend of propeller is discussed. The noise decays more quickly in the near field than in the far field. The Attenuation Trend of the Propeller Noise

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28

Xue, Dongwen, Qun Yan, Zhuohan Li, and Kai Wei. "Multidisciplinary Optimization Design of Low-Noise Propellers." Aerospace 10, no. 3 (2023): 254. http://dx.doi.org/10.3390/aerospace10030254.

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In this paper, a multidisciplinary optimization design method and its verification of low-noise aircraft propellers considering aerodynamics, noise, and structural strength were carried out to further reduce the aerodynamic noise of the aircraft propellers. The Vortex Lattice Method-based Lift Surface Method and the Frequency-Domain-based Hanson Method were deployed to evaluate the aerodynamic performance and far-field noise of the propeller with validation by benchmark test result comparison, respectively. Integrating both of the aforementioned methods, the constraints, and a genetic algorith

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29

Zhang, Zhaowen. "Research on ship propeller noise reduction: Advanced materials and innovative geometric design." Applied and Computational Engineering 61, no. 1 (2024): 222–30. http://dx.doi.org/10.54254/2755-2721/61/20240964.

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The noise reduction technology of ship propellers is currently one of the challenging directions, despite some progress having been made, continuous research and development are still underway. This paper elucidates commonly used noise reduction methods, namely geometric structure optimization and material optimization. Geometric structure optimization involves aspects such as the number of propeller blades, disk loading ratio, skew angle, and blade shape. Material optimization encompasses material selection, surface coating optimization, and propeller duct design. Corresponding optimization m

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Zhou, Yuhan. "Noise-Reducing Ship Propeller Design." Applied and Computational Engineering 147, no. 1 (2025): 151–59. https://doi.org/10.54254/2755-2721/2025.22617.

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Propellers, as the core of ship propulsion systems, significantly impact vessel speed, fuel efficiency, and overall performance. Achieving a balance between hydrodynamic efficiency, cavitation reduction, and noise minimization remains a significant challenge in traditional propeller design. These methods often focus on optimizing individual performance parameters while neglecting the interplay between them, resulting in suboptimal outcomes. This paper introduces a novel multi-objective integrated design theory for propellers, aiming to overcome these limitations. Leveraging advanced computatio

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31

Sheng, Long, Xianghua Huang, and Yunfei Cao. "Propeller Synchrophasing Control with a Cylindrical Scaled Fuselage Based on an Improved Data Selection Algorithm." Energies 12, no. 14 (2019): 2736. http://dx.doi.org/10.3390/en12142736.

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Propeller synchrophasing control is an active noise control method which can effectively reduce the noise in the cabin of a turboprop aircraft. The propeller signature model identified by the measured acoustic noise data is easily affected by flight speed, altitude, and the existence of the fuselage. Meanwhile, the noise excited by the propellers is nonstationary signal, which often fluctuates greatly, thus affecting the accuracy of the identification of the model. In this paper, a synchrophasing control experimental platform with a cylindrical scaled fuselage on ground is firstly established

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32

Hanson, Liam, Kabilan Baskaran, Bin Zang, and Mahdi Azarpeyvand. "Acoustic Shielding and Scattering Effects of a Propeller Mounted Above a Flat Plate." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 2 (2023): 5013–24. http://dx.doi.org/10.3397/in_2022_0725.

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To reduce the overall noise pollution generated by aircraft, design choices often attempt to incorporate acoustic shielding often using aircraft wings to minimise the noise generated by engines and propellers. By mounting a propeller above a wing, increasing the noise shielding, acoustic scattering effects can be introduced which change the directivity and magnitude of the noise generated. Experiments were carried out to investigate the acoustic shielding and scattering effects of a propeller mounted above a flat plate trailing edge. Two propellers were tested at constant rotational rates of 5

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Sura, Sreekanth, B. Nagaraj Goud, Raju Santhani, Sathwik, and Manideep. "3-Blade Propeller Design and Acoustical Analysis." Journal of Physics: Conference Series 2837, no. 1 (2024): 012093. http://dx.doi.org/10.1088/1742-6596/2837/1/012093.

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Abstract In the recent time, the deployment and usage of small scale unmanned aerial vehicles (UAVs) have grown rapidly for a wide range of civilian and military applications. These applications range from racing, delivery and photography for civilians to land based reconnaissance operations for military purposes. The noise produced by the propellers is one of the major factors which are stopping its application in delivery of goods. As a lot of drones around the houses making annoying noises will lead to the frustration and stress to local residents. Even in the application of drone in milita

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Kopyev, V. F., N. N. Ostrikov, G. A. Faranosov, V. A. Titarev, S. L. Denisov, and R. V. Akinshin. "On the Mechanism of Lateral Asymmetry of Noise Emission from a Propeller Installed Near a Wing." Akustičeskij žurnal 70, no. 5 (2024): 692–709. https://doi.org/10.31857/s0320791924050053.

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The effect of lateral asymmetry in the radiation pattern of a propeller installed near the wing is studied. Within the framework of a simplified theoretical model of the propeller loading noise and its shielding by a half-plane, as well as using numerical modeling of the interaction of the propeller with a flat finite plate, it is shown that when the propeller and the scattering surface are close to each other, a significant lateral asymmetry of the propeller tonal noise emission in the far field appears. The mechanism of this effect, which accompanies the symmetrical sound directivity of the

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35

Purwana, Agung, I. Made Ariana, and Wisnu Wardhana. "Numerical study on the cavitation noise of marine skew propellers." Journal of Naval Architecture and Marine Engineering 18, no. 2 (2021): 97–107. http://dx.doi.org/10.3329/jname.v18i2.38099.

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In this study, numerical simulations on the noise of the underwater marine propeller for different pressures, skew angles, and performance conditions are investigated. The study has been carried out for the prediction of cavity and noise cavitation characteristics of the propeller. The blade sheet cavitation created by an underwater propeller is then evaluated using numerical analysis. The cavitation and cavity around marine propellers were predicted using MRF (Multiple Reference Frame) techniques. The simulation uses the Reynolds Averaged Navier-Stokes (RANS) formulation with the turbulence m

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Koval, A., A. Maslova, and N. Marinich. "Propeller design with pre-swirl stators." Transactions of the Krylov State Research Centre 1, no. 399 (2022): 95–101. http://dx.doi.org/10.24937/2542-2324-2022-1-399-95-101.

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Object and purpose of research. This research was intended to check if a pre-swirl stator installed before an open propeller of moderate skew could be a viable solution for non-cavitation hydrodynamic noise mitigation. This solution was compared with a typical open skewed silent propeller. Materials and methods. Design and verification calculations have been performed in a given wake field of pre-swirl stator. Pre-swirl stator was designed considering the wake field turn at the skew angles of typical propeller. Wake field behind the pre-swirl stator and design calculation of open propeller con

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Aktas, Batuhan, Naz Yilmaz, Mehmet Atlar, Noriyuki Sasaki, Patrick Fitzsimmons, and David Taylor. "Suppression of Tip Vortex Cavitation Noise of Propellers using PressurePoresTM Technology." Journal of Marine Science and Engineering 8, no. 3 (2020): 158. http://dx.doi.org/10.3390/jmse8030158.

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This study aims to demonstrate the merits of pressure-relieving holes at the tip region of propellers, which is introduced as “PressurePoresTM” technology as a retrofit on marine propellers to mitigate tip vortex cavitation noise for a quieter propeller. Shipping noise originates from various sources on board a vessel, amongst which the propeller cavitation is considered to dominate the overall radiated noise spectrum above the inception threshold. Thus, by strategically introducing pressure-relieving holes to modify the presence of cavitation, a reduction in the overall cavitation volume can

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Kovtun, Artem, Andrii Melchenko, Kateryna Balalaieva та Vyacheslav Usenko. "Акустичне випромінювання закапотованого гвинта БПЛА". Aerospace Technic and Technology, № 4 (29 серпня 2024): 58–63. http://dx.doi.org/10.32620/aktt.2024.4.07.

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The subject of this study was the acoustic radiation of the ducted propeller of an unmanned aerial vehicle. The object of this study was the ducted propeller of a quadcopter. The peripheral diameter of the propeller was 128 mm, and the thickness of the duct was 2 mm. The propeller rotates with the duct. The purpose of this work was to assess the influence of the duct on the acoustic radiation of the propeller of an unmanned aerial vehicle. The following tasks were set and solved in this work: a comparison of the sound pressure level values of the open and ducted propeller of an unmanned aerial

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Kimmerl, Julian, Paul Mertes, and Moustafa Abdel-Maksoud. "Application of Large Eddy Simulation to Predict Underwater Noise of Marine Propulsors. Part 2: Noise Generation." Journal of Marine Science and Engineering 9, no. 7 (2021): 778. http://dx.doi.org/10.3390/jmse9070778.

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Methods to predict underwater acoustics are gaining increased significance, as the propulsion industry is required to confirm noise spectrum limits, for instance in compliance with classification society rules. Propeller–ship interaction is a main contributing factor to the underwater noise emissions by a vessel, demanding improved methods for both hydrodynamic and high-quality noise prediction. Implicit large eddy simulation applying volume-of-fluid phase modeling with the Schnerr-Sauer cavitation model is confirmed to be a capable tool for propeller cavitation simulation in part 1. In this p

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Simon, Frank, Noah H. Schiller, Nicole Pettingill, Nicolas Zawodny, and Matt Galles. "Measurement of airborne sound insulation of building components by near-field acoustic holography." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 7 (2023): 657–67. http://dx.doi.org/10.3397/in_2022_0091.

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Unmanned aerial vehicles (UAVs) are currently being used for reconnaissance missions, tactical surveillance, and infrastructure inspection. When legislation allows it, these devices will provide additional services close to inhabited areas, which could lead to noise complaints. On most UAVs, the propellers are the dominant source of noise. As a result, researchers have studied the impact of propeller shape and blade count on noise. Much of this work, however, has focused on isolated propellers. While different UAV concepts are equipped with ducts for aerodynamic and protection reasons, few stu

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Russo, Nicola, Aniello Daniele Marano, Giuseppe Maurizio Gagliardi, Michele Guida, Tiziano Polito, and Francesco Marulo. "Thrust and Noise Experimental Assessment on Counter-Rotating Coaxial Rotors." Aerospace 10, no. 6 (2023): 535. http://dx.doi.org/10.3390/aerospace10060535.

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Multirotors are gaining great importance in the layout of innovative and more agile mobility. In this framework, a possible solution to developing an aircraft complying with the stringent size requirements characterizing this type of application may be a coaxial rotor configuration. To exploit several possibilities linked to coaxial rotors, a scaled experimental model is designed to evaluate the performances of the counter-rotating propeller system, specifically regarding the distance between the two propellers. Both thrust and noise are considered as parameters of interest. Two brushless moto

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Satyavarma, K. L., and C. Neelima Devi. "Prediction of Non-Cavitating Marine Propeller Noise." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 23, no. 1 (2015): 1–6. https://doi.org/10.36842/jomase.v23i1.438.

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Noise reduction and control is an important problem in the performance of underwater acoustic systems. As the propeller rotates, it is subjected to unsteady force, which leads to discrete tonal noise, and cavitation. Therefore, underwater propeller noise can be classified into cavitating and non-cavitating noise Furthermore, sound generated by a propeller is critical in underwater detection and it is often related to the survivability of the vessel. This paper presents a numerical study on noises of the underwater propeller for different performance conditions. The non-Cavitating noise generat

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Filippone, A., and Z. Mohamed-Kassim. "Multi-disciplinary simulation of propeller-turboprop aircraft flight." Aeronautical Journal 116, no. 1184 (2012): 985–1014. http://dx.doi.org/10.1017/s0001924000007454.

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Abstract This contribution presents a novel simulation for a fixed-wing aircraft powered by gas turbine engines and advanced propellers (turboprops). The work is part of a large framework for the simulation of aircraft flight through a multi-disciplinary approach. Novel numerical methods are presented for flight mechanics, turboprop engine simulation (in direct and inverse mode), and propeller dynamics. We present in detail the integration of the propeller with the airframe, aircraft and tonal noise model. At the basic level, we address a shortfall in multi-disciplinary integration in turbopro

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Chen, Mingtai, Jacob Wimsatt, Tianming Liu, and Tiegang Fang. "Experimental and Numerical Study of a UAV Propeller Printed in Clear Resin." Aerospace 12, no. 5 (2025): 362. https://doi.org/10.3390/aerospace12050362.

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This paper presents an experimental and numerical investigation of a 254 mm resin-printed propeller operating at rotational speeds between 3000 and 9000 RPM. Propeller thrust and torque were measured using a six-degree-of-freedom load cell, while acoustic data were captured with a microphone positioned three times the propeller diameter from the center. To complement the experimental analysis, computational simulations were conducted using ANSYS Fluent with the detached eddy simulation (DES) model, the Ffowcs-Williams and Hawkings (FW-H) model, and a transient flow solver. The figure of merit

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Arystanbekov, Chingiz, Altay Zhakatayev, and Basman Elhadidi. "Passive Rotor Noise Reduction Through Axial and Angular Blade Spacing Modulation." Aerospace 12, no. 3 (2025): 167. https://doi.org/10.3390/aerospace12030167.

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This study investigates the aerodynamic and aeroacoustic performance of a novel two-stage two-bladed coaxial propeller that is axially and angularly spaced. Aerodynamic propulsive thrust and efficiency are validated and evaluated using a Reynolds-averaged Navier–Stokes computational fluid dynamics (CFD) model for the two-bladed APC27x13 propeller. Aeroacoustic assessment is conducted using a Ffowcs Williams–Hawkings integral model. A four-bladed coplanar APC27x13 propeller is simulated and considered as the baseline propeller. The CFD results suggest that changes in the rotor thrust for the co

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Pustoshny, A., and A. Koval. "Methods for predicting the noise of transport vessels propellers." Transactions of the Krylov State Research Centre 2, no. 396 (2021): 13–36. http://dx.doi.org/10.24937/2542-2324-2021-2-396-13-36.

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Object and purpose of research. The object of the research is the cavitation noise of transport vessels propellers. The purpose is to analyze and generalize modern research and methods for predicting broadband noise induced by the operation of the transport vessels cavitating propellers. Materials and methods. A review of the research materials (published in the XXI century) on the cavitation noise of transport vessels propellers, in particular broadband noise, as well as the author's own research on the causes and physical aspects of the occurrence of broadband noise is carried out. Based on

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PETRIS, Giovanni, Marta CIANFERRA, and Vincenzo ARMENIO. "Acoustic pattern of a full scale simplified ship." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 7 (2024): 4632–40. http://dx.doi.org/10.3397/in_2024_3489.

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Underwater radiated noise from ship propellers is one of the major contributors to the increase in overall noise levels in marine environments. The development of numerical tools for the computation of noise propagation is of paramount importance for the assessment of the noise impact on the environment. Hybrid approaches, based on the decoupling of the computation of the fluid flow and the successive evolution of the noise using an acoustic analogy, are typically conducted in open-water conditions, which do not correspond to a realistic environment. The Full Acoustic Analogy, which couples a

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IJRAME, Journal. "Enhanced Thrust Performance of Quadcopter Toroidal Propellers: A Computational Fluid Dynamics Analysis." International Journal of Research in Aeronautical and Mechanical Engineering 12, no. 12 (2024): 36–46. https://doi.org/10.5281/zenodo.14571188.

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Quadcopters rely on propeller thrust to maintain flight stability and payload capacity. Conventional propellers exhibit several limitations, including high noise levels, suboptimal thrust efficiency, and restricted payload capabilities. These drawbacks have spurred interest in exploring alternative propeller designs to improve drone performance. This study focuses on the design, analysis, and evaluation of toroidal propellers, a novel geometry characterized by interconnected looped blades, to address these challenges. Using a comprehensive computational approach, a 3D CAD model of the toroidal

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Iemma, Umberto, Caterina Poggi, Monica Rossetti, and Giovanni Bernardini. "Techniques for adaptive metamodelling of propeller arrays far-field noise." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 4 (2021): 2674–86. http://dx.doi.org/10.3397/in-2021-2203.

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The fast development of Urban-Air-Mobility as well as the constant growth of the air transport have made the acoustic pollution abatement a crucial requirement for the aviation industries in order to comply with the increasingly demanding constraints for the community acceptance. The aeroacoustic characterization of arrays of electrically-powered propellers is one of the most challenging issues. The vast majority of the UAM concepts under development adopt propulsion systems based on multiple propellers, for which reliable and cost-efficient aeroacoustic models are still lacking. The present p

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ZHOU, Q., J. XIE, B. FANG, and Y. PAN. "PARAMETRIC STUDY OF PROPELLER TONE NOISE DUE TO NONUNIFORM FLOWS." Journal of Computational Acoustics 21, no. 03 (2013): 1350005. http://dx.doi.org/10.1142/s0218396x13500057.

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This paper investigates the tone noise generation by submarine propellers operating in nonuniform flows. A frequency domain numerical approach is proposed. The flow nonuniformities due to submarine wakes are obtained from Computational Fluid Dynamics method. The results show that the velocity field and its harmonics depend greatly on the hull geometry and its appendages. The prediction of the radiated far-field tone noise due to a seven-bladed, highly-skewed propeller has been performed. A prediction of the acoustic pressure level for various blade skew angles shows that the tone noise reducti

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