Over the past decades, one of the main research areas of the Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Fluid Mechanics has been acoustics. The Acoustics Research Group brings together members of the Department of Fluid Mechanics working in this area. Our research goal is to design more efficient and quieter fluid machinery (or even complex fluid systems) and to further develop methods to facilitate this. The narrower research areas of the members of the group range from basic research on flow and acoustic phenomena in fluid systems to applied research in industrial fluid systems. In the course of the research, the infrastructure of the Theodore von Kármán Wind Tunnel Laboratory of the Department of Fluid Mechanics (wind tunnels; hotwire anemometry (CTA), Laser Doppler anemometry (LDA), and particle image velocimetry (PIV) measurement techniques; multichannel pressure, force, and torque measurement systems; acoustic measurements; vibration diagnostics; phased array microphone systems; and flow visualization) is utilized, and in addition we also rely on computational fluid dynamics (CFD) and computational aeroacoustics (CAA) simulation techniques. In the course of our work, we consider it important to support the industry. Therefore, in addition to basic research grants, we also cooperate with a number of industrial partners from the private sector. Other than research, we also focus on nurturing talented engineering students and therefore constantly strive to involve students interested in fluid mechanics and acoustics in our research projects.
Acoustics Research Group
Research keywords:
· fluid mechanics
· fluid machinery
· fluid systems
· turbomachinery
· aerodynamics
· aeroacoustics
· computational fluid dynamics (CFD)
· computational aeroacoustics (CAA)
· beamforming
Horizon Europe keywords:
· Cities and communities
· Clean and healthy air, water and soil
· Clean, sustainable, secure and competitive energy supply
· Climate change mitigation and adaptation
· Energy efficient buildings
· Renewable energy
· Smart and sustainable transport and mobility
· European Green Deal
Introduction of the Research Group
Watch our 3-minute introductory video:
Achievements
- Design of multiple axial flow fan families for a wide range of industrial applications which can be characterized as being highly efficient and quiet- Providing the industry with key blade stacking design guidelines (eg sweep, dihedral, and skew)
- Explanation of the 3D flow field of turbomachinery designed using controlled vortex design methods.
- Providing the industry with design guidelines for highly efficient and quiet turbomachinery
- Development of design guidelines for quiet turbomachinery
- Extension of semi-empirical noise generation models for real axial flow fan geometry
- Explanation of noise emission reduction effect of bellmouth inlets of axial flow fans
- Development of multiple noise source localization methods for turbomachinery applications
- Providing a deeper understanding of the beamforming results of turbomachinery applications
- Explanation of turbomachinery noise sources
Publications
Kocsis, Balint; Horvath, Csaba, Further development of rotating beamforming techniques using asynchronous measurements, Journal of Theoretical and Computational Acoustics 32 : 1 Paper: 2340006 , 25 p. (2024). https://doi.org/10.1142/S2591728523400066
Lendvai, Bálint; Benedek, Tamás, Phased array microphone measurement of a ducted low-speed axial flow fan at various operating points with the involvement of the acoustically transparent duct technique, INTERNATIONAL JOURNAL OF AEROACOUSTICS 22 : 7-8 pp. 625-638. , 14 p. (2023) https://doi.org/10.1177/1475472X231206494
Lendvai, Bálint; Benedek, Tamás, Experimental and numerical investigation of the blade tip-related aeroacoustic sound source mechanisms of a ducted low-speed axial flow fan, APPLIED ACOUSTICS 215 Paper: 109705 , 14 p. (2023) https://doi.org/10.1016/j.apacoust.2023.109705
Lendvai, Bálint ; Benedek, Tamás ; Balla, Esztella, Aeroacoustic investigation of airfoil profiles in turbulence at moderate Reynolds numbers involving the phased array microphone technique and the ANOVA statistical method, FLUCTUATION AND NOISE LETTERS 22 : 3 Paper: 2350032 , 13 p. (2023) https://doi.org/10.1142/S0219477523500323
Benedek, Tamás; Vad, János; Lendvai, Bálint, Combined acoustic and aerodynamic investigation of the effect of inlet geometry on tip leakage flow noise of free-inlet free-exhaust low-speed axial flow fans, APPLIED ACOUSTICS 187 Paper: 108488 , 15 p. (2022) https://doi.org/10.1016/j.apacoust.2021.108488
Fenyvesi, Bence; Kriegseis, Jochen; Horváth, Csaba, An automated method for the identification of interaction tone noise sources on the beamforming maps of counter-rotating rotors, PHYSICS OF FLUIDS 34 : 4 pp. 047105-047105-16. , 17 p. (2022) https://doi.org/10.1063/5.0083634
Zhang, Haitian; Kocsis, Bálint; Horváth, Csaba, Segmented ROSI method: Beamforming method for investigating turbomachinery noise sources along segmented trajectories, NOISE CONTROL ENGINEERING JOURNAL 70 : 1 pp. 62-76. , 15 p. (2022) https://doi.org/10.3397/1/37705
Journals
AIAA Journal; Applied Acoustics; Fluctuation and Noise Letters; International Journal of Aeroacoustics; International Journal of Turbomachinery, Propulsion, and Power; Journal of Sound and Vibration; Journal of Turbomachinery; Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and EnergyInfrastructure
Wind tunnels, Hotwire anemometry (CTA), Laser Doppler Anemometry (LDA), Particle Image Velocimetry (PIV), Multi-channel pressure, force, and torque measurements, Acoustic measurements, Vibration measurements, Phased array microphone systems, Flow visualization, Computational Fluid Dynamics (CFD), Computational AeroAcoustics (CAA), In-house simulation tool developmentProjects
- Further development of a phased array microphone-based diagnostics method for aiding in the loss and noise reduction of axial flow industrial fans, 2014-2018, principal investigator, grant, National Research, Development and Innovation Office
- Aeroacoustic and aerodynamic investigation of counter-rotating open rotors, utilizing beamforming methods, 2016-2019, principal investigator, grant, National Research, Development and Innovation Office
- Elaboration of new methods for noise mapping of ducted axial fans, 2018-2022, principal investigator, grant, National Research, Development and Innovation Office
- Concerted acoustic and aerodynamic analysis on unmanned aerial vehicles for establishing new guidelines on noise reduction, 2022-2026, principal investigator, grant, National Research, Development and Innovation Office
Industry relations
AVLKnorr-Bremse
Audi
Flowserve
Grundfos
Hungaro-Ventilator
MOL
Rolls Royce
Siemens
Conferences
ASME Turbo Expo, 24-28 June 2024, Balla, Esztella; Kovács, Kinga Andrea; Lendvai, Bálint; Vad, János; Daku, Gábor, participants
10th Berlin Beamforming Conference (BeBeC), Berlin, Germany, 10-11 June 2024, Horváth, Csaba; Kocsis, Bálint; Tokaji, Kristóf; Istók, Balázs participants
30th AIAA/CEAS Aeroacoustics Conference (2024), Rome, Italy, 4-7 June, 2024, Horváth, Csaba; Tokaji, Kristóf participants
15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023, Budapest, Hungary, 24-28 April, 2023, Vad, János; Horváth, Csaba; Balla, Esztella Éva organizers
15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023, Budapest, Hungary, 24-28 April, 2023, Vad, János; Horváth, Csaba; Balla, Esztella Éva; Kocsis, Bálint; Benedek, Tamás; Daku, Gábor; Lendvai, Bálint participants
Conference on Modeling Fluid Flow, Budapest, Hungary, 30 August - 2 September 2022, János Vad, Chairman of the local organizing committee, Csaba Horváth, Secretary of the scientific committee, Estzella Balla, Secretariat
Conference on Modeling Fluid Flow, Budapest, Hungary, 30 August - 2 September 2022, Vad, János; Horváth, Csaba; Balla, Esztella Éva; Kocsis, Bálint; Daku, Gábor; Tokaji, Kristóf participants
ASME Turbo Expo, Online, 13-17 June 2022, János Vad, Gábor Daku, participants