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Original title:
Aeroacoustic simulations in thermally non-homogeneous fluid flows
Authors: Caggio, Matteo ; Schmid, Michal ; Valášek, Jan ; Nečasová, Šárka ; Bodnár, Tomáš ; Starynskyi, O.
Document type: Papers
Conference/Event: Conference on Topical Problems of Fluid Mechanics 2025, Praha (CZ), 20250212
Year: 2025
Language: eng
Abstract: The cooling system, comprising heat exchangers and cooling fans, is essential for maintaining the power performance and acceptable operational conditions of a vehicle. However, running of the cooling fan produces unwanted noise, which often becomes dominant sound produced by the vehicle. To model the noise generated by turbulent flow and heat transfer around cooling fan blades, an appropriate flow model is essential. This study employs the compressible Navier-Stokes equations with an restricted relation between temperature and density for efficient handling of non-homogeneous temperature fields, combined with Delayed Detached Eddy Simulation (DDES) for advanced turbulence modeling. For the aeroacoustic analysis, a hybrid aeroacoustic approach is adopted, utilizing the Acoustic Perturbation Equation (APE) to model acoustic generation and propagation. The main aim of this study is to model the flow and the acoustic problem in the consistent way for the considered simple test case of heated cylinder walls in cross-flow. As most prior investigations focused only on isothermal conditions the model considered in this study presents an important generalization. A part of the problem is to select an efficient numerical software capable to treat temperature non-homogeneities in the flow and the aeroacoustic solver while being prepared for a possible future industrial application. The obtained results for varying thermal conditions show the significant sensitivity of produced sound pressure levels.
Keywords: computational aero-acoustics; computational fluid dynamics; heat transfer; turbulent flows
Project no.: AP2101, GA22-01591S (CEP), StrategieAV21/1
Funding provider: AV ČR, GA ČR, AV ČR
Host item entry: Topical Problems of Fluid Mechanics 2025, ISBN 978-80-87012-05-5, ISSN 2336-5781
Note: Související webová stránka: https://doi.org/10.14311/TPFM.2025.005
Institution: Institute of Mathematics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0368009
Permalink: http://www.nusl.cz/ntk/nusl-684967
The record appears in these collections:
Research > Institutes ASCR > Institute of Mathematics
Conference materials > Papers
Authors: Caggio, Matteo ; Schmid, Michal ; Valášek, Jan ; Nečasová, Šárka ; Bodnár, Tomáš ; Starynskyi, O.
Document type: Papers
Conference/Event: Conference on Topical Problems of Fluid Mechanics 2025, Praha (CZ), 20250212
Year: 2025
Language: eng
Abstract: The cooling system, comprising heat exchangers and cooling fans, is essential for maintaining the power performance and acceptable operational conditions of a vehicle. However, running of the cooling fan produces unwanted noise, which often becomes dominant sound produced by the vehicle. To model the noise generated by turbulent flow and heat transfer around cooling fan blades, an appropriate flow model is essential. This study employs the compressible Navier-Stokes equations with an restricted relation between temperature and density for efficient handling of non-homogeneous temperature fields, combined with Delayed Detached Eddy Simulation (DDES) for advanced turbulence modeling. For the aeroacoustic analysis, a hybrid aeroacoustic approach is adopted, utilizing the Acoustic Perturbation Equation (APE) to model acoustic generation and propagation. The main aim of this study is to model the flow and the acoustic problem in the consistent way for the considered simple test case of heated cylinder walls in cross-flow. As most prior investigations focused only on isothermal conditions the model considered in this study presents an important generalization. A part of the problem is to select an efficient numerical software capable to treat temperature non-homogeneities in the flow and the aeroacoustic solver while being prepared for a possible future industrial application. The obtained results for varying thermal conditions show the significant sensitivity of produced sound pressure levels.
Keywords: computational aero-acoustics; computational fluid dynamics; heat transfer; turbulent flows
Project no.: AP2101, GA22-01591S (CEP), StrategieAV21/1
Funding provider: AV ČR, GA ČR, AV ČR
Host item entry: Topical Problems of Fluid Mechanics 2025, ISBN 978-80-87012-05-5, ISSN 2336-5781
Note: Související webová stránka: https://doi.org/10.14311/TPFM.2025.005
Institution: Institute of Mathematics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0368009
Permalink: http://www.nusl.cz/ntk/nusl-684967
The record appears in these collections:
Research > Institutes ASCR > Institute of Mathematics
Conference materials > Papers
Record created 2025-07-05, last modified 2025-07-05