Aeroacoustic simulations in thermally non-homogeneous fluid flows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F25%3A00637095" target="_blank" >RIV/67985840:_____/25:00637095 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/25:00381157

Result on the web

<a href="http://dx.doi.org/10.14311/TPFM.2025.005" target="_blank" >http://dx.doi.org/10.14311/TPFM.2025.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/TPFM.2025.005" target="_blank" >10.14311/TPFM.2025.005</a>

Result language

angličtina

Original language name

Aeroacoustic simulations in thermally non-homogeneous fluid flows

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10101 - Pure mathematics

Project

<a href="/en/project/GA22-01591S" target="_blank" >GA22-01591S: Mathematical theory and numerical analysis for equations of viscous newtonian compressible fluids</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Topical Problems of Fluid Mechanics 2025

ISBN

978-80-87012-05-5

ISSN

2336-5781

e-ISSN

—

Number of pages

8

Pages from-to

31-38

Publisher name

Ústav termomechaniky AV ČR v. v. i.

Place of publication

Prague

Event location

Praha

Event date

Feb 12, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001597458700005