Low-Amplitude Acoustic Modulation as a Tool for Controlling the Vortex Structures of the Turbulent Axisymmetric Air Jet

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00638854" target="_blank" >RIV/67985858:_____/25:00638854 - isvavai.cz</a>

Result on the web

<a href="https://www.cmff.hu/papers25/CMFF25_Conference_Proceedings.pdf" target="_blank" >https://www.cmff.hu/papers25/CMFF25_Conference_Proceedings.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Low-Amplitude Acoustic Modulation as a Tool for Controlling the Vortex Structures of the Turbulent Axisymmetric Air Jet

Original language description

The roll-up of vortex structures in turbulent jets can be influenced by low-amplitude modulations of the nozzle exit velocity. These modulations can be generated either by external low-amplitude oscillations or by self-sustaining oscillations inherent to the operation of specially designed nwhistler nozzles. The aim of the experimental investigations, mathematical modeling, and numerical simulations carried out as part of the nproject evaluation was to thoroughly investigate the characteristics and vortex dynamics of acoustically modulated and non-modulated nozzles. A major focus was on identifying effective methods to control vortex structures, as these play an important role in improving heat transfer processes. This paper presents the results of mathematical modeling and numerical simulations of free and impinging turbulent axisymmetric air jets, both unmodulated and modified by low-amplitude oscillations. The modeling results showed strong agreement with experimental findings confirming the ability to manipulate vortex structures in the jet by acoustically modulating the nozzle exit velocity. This study provides a basis for the development and optimization of technological processes using air jets, particularly in applications where improved heat ntransfer is critical.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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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

Confeence Proceedings

ISBN

978-615-112-002-6

ISSN

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e-ISSN

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Number of pages

11

Pages from-to

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Publisher name

Budapest University of Technology and Economics

Place of publication

Budapest

Event location

Budapest

Event date

Aug 26, 2025

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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