Abstract
In this study, 3D flow over backward-facing step is solved for low Mach number. Large Eddy Simulation is used to resolve turbulent features into the flow field. Numerical results of turbulent flow field are compared with experimental velocity profiles for different stations and those are validated. Additional to accounting a flow field, sound levels for different located receivers due to backward-facing step flow are determined using Acoustic Analogy (AA) which is firstly proposed by Lighthill. Unsteady flow field variables obtained from computational fluid dynamics commercial code is used as input in Ffowcs Williams-Hawkings (FW-H) Equation, which is an extended version of Lighthill equation. Additionally, some active flow control methodologies are carried out to a flow field to understand better relations between flow controls and acoustic results. These flow control techniques are the suction and blowing with different magnitudes at the bottom of backward-facing step. The controlled cases are also compared with experimental flow field results and validated. Acoustic results are plotted in frequency and time domain. Different active control effects on acoustic results are evaluated and interpreted.
Original language | English |
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Title of host publication | Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings |
Editors | Osvaldo Gervasi, Beniamino Murgante, Sanjay Misra, Chiara Garau, Ivan Blecic, David Taniar, Bernady O. Apduhan, Ana Maria A.C. Rocha, Eufemia Tarantino, Carmelo Maria Torre, Yeliz Karaca |
Publisher | Springer Science and Business Media Deutschland GmbH |
Pages | 503-517 |
Number of pages | 15 |
ISBN (Print) | 9783030588014 |
DOIs | |
Publication status | Published - 2020 |
Event | 20th International Conference on Computational Science and Its Applications, ICCSA 2020 - Cagliari, Italy Duration: 1 Jul 2020 → 4 Jul 2020 |
Publication series
Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 12250 LNCS |
ISSN (Print) | 0302-9743 |
ISSN (Electronic) | 1611-3349 |
Conference
Conference | 20th International Conference on Computational Science and Its Applications, ICCSA 2020 |
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Country/Territory | Italy |
City | Cagliari |
Period | 1/07/20 → 4/07/20 |
Bibliographical note
Publisher Copyright:© 2020, Springer Nature Switzerland AG.
Keywords
- Acoustic analogy
- Backward-facing step flow
- Flow control
- Large eddy simulation
- Low mach number