Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation

Kamil Furkan Taner; Furkan Cosgun; Baha Zafer

doi:10.1007/978-3-030-58802-1_36

Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation

Kamil Furkan Taner^*, Furkan Cosgun, Baha Zafer

^*Corresponding author for this work

Department of Aeronautical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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
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	https://doi.org/10.1007/978-3-030-58802-1_36
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)
Volume	12250 LNCS
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	20th International Conference on Computational Science and Its Applications, ICCSA 2020
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

Access to Document

10.1007/978-3-030-58802-1_36

Cite this

Taner, K. F., Cosgun, F., & Zafer, B. (2020). Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation. In O. Gervasi, B. Murgante, S. Misra, C. Garau, I. Blecic, D. Taniar, B. O. Apduhan, A. M. A. C. Rocha, E. Tarantino, C. M. Torre, & Y. Karaca (Eds.), Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings (pp. 503-517). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 12250 LNCS). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-030-58802-1_36

Taner, Kamil Furkan ; Cosgun, Furkan ; Zafer, Baha. / Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation. Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings. editor / 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. Springer Science and Business Media Deutschland GmbH, 2020. pp. 503-517 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

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title = "Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation",

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.",

keywords = "Acoustic analogy, Backward-facing step flow, Flow control, Large eddy simulation, Low mach number",

author = "Taner, {Kamil Furkan} and Furkan Cosgun and Baha Zafer",

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doi = "10.1007/978-3-030-58802-1_36",

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editor = "Osvaldo Gervasi and Beniamino Murgante and Sanjay Misra and Chiara Garau and Ivan Blecic and David Taniar and Apduhan, {Bernady O.} and Rocha, {Ana Maria A.C.} and Eufemia Tarantino and Torre, {Carmelo Maria} and Yeliz Karaca",

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Taner, KF, Cosgun, F & Zafer, B 2020, Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation. in O Gervasi, B Murgante, S Misra, C Garau, I Blecic, D Taniar, BO Apduhan, AMAC Rocha, E Tarantino, CM Torre & Y Karaca (eds), Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 12250 LNCS, Springer Science and Business Media Deutschland GmbH, pp. 503-517, 20th International Conference on Computational Science and Its Applications, ICCSA 2020, Cagliari, Italy, 1/07/20. https://doi.org/10.1007/978-3-030-58802-1_36

Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation. / Taner, Kamil Furkan; Cosgun, Furkan; Zafer, Baha.
Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings. ed. / 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. Springer Science and Business Media Deutschland GmbH, 2020. p. 503-517 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 12250 LNCS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - 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.

AB - 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.

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Taner KF, Cosgun F, Zafer B. Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation. In Gervasi O, Murgante B, Misra S, Garau C, Blecic I, Taniar D, Apduhan BO, Rocha AMAC, Tarantino E, Torre CM, Karaca Y, editors, Computational Science and Its Applications – ICCSA 2020 - 20th International Conference, Proceedings. Springer Science and Business Media Deutschland GmbH. 2020. p. 503-517. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)). doi: 10.1007/978-3-030-58802-1_36

Aeroacoustics Investigation of an Uncontrolled and a Controlled Backward-Facing Step with Large Eddy Simulation

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