Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data: Sixteenth International Conference on Flow Dynamics

Mohammad Koshuriyan

Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data: Sixteenth International Conference on Flow Dynamics

Mathematics

Research output: Contribution to conference › Paper › peer-review

Abstract

We show the effect of correcting the acoustic spectrum formula for a high speed jet interacting with a trailing edge of a semi-infinite flat plate derived by Goldstein et al., (2017, J Fluid Mech. vol. 824, p. 477) using the Rapid-distortion theory (RDT). The correction involves using the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. The high frequency roll-off of the acoustic spectrum predictions that we obtain using this correction are closer to experiment for low speed jets. In the talk we will discuss the role of using CFD data in the model.

Original language	English
Publication status	Published - 7 Nov 2019
Event	Sixteenth International Conference on Flow Dynamics - Sendai, Japan Duration: 6 Nov 2019 → 8 Nov 2019 http://www.ifs.tohoku.ac.jp/icfd2019/

Conference

Conference	Sixteenth International Conference on Flow Dynamics
Abbreviated title	ICFD-16
Country/Territory	Japan
City	Sendai
Period	6/11/19 → 8/11/19
Internet address	http://www.ifs.tohoku.ac.jp/icfd2019/

Bibliographical note

Conference code: 16th

Keywords

rapid-distortion theory
low speed jets
turbulence

Access to Document

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Submitted manuscript, 4.78 MB

http://www.ifs.tohoku.ac.jp/icfd2019/

Cite this

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title = "Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data: Sixteenth International Conference on Flow Dynamics",

abstract = "We show the effect of correcting the acoustic spectrum formula for a high speed jet interacting with a trailing edge of a semi-infinite flat plate derived by Goldstein et al., (2017, J Fluid Mech. vol. 824, p. 477) using the Rapid-distortion theory (RDT). The correction involves using the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. The high frequency roll-off of the acoustic spectrum predictions that we obtain using this correction are closer to experiment for low speed jets. In the talk we will discuss the role of using CFD data in the model.",

keywords = "rapid-distortion theory, low speed jets, turbulence",

author = "Mohammad Koshuriyan",

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year = "2019",

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T2 - Sixteenth International Conference on Flow Dynamics

AU - Koshuriyan, Mohammad

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PY - 2019/11/7

Y1 - 2019/11/7

N2 - We show the effect of correcting the acoustic spectrum formula for a high speed jet interacting with a trailing edge of a semi-infinite flat plate derived by Goldstein et al., (2017, J Fluid Mech. vol. 824, p. 477) using the Rapid-distortion theory (RDT). The correction involves using the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. The high frequency roll-off of the acoustic spectrum predictions that we obtain using this correction are closer to experiment for low speed jets. In the talk we will discuss the role of using CFD data in the model.

AB - We show the effect of correcting the acoustic spectrum formula for a high speed jet interacting with a trailing edge of a semi-infinite flat plate derived by Goldstein et al., (2017, J Fluid Mech. vol. 824, p. 477) using the Rapid-distortion theory (RDT). The correction involves using the next order term for the amplitude function in the WKBJ approximation for the scattered pressure. The high frequency roll-off of the acoustic spectrum predictions that we obtain using this correction are closer to experiment for low speed jets. In the talk we will discuss the role of using CFD data in the model.

KW - rapid-distortion theory

KW - low speed jets

KW - turbulence

M3 - Paper

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