Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data

Research output: Contribution to conferenceOther

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 languageEnglish
Number of pages2
Publication statusPublished - 7 Nov 2019
EventSixteenth International Conference on Flow Dynamics - Tohoku University , Sendai, Japan
Duration: 6 Nov 20198 Nov 2019
Conference number: 16th
http://www.ifs.tohoku.ac.jp/

Conference

ConferenceSixteenth International Conference on Flow Dynamics
Abbreviated titleICFD-2019
CountryJapan
CitySendai
Period6/11/198/11/19
Internet address

Fingerprint

Computational fluid dynamics
Acoustics
Fluids
Experiments

Keywords

  • rapid-distortion theory
  • low speed jets
  • turbulence

Cite this

Afsar, M. (2019). Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data. Sixteenth International Conference on Flow Dynamics, Sendai, Japan.
Afsar, Mohammed. / Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data. Sixteenth International Conference on Flow Dynamics, Sendai, Japan.2 p.
@conference{f1568e4a29be424086c25014c5be405c,
title = "Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data",
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 = "Mohammed Afsar",
year = "2019",
month = "11",
day = "7",
language = "English",
note = "Sixteenth International Conference on Flow Dynamics, ICFD-2019 ; Conference date: 06-11-2019 Through 08-11-2019",
url = "http://www.ifs.tohoku.ac.jp/",

}

Afsar, M 2019, 'Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data' Sixteenth International Conference on Flow Dynamics, Sendai, Japan, 6/11/19 - 8/11/19, .

Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data. / Afsar, Mohammed.

2019. Sixteenth International Conference on Flow Dynamics, Sendai, Japan.

Research output: Contribution to conferenceOther

TY - CONF

T1 - Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data

AU - Afsar, Mohammed

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

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

M3 - Other

ER -

Afsar M. Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data. 2019. Sixteenth International Conference on Flow Dynamics, Sendai, Japan.