Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion

Mohammed Afsar; Ioannis Kokkinakis; Sarah Stirrat

Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion

Mohammed Afsar, Ioannis Kokkinakis, Sarah Stirrat

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Abstract

In this paper we investigate the distortion of an unsteady flow through a two-dimensional sudden area expansion using LargeEddy Simulations. We perform a series of numerical experiments at various Mach numbers (Mb = (0.1, 0.5)) based on the inlet volume flow rate and fixed O(1) contraction ratio. At Mb = 0.1, we find that the transverse components of the auto-correlation of the two-point time-delayed velocity correlation tensor de-correlates slower in the downstream expansion compared to the channel section. We discuss this result in the context of classical and rapid-distortion theory.

Original language	English
Number of pages	2
Publication status	Published - 28 Oct 2020
Event	Seventeenth International Conference on Flow Dynamics - Virtual Conference and Tohoku University, Sendai, Japan Duration: 28 Oct 2020 → 30 Oct 2020 http://www.ifs.tohoku.ac.jp/icfd2020/

Conference

Conference	Seventeenth International Conference on Flow Dynamics
Abbreviated title	ICFD17 2020
Country/Territory	Japan
City	Sendai
Period	28/10/20 → 30/10/20
Internet address	http://www.ifs.tohoku.ac.jp/icfd2020/

Keywords

aeroacoustics
trailing edge noise
rapid-distortion theory
optimization

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Asfar-etal-ICFD-2020-Large-Eddy-simulation-of-non-homogeneous-turbulence-subjected-to-sudden-distortionAccepted author manuscript, 656 KB

Cite this

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title = "Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion",

abstract = "In this paper we investigate the distortion of an unsteady flow through a two-dimensional sudden area expansion using LargeEddy Simulations. We perform a series of numerical experiments at various Mach numbers (Mb = (0.1, 0.5)) based on the inlet volume flow rate and fixed O(1) contraction ratio. At Mb = 0.1, we find that the transverse components of the auto-correlation of the two-point time-delayed velocity correlation tensor de-correlates slower in the downstream expansion compared to the channel section. We discuss this result in the context of classical and rapid-distortion theory. ",

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T1 - Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion

AU - Afsar, Mohammed

AU - Kokkinakis, Ioannis

AU - Stirrat, Sarah

PY - 2020/10/28

Y1 - 2020/10/28

N2 - In this paper we investigate the distortion of an unsteady flow through a two-dimensional sudden area expansion using LargeEddy Simulations. We perform a series of numerical experiments at various Mach numbers (Mb = (0.1, 0.5)) based on the inlet volume flow rate and fixed O(1) contraction ratio. At Mb = 0.1, we find that the transverse components of the auto-correlation of the two-point time-delayed velocity correlation tensor de-correlates slower in the downstream expansion compared to the channel section. We discuss this result in the context of classical and rapid-distortion theory.

AB - In this paper we investigate the distortion of an unsteady flow through a two-dimensional sudden area expansion using LargeEddy Simulations. We perform a series of numerical experiments at various Mach numbers (Mb = (0.1, 0.5)) based on the inlet volume flow rate and fixed O(1) contraction ratio. At Mb = 0.1, we find that the transverse components of the auto-correlation of the two-point time-delayed velocity correlation tensor de-correlates slower in the downstream expansion compared to the channel section. We discuss this result in the context of classical and rapid-distortion theory.

KW - aeroacoustics

KW - trailing edge noise

KW - rapid-distortion theory

KW - optimization

M3 - Paper

T2 - Seventeenth International Conference on Flow Dynamics

Y2 - 28 October 2020 through 30 October 2020

ER -

Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion

Abstract

Conference

Keywords

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