The impacts of scale resolutions on the turbulent flow over a rough backward-facing step

Yanhua Wu; Huiying Ren; Hui Tang

The impacts of scale resolutions on the turbulent flow over a rough backward-facing step

Yanhua Wu, Huiying Ren, Hui Tang

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

PIV measurements are performed in the streamwise-wall-normal planes in turbulent flows over a rough backward-facing step (BFS) and two of the step's coarse-scale approximations. The roughness topography is replicated from real turbine blades and its coarse-scale representations are obtained from a multi-resolution analysis using discrete wavelet transform. The experiments are conducted at Reh=3450 and δ=h=8, where h is the mean step height and δ is the incoming boundary layer thickness. The impacts of the roughness scale resolutions on the BFS turbulent flows are investigated by examining the mean flow structures and the turbulence kinetic energy ({u′2 +v′2}) distributions.

Original language	English
Title of host publication	Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
Publisher	Australasian Fluid Mechanics Society
ISBN (Electronic)	9780646583730
Publication status	Published - 1 Jan 2012
Externally published	Yes
Event	18th Australasian Fluid Mechanics Conference, AFMC 2012 - Launceston, Australia Duration: 3 Dec 2012 → 7 Dec 2012

Conference

Conference	18th Australasian Fluid Mechanics Conference, AFMC 2012
Country/Territory	Australia
City	Launceston
Period	3/12/12 → 7/12/12

ASJC Scopus subject areas

Fluid Flow and Transfer Processes

Cite this

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title = "The impacts of scale resolutions on the turbulent flow over a rough backward-facing step",

abstract = "PIV measurements are performed in the streamwise-wall-normal planes in turbulent flows over a rough backward-facing step (BFS) and two of the step's coarse-scale approximations. The roughness topography is replicated from real turbine blades and its coarse-scale representations are obtained from a multi-resolution analysis using discrete wavelet transform. The experiments are conducted at Reh=3450 and δ=h=8, where h is the mean step height and δ is the incoming boundary layer thickness. The impacts of the roughness scale resolutions on the BFS turbulent flows are investigated by examining the mean flow structures and the turbulence kinetic energy ({u′2 +v′2}) distributions.",

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The impacts of scale resolutions on the turbulent flow over a rough backward-facing step. / Wu, Yanhua; Ren, Huiying; Tang, Hui.
Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012. Australasian Fluid Mechanics Society, 2012.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AB - PIV measurements are performed in the streamwise-wall-normal planes in turbulent flows over a rough backward-facing step (BFS) and two of the step's coarse-scale approximations. The roughness topography is replicated from real turbine blades and its coarse-scale representations are obtained from a multi-resolution analysis using discrete wavelet transform. The experiments are conducted at Reh=3450 and δ=h=8, where h is the mean step height and δ is the incoming boundary layer thickness. The impacts of the roughness scale resolutions on the BFS turbulent flows are investigated by examining the mean flow structures and the turbulence kinetic energy ({u′2 +v′2}) distributions.

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M3 - Conference article published in proceeding or book

BT - Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012

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T2 - 18th Australasian Fluid Mechanics Conference, AFMC 2012

Y2 - 3 December 2012 through 7 December 2012

ER -

The impacts of scale resolutions on the turbulent flow over a rough backward-facing step

Abstract

Conference

ASJC Scopus subject areas

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