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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booktitle = "Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012",

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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

TY - GEN

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AU - Wu, Yanhua

AU - Ren, Huiying

AU - Tang, Hui

PY - 2012/1/1

Y1 - 2012/1/1

N2 - 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.

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.

UR - https://www.scopus.com/pages/publications/84959017506

M3 - Conference article published in proceeding or book

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

PB - Australasian Fluid Mechanics Society

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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