The Effects of Open-Loop Control on a Two-Dimensional Bluff Body

G. Easanesan; D. Burton; M. C. Thompson

doi:10.14264/7e32706

The Effects of Open-Loop Control on a Two-Dimensional Bluff Body

G. Easanesan, D. Burton, M. C. Thompson

Mechanical & Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

Abstract

Active flow control is a growing area of research, which in the context of road vehicle aerodynamics, holds the potential for significant gains in drag reduction. The present study considers the effect of flow control on a simplified two-dimensional vehicle geometry in the presence of a ground plane. Two square-backed, cylindrical geometries with different nose configurations, are the subject of numerical simulations. Open-loop flow control, in the form of suction and injection, is applied to both geometries, resulting in a reduction in the overall drag on the body. The two different nose shapes induce significantly different levels of leading-edge separation, and as a consequence, vary markedly in their wake flow characteristics. The interaction between this variability in separation levels and the effectiveness of the control method is also examined.

Original language	English
Title of host publication	22nd Australasian Fluid Mechanics Conference, AFMC 2020
Editors	Hubert Chanson, Richard Brown
Publisher	Australasian Fluid Mechanics Society
Number of pages	4
ISBN (Electronic)	9781742723419
DOIs	https://doi.org/10.14264/7e32706
Publication status	Published - 2020
Event	Australasian Fluid Mechanics Conference 2020 - Brisbane, Australia Duration: 7 Dec 2020 → 10 Dec 2020 Conference number: 22nd https://afmc2020.org

Conference

Conference	Australasian Fluid Mechanics Conference 2020
Abbreviated title	AFMC 2020
Country/Territory	Australia
City	Brisbane
Period	7/12/20 → 10/12/20
Internet address	https://afmc2020.org

Keywords

active flow control
Leading-edge separation
numerical simulation
square-backed Ahmed body

Access to Document

10.14264/7e32706

523454597-oaFinal published version, 2.91 MB

Cite this

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title = "The Effects of Open-Loop Control on a Two-Dimensional Bluff Body",

abstract = "Active flow control is a growing area of research, which in the context of road vehicle aerodynamics, holds the potential for significant gains in drag reduction. The present study considers the effect of flow control on a simplified two-dimensional vehicle geometry in the presence of a ground plane. Two square-backed, cylindrical geometries with different nose configurations, are the subject of numerical simulations. Open-loop flow control, in the form of suction and injection, is applied to both geometries, resulting in a reduction in the overall drag on the body. The two different nose shapes induce significantly different levels of leading-edge separation, and as a consequence, vary markedly in their wake flow characteristics. The interaction between this variability in separation levels and the effectiveness of the control method is also examined.",

keywords = "active flow control, Leading-edge separation, numerical simulation, square-backed Ahmed body",

author = "G. Easanesan and D. Burton and Thompson, {M. C.}",

note = "Funding Information: This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI Australia), an NCRIS enabled capability supported by the Australian Government. This work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia. Publisher Copyright: {\textcopyright} 2020 22nd Australasian Fluid Mechanics Conference, AFMC 2020. All rights reserved.; Australasian Fluid Mechanics Conference 2020, AFMC 2020 ; Conference date: 07-12-2020 Through 10-12-2020",

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doi = "10.14264/7e32706",

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editor = "Hubert Chanson and Richard Brown",

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Y1 - 2020

N2 - Active flow control is a growing area of research, which in the context of road vehicle aerodynamics, holds the potential for significant gains in drag reduction. The present study considers the effect of flow control on a simplified two-dimensional vehicle geometry in the presence of a ground plane. Two square-backed, cylindrical geometries with different nose configurations, are the subject of numerical simulations. Open-loop flow control, in the form of suction and injection, is applied to both geometries, resulting in a reduction in the overall drag on the body. The two different nose shapes induce significantly different levels of leading-edge separation, and as a consequence, vary markedly in their wake flow characteristics. The interaction between this variability in separation levels and the effectiveness of the control method is also examined.

AB - Active flow control is a growing area of research, which in the context of road vehicle aerodynamics, holds the potential for significant gains in drag reduction. The present study considers the effect of flow control on a simplified two-dimensional vehicle geometry in the presence of a ground plane. Two square-backed, cylindrical geometries with different nose configurations, are the subject of numerical simulations. Open-loop flow control, in the form of suction and injection, is applied to both geometries, resulting in a reduction in the overall drag on the body. The two different nose shapes induce significantly different levels of leading-edge separation, and as a consequence, vary markedly in their wake flow characteristics. The interaction between this variability in separation levels and the effectiveness of the control method is also examined.

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KW - numerical simulation

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The Effects of Open-Loop Control on a Two-Dimensional Bluff Body

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Conference

Keywords

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