Lift-Generation and Moving-Wall Flow Control over a Low Aspect Ratio Airfoil

Mohammed Amin Boukenkoul; Feng Chen Li; Wen Li Chen; Hong Na Zhang

doi:10.1115/1.4037681

Lift-Generation and Moving-Wall Flow Control over a Low Aspect Ratio Airfoil

Mohammed Amin Boukenkoul^*
, Feng Chen Li
, Wen Li Chen
, Hong Na Zhang

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology
School of Civil Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Despite the big interest in both, micro-air vehicles (MAV) and flow-control strategies, only few studies have investigated the flow-control possibilities over low aspect ratio (LAR) wings flying at low Reynolds numbers (Re). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving- wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4104. The moving belt control postponed the stall onset by 25 deg and produced a 103% gain in lift without any saturation signs at a control speed ratio of Ub/U6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover, other quantities such as the, vortices, and the swirling strength are investigated.

Original language	English
Article number	011104
Journal	Journal of Fluids Engineering
Volume	140
Issue number	1
DOIs	https://doi.org/10.1115/1.4037681
State	Published - 1 Jan 2018
Externally published	Yes

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title = "Lift-Generation and Moving-Wall Flow Control over a Low Aspect Ratio Airfoil",

abstract = "Despite the big interest in both, micro-air vehicles (MAV) and flow-control strategies, only few studies have investigated the flow-control possibilities over low aspect ratio (LAR) wings flying at low Reynolds numbers (Re). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving- wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4104. The moving belt control postponed the stall onset by 25 deg and produced a 103\% gain in lift without any saturation signs at a control speed ratio of Ub/U6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover, other quantities such as the, vortices, and the swirling strength are investigated.",

author = "Boukenkoul, \{Mohammed Amin\} and Li, \{Feng Chen\} and Chen, \{Wen Li\} and Zhang, \{Hong Na\}",

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doi = "10.1115/1.4037681",

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AU - Li, Feng Chen

AU - Chen, Wen Li

AU - Zhang, Hong Na

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Y1 - 2018/1/1

N2 - Despite the big interest in both, micro-air vehicles (MAV) and flow-control strategies, only few studies have investigated the flow-control possibilities over low aspect ratio (LAR) wings flying at low Reynolds numbers (Re). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving- wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4104. The moving belt control postponed the stall onset by 25 deg and produced a 103% gain in lift without any saturation signs at a control speed ratio of Ub/U6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover, other quantities such as the, vortices, and the swirling strength are investigated.

AB - Despite the big interest in both, micro-air vehicles (MAV) and flow-control strategies, only few studies have investigated the flow-control possibilities over low aspect ratio (LAR) wings flying at low Reynolds numbers (Re). The present study verified the LAR thick airfoils' conformity with the nonlinear lift approximation equation. Then, a moving- wall flow control method was designed and tested over an LAR thick airfoil (0.57 aspect ration (AR), NACA0015 shaped) performing at a chord-based Re of 4104. The moving belt control postponed the stall onset by 25 deg and produced a 103% gain in lift without any saturation signs at a control speed ratio of Ub/U6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover, other quantities such as the, vortices, and the swirling strength are investigated.

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Lift-Generation and Moving-Wall Flow Control over a Low Aspect Ratio Airfoil

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