Experimental Attenuation of a Trailing Vortex Inspired by Stability Analysis

Ross Richardson; Brian Eckert; Yang Zhang; Louis N. Cattafesta; Adam Edstrand; Yiyang Sun; Peter Schmid; Kunihiko Taira

doi:10.1007/978-3-030-67902-6_27

Experimental Attenuation of a Trailing Vortex Inspired by Stability Analysis

Ross Richardson, Brian Eckert, Yang Zhang, Louis N. Cattafesta, Adam Edstrand, Yiyang Sun, Peter Schmid, Kunihiko Taira

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

Abstract

Inspired by a parabolized stability analysis [1], higher-order wake instability modes are targeted via the actuation of a tensioned string in the mean-chord-plane just aft of the trailing edge of a NACA0012 half-wing at 5∘ angle of attack and a chord based Reynolds number (Rec ) of 1.32 × 105. Stereoscopic Particle Image Velocimetry (SPIV) and a load cell are used to assess the effects of the control just downstream of the trailing edge and 6.5 chords downstream. The results reveal increased turbulence intensity in the wake that is engulfed into the vortex during its formation, and a reduction in the time-averaged streamwise vorticity downstream with minimal loss of lift, providing evidence of the possibility of exciting instability modes for subsequent attenuation of the vortex farther downstream.

Original language	English (US)
Title of host publication	IUTAM Bookseries
Publisher	Springer Science and Business Media B.V.
Pages	313-323
Number of pages	11
DOIs	https://doi.org/10.1007/978-3-030-67902-6_27
State	Published - Jan 1 2022
Externally published	Yes

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10.1007/978-3-030-67902-6_27

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title = "Experimental Attenuation of a Trailing Vortex Inspired by Stability Analysis",

abstract = "Inspired by a parabolized stability analysis [1], higher-order wake instability modes are targeted via the actuation of a tensioned string in the mean-chord-plane just aft of the trailing edge of a NACA0012 half-wing at 5∘ angle of attack and a chord based Reynolds number (Rec ) of 1.32 × 105. Stereoscopic Particle Image Velocimetry (SPIV) and a load cell are used to assess the effects of the control just downstream of the trailing edge and 6.5 chords downstream. The results reveal increased turbulence intensity in the wake that is engulfed into the vortex during its formation, and a reduction in the time-averaged streamwise vorticity downstream with minimal loss of lift, providing evidence of the possibility of exciting instability modes for subsequent attenuation of the vortex farther downstream.",

author = "Ross Richardson and Brian Eckert and Yang Zhang and Cattafesta, {Louis N.} and Adam Edstrand and Yiyang Sun and Peter Schmid and Kunihiko Taira",

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T1 - Experimental Attenuation of a Trailing Vortex Inspired by Stability Analysis

AU - Richardson, Ross

AU - Eckert, Brian

AU - Zhang, Yang

AU - Cattafesta, Louis N.

AU - Edstrand, Adam

AU - Sun, Yiyang

AU - Schmid, Peter

AU - Taira, Kunihiko

N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Inspired by a parabolized stability analysis [1], higher-order wake instability modes are targeted via the actuation of a tensioned string in the mean-chord-plane just aft of the trailing edge of a NACA0012 half-wing at 5∘ angle of attack and a chord based Reynolds number (Rec ) of 1.32 × 105. Stereoscopic Particle Image Velocimetry (SPIV) and a load cell are used to assess the effects of the control just downstream of the trailing edge and 6.5 chords downstream. The results reveal increased turbulence intensity in the wake that is engulfed into the vortex during its formation, and a reduction in the time-averaged streamwise vorticity downstream with minimal loss of lift, providing evidence of the possibility of exciting instability modes for subsequent attenuation of the vortex farther downstream.

AB - Inspired by a parabolized stability analysis [1], higher-order wake instability modes are targeted via the actuation of a tensioned string in the mean-chord-plane just aft of the trailing edge of a NACA0012 half-wing at 5∘ angle of attack and a chord based Reynolds number (Rec ) of 1.32 × 105. Stereoscopic Particle Image Velocimetry (SPIV) and a load cell are used to assess the effects of the control just downstream of the trailing edge and 6.5 chords downstream. The results reveal increased turbulence intensity in the wake that is engulfed into the vortex during its formation, and a reduction in the time-averaged streamwise vorticity downstream with minimal loss of lift, providing evidence of the possibility of exciting instability modes for subsequent attenuation of the vortex farther downstream.

UR - https://link.springer.com/10.1007/978-3-030-67902-6_27

UR - http://www.scopus.com/inward/record.url?scp=85112597978&partnerID=8YFLogxK

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EP - 323

BT - IUTAM Bookseries

PB - Springer Science and Business Media B.V.

ER -

Experimental Attenuation of a Trailing Vortex Inspired by Stability Analysis

Abstract

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