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Flow Separation Control Using Piezoe...

Wu, Maria.

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Flow Separation Control Using Piezoelectric Micro-blowers.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Flow Separation Control Using Piezoelectric Micro-blowers./
作者:	Wu, Maria.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	83 p.
附註:	Source: Masters Abstracts International, Volume: 81-06.
Contained By:	Masters Abstracts International81-06.
標題:	Fluid mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22624322
ISBN:	9781392844762

Flow Separation Control Using Piezoelectric Micro-blowers.
Wu, Maria.

Flow Separation Control Using Piezoelectric Micro-blowers. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 83 p.

Source: Masters Abstracts International, Volume: 81-06.

Thesis (M.A.S.)--University of Toronto (Canada), 2019.

This item must not be sold to any third party vendors.

A compact piezoelectric micro-blower was characterized as a potential synthetic jet using PIV to measure the velocity field near the jet exit for both continuous and burst modes. The jet produced relatively high exit velocities but had varying characteristics between micro-blowers. Regions of counter-rotating vortex pairs were generated in burst mode and the maximum velocity decreased with increasing excitation frequency. Wind tunnel experiments were conducted to investigate the effect of actuation on flow separation via a span-wise row of micro-blowers installed in a NACA 0012 airfoil at an angle-of-attack of 22 and chord-based Reynolds number of 150 000. Low and high frequency excitation were used to target flow instabilities and effects of actuation were determined through the pressure distribution, lift coefficient, and flow visualization. Both low and high frequency excitation showed small improvements in the lift coefficient, but smoke-wire results suggest that high frequency excitation is more effective.

ISBN: 9781392844762Subjects--Topical Terms:

528155
Fluid mechanics.
Subjects--Index Terms:

Flow control

Flow Separation Control Using Piezoelectric Micro-blowers.
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520 $a A compact piezoelectric micro-blower was characterized as a potential synthetic jet using PIV to measure the velocity field near the jet exit for both continuous and burst modes. The jet produced relatively high exit velocities but had varying characteristics between micro-blowers. Regions of counter-rotating vortex pairs were generated in burst mode and the maximum velocity decreased with increasing excitation frequency. Wind tunnel experiments were conducted to investigate the effect of actuation on flow separation via a span-wise row of micro-blowers installed in a NACA 0012 airfoil at an angle-of-attack of 22 and chord-based Reynolds number of 150 000. Low and high frequency excitation were used to target flow instabilities and effects of actuation were determined through the pressure distribution, lift coefficient, and flow visualization. Both low and high frequency excitation showed small improvements in the lift coefficient, but smoke-wire results suggest that high frequency excitation is more effective.
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