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research-article

A synthetic jet issuing from a bio-inspired actuator with an oscillating nozzle lip

[+] Author and Article Information
Zdenek Travnicek

Institute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, 182 00 Prague 8, Czech Republic
tr@it.cas.cz

Zuzana Brouckova

Institute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, 182 00 Prague 8, Czech Republic
brouckova@it.cas.cz

1Corresponding author.

ASME doi:10.1115/1.4039792 History: Received November 27, 2017; Revised March 06, 2018

Abstract

A novel variant of a synthetic jet actuator (SJA) has been designed, manufactured and tested. The novelty consists in a bio-inspired nozzle whose oscillating lip is formed by a flexible diaphragm rim. The working fluid is air, and the operating frequency is 65 Hz. The proposed SJA was tested by three experimental methods: phase-locked visualization of the nozzle lips, hot-wire anemometry, and momentum flux measurement using a precision scale. The results demonstrate advantages of the proposed SJA, namely, an increase in the momentum flux by 18% compared with that of a conventional SJA.

Copyright (c) 2018 by ASME
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