Non-harmonic excitation of synthetic jet actuators based on electrodynamic transducers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00492687" target="_blank" >RIV/61388998:_____/18:00492687 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijheatfluidflow.2018.07.003" target="_blank" >http://dx.doi.org/10.1016/j.ijheatfluidflow.2018.07.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijheatfluidflow.2018.07.003" target="_blank" >10.1016/j.ijheatfluidflow.2018.07.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Non-harmonic excitation of synthetic jet actuators based on electrodynamic transducers

Popis výsledku v původním jazyce

An axisymmetric synthetic jet actuator based on a loudspeaker was tested experimentally. The actuator was driven by a voltage waveform, whose shape was derived from a pulse-width modulated signal. With the duty cycle and frequency of the excitation voltage varied at a constant electrical input power level and fixed nozzle diameter, the momentum flux of the jet (the jet thrust) was measured using precision scales. The maximum of the measured momentum flux was found at the optimum driving frequency and the duty cycle. This experiment was repeated for several input power levels and nozzle diameters, and the resultant optimal driving configurations were compared with adequate results for a harmonically driven actuator with identical geometry. Based on a newly introduced dimensionless nozzle diameter, a criterion was found that states conditions under which it is advantageous to use the suggested non-harmonic excitation.

Název v anglickém jazyce

Non-harmonic excitation of synthetic jet actuators based on electrodynamic transducers

Popis výsledku anglicky

An axisymmetric synthetic jet actuator based on a loudspeaker was tested experimentally. The actuator was driven by a voltage waveform, whose shape was derived from a pulse-width modulated signal. With the duty cycle and frequency of the excitation voltage varied at a constant electrical input power level and fixed nozzle diameter, the momentum flux of the jet (the jet thrust) was measured using precision scales. The maximum of the measured momentum flux was found at the optimum driving frequency and the duty cycle. This experiment was repeated for several input power levels and nozzle diameters, and the resultant optimal driving configurations were compared with adequate results for a harmonically driven actuator with identical geometry. Based on a newly introduced dimensionless nozzle diameter, a criterion was found that states conditions under which it is advantageous to use the suggested non-harmonic excitation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA16-16596S" target="_blank" >GA16-16596S: Optimalizace generování pulzujících proudů v mechanice tekutin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Heat and Fluid Flow

ISSN

0142-727X

e-ISSN

—

Svazek periodika

73

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

154-162

Kód UT WoS článku

000452345000013

EID výsledku v databázi Scopus

2-s2.0-85051661501