Integral Quantities of Axisymmetric Synthetic Jets Evaluated from a Direct Jet Thrust Measurement

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00508043" target="_blank" >RIV/61388998:_____/19:00508043 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs10494-019-00042-y" target="_blank" >https://link.springer.com/article/10.1007%2Fs10494-019-00042-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10494-019-00042-y" target="_blank" >10.1007/s10494-019-00042-y</a>

Result language
angličtina
Original language name
Integral Quantities of Axisymmetric Synthetic Jets Evaluated from a Direct Jet Thrust Measurement
Original language description
This paper proposes a relatively simple and user-friendly experimental method for evaluating synthetic jet (SJ) characteristic velocity and fluxes of time-mean momentum and kinetic energy. The proposed method is based on the direct measurement of the SJ thrust by means of precision scales. The measurements were performed over a large range of Reynolds and Stokes numbers. The Reynolds number was between 1600 and 7100, and the Stokes number was between 15.4 and 202. To correlate the obtained results, hot-wire measurements of the velocity profiles were used and spatial-temporal integration of the hot-wire data was performed. To obtain the integral quantities, the correlations between the thrust and hot-wire results were used. Despite the relative simplicity of the proposed method, it yielded a very good evaluation of the characteristic velocity and fluxes of time-mean momentum and kinetic energy. The study was mostly focused on SJs with moderate and high stroke lengths (larger than five diameters of the orifice). The experimental data were within ±3.4% of the proposed correlation. For small stroke lengths (i.e. below five orifice diameters), the maximum deviation was within ±5.4%.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
<a href="/en/project/GA16-16596S" target="_blank" >GA16-16596S: Optimization of pulsatile jet actuation in fluid mechanics</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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