Preliminary study of the primary nozzle position of a supersonic air ejector with a constant-Area mixing chamber

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F17%3A00004146" target="_blank" >RIV/46747885:24210/17:00004146 - isvavai.cz</a>
Result on the web
<a href="https://www.epj-conferences.org/articles/epjconf/pdf/2017/12/epjconf_efm2017_02056.pdf" target="_blank" >https://www.epj-conferences.org/articles/epjconf/pdf/2017/12/epjconf_efm2017_02056.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/201714302056" target="_blank" >10.1051/epjconf/201714302056</a>

Result language
angličtina
Original language name
Preliminary study of the primary nozzle position of a supersonic air ejector with a constant-Area mixing chamber
Original language description
This work aims at investigating the primary nozzle position in a proposed supersonic air ejectordevice. The ejector is primarily made up of a supersonic primary nozzle, which is located in the axis of theejector, a suction chamber or secondary stream inlet, a mixing chamber and a diffuser. The ejector designallows to translate the primary nozzle in the axis direction and fix it in a chosen distance from the beginning ofthe mixing chamber and hence influence the secondary mass flow rate. In a limit case, it is possible to set thenozzle to such a position where no secondary flow occurs. If we ignore the case where no secondary flowoccurs, five different nozzle distances have been investigated in this paper. Some cases seem to be alike andthere are no significant dissimilarities between them. Courses of relative back-pressure ratio are carried outagainst the entrainment ratio and transition between on-design and off-design regimes is determined.Measurements of the mixed flow based on the standard ISO 5167 are performed by means of orifice platemethod. In addition, a comparison between experiments and simulations performed by Ansys Fluent softwareis presented in order to indicate further improvements to the numerical model.
Czech name
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Czech description
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Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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