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

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dc.contributor.authorKracík Jancs
dc.contributor.authorDvořák Václavcs
dc.date.accessioned2018-09-25T12:10:42Z
dc.date.available2018-09-25T12:10:42Z
dc.date.issued2017cs
dc.description.abstractThis work aims at investigating the primary nozzle position in a proposed supersonic air ejector device. The ejector is primarily made up of a supersonic primary nozzle, which is located in the axis of the ejector, a suction chamber or secondary stream inlet, a mixing chamber and a diffuser. The ejector design allows to translate the primary nozzle in the axis direction and fix it in a chosen distance from the beginning of the mixing chamber and hence influence the secondary mass flow rate. In a limit case, it is possible to set the nozzle to such a position where no secondary flow occurs. If we ignore the case where no secondary flow occurs, five different nozzle distances have been investigated in this paper. Some cases seem to be alike and there are no significant dissimilarities between them. Courses of relative back-pressure ratio are carried out against 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 plate method. In addition, a comparison between experiments and simulations performed by Ansys Fluent software is presented in order to indicate further improvements to the numerical model.en
dc.format.extent6cs
dc.identifier.doi10.1051/epjconf/201714302056
dc.identifier.issn2100-014Xcs
dc.identifier.urihttps://dspace.tul.cz/handle/15240/30696
dc.identifier.urihttps://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02056/epjconf_efm2017_02056.html
dc.language.isoengcs
dc.relation.ispartofseries0cs
dc.relation.urihttps://www.epj-conferences.org/articles/epjconf/pdf/2017/12/epjconf_efm2017_02056.pdfcs
dc.subjectejectorcs
dc.subjectprimary nozzlecs
dc.titlePreliminary study of the primary nozzle position of a supersonic air ejector with a constant-area mixing chamberen
dc.titlePreliminary study of the primary nozzle position of a supersonic air ejector with a constant-Area mixing chambercs
local.identifier.publikace4146
local.identifier.wok407743800058en
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