Application of Prandtl’s Theory in the Design of an Experimental Chamber for Static Pressure Measurements

Simple item page
dc.contributor.authorŠabacká, Pavlacs
dc.contributor.authorNeděla, Vilémcs
dc.contributor.authorMaxa, Jiřícs
dc.contributor.authorBayer, Robertcs
dc.coverage.issue20cs
dc.coverage.volume21cs
dc.date.accessioned2021-11-12T22:56:35Z
dc.date.available2021-11-12T22:56:35Z
dc.date.issued2021-09-02cs
dc.description.abstractPumping in vacuum chambers is part of the field of environmental electron microscopy. These chambers are separated from each other by a small-diameter aperture that creates a critical flow in the supersonic flow regime. The distribution of pressure and shock waves in the path of the primary electron beam passing through the differentially pumped chamber has a large influence on the quality of the resulting microscope image. As part of this research, an experimental chamber was constructed to map supersonic flow at low pressures. The shape of this chamber was designed using mathematical–physical analyses, which served not only as a basis for the design of its geometry, but especially for the correct choice of absolute and differential pressure sensors with respect to the cryogenic temperature generated in the supersonic flow. The mathematical and physical analyses presented here map the nature of the supersonic flow with large gradients of state variables at low pressures at the continuum mechanics boundary near the region of free molecule motion in which the Environmental Electron Microscope and its differentially pumped chamber operate, which has a significant impact on the resulting sharpness of the final image obtained by the microscope. The results of this work map the flow in and behind the Laval nozzle in the experimental chamber and are the initial basis that enabled the optimization of the design of the chamber based on Prandtl’s theory for the possibility of fitting it with pressure probes in such a way that they can map the flow in and behind the Laval nozzle.en
dc.formattextcs
dc.format.extent1-13cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationSENSORS. 2021, vol. 21, issue 20, p. 1-13.en
dc.identifier.doi10.3390/s21206849cs
dc.identifier.issn1424-8220cs
dc.identifier.other172956cs
dc.identifier.urihttp://hdl.handle.net/11012/202249
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofSENSORScs
dc.relation.urihttps://www.mdpi.com/1424-8220/21/20/6849cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1424-8220/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectBD sensoren
dc.subjectDifferentially pumped chamberen
dc.subjectESEMen
dc.subjectMach numberen
dc.subjectPrandtl’s theoryen
dc.subjectStatic pressureen
dc.subjectStatic probeen
dc.titleApplication of Prandtl’s Theory in the Design of an Experimental Chamber for Static Pressure Measurementsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-172956en
sync.item.dbtypeVAVen
sync.item.insts2021.12.01 00:56:16en
sync.item.modts2021.12.01 00:16:09en
thesis.grantorVysoké učení technické v Brně. . Ústav přístrojové techniky AV ČRcs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav elektrotechnologiecs
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
sensors2106849v2.pdf
Size:
4.16 MB
Format:
Adobe Portable Document Format
Description:
sensors2106849v2.pdf
Download
Collections
Ústav elektrotechnologie