Cargando…

Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets

This paper describes the results of methodical investigations of the effect of the Pitot tube on measurements of gas-dynamic parameters of supersonic axisymmetric underexpanded real and model microjets. Particular attention is paid to distortions of Pitot pressure variations on the jet axis associat...

Descripción completa

Detalles Bibliográficos
Autores principales: Mironov, Sergey G., Aniskin, Vladimir M., Korotaeva, Tatiana A., Tsyryulnikov, Ivan S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523214/
https://www.ncbi.nlm.nih.gov/pubmed/30959859
http://dx.doi.org/10.3390/mi10040235
_version_ 1783419282501140480
author Mironov, Sergey G.
Aniskin, Vladimir M.
Korotaeva, Tatiana A.
Tsyryulnikov, Ivan S.
author_facet Mironov, Sergey G.
Aniskin, Vladimir M.
Korotaeva, Tatiana A.
Tsyryulnikov, Ivan S.
author_sort Mironov, Sergey G.
collection PubMed
description This paper describes the results of methodical investigations of the effect of the Pitot tube on measurements of gas-dynamic parameters of supersonic axisymmetric underexpanded real and model microjets. Particular attention is paid to distortions of Pitot pressure variations on the jet axis associated with the wave structure of the jet and to distortions of the supersonic core length. In experiments with model jets escaping from nozzles with diameters ranging from 0.52 to 1.06 mm into the low-pressure chamber, the measurements are performed by the Pitot tubes 0.05 to 2 mm in diameter. The results are analyzed together with the earlier obtained data for real microjets escaping from nozzles with diameters ranging from 10 to 340 µm where the parameters of real microjets were determined by the Pitot microtube 12 µm in diameter. Interaction of the Pitot tube with an unsteady jet in the laminar-turbulent transition region is investigated; the influence of this interaction on Pitot pressure measurements is determined, and a physical interpretation of this phenomenon is provided.
format Online
Article
Text
id pubmed-6523214
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-65232142019-06-03 Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets Mironov, Sergey G. Aniskin, Vladimir M. Korotaeva, Tatiana A. Tsyryulnikov, Ivan S. Micromachines (Basel) Article This paper describes the results of methodical investigations of the effect of the Pitot tube on measurements of gas-dynamic parameters of supersonic axisymmetric underexpanded real and model microjets. Particular attention is paid to distortions of Pitot pressure variations on the jet axis associated with the wave structure of the jet and to distortions of the supersonic core length. In experiments with model jets escaping from nozzles with diameters ranging from 0.52 to 1.06 mm into the low-pressure chamber, the measurements are performed by the Pitot tubes 0.05 to 2 mm in diameter. The results are analyzed together with the earlier obtained data for real microjets escaping from nozzles with diameters ranging from 10 to 340 µm where the parameters of real microjets were determined by the Pitot microtube 12 µm in diameter. Interaction of the Pitot tube with an unsteady jet in the laminar-turbulent transition region is investigated; the influence of this interaction on Pitot pressure measurements is determined, and a physical interpretation of this phenomenon is provided. MDPI 2019-04-06 /pmc/articles/PMC6523214/ /pubmed/30959859 http://dx.doi.org/10.3390/mi10040235 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mironov, Sergey G.
Aniskin, Vladimir M.
Korotaeva, Tatiana A.
Tsyryulnikov, Ivan S.
Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title_full Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title_fullStr Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title_full_unstemmed Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title_short Effect of the Pitot Tube on Measurements in Supersonic Axisymmetric Underexpanded Microjets
title_sort effect of the pitot tube on measurements in supersonic axisymmetric underexpanded microjets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523214/
https://www.ncbi.nlm.nih.gov/pubmed/30959859
http://dx.doi.org/10.3390/mi10040235
work_keys_str_mv AT mironovsergeyg effectofthepitottubeonmeasurementsinsupersonicaxisymmetricunderexpandedmicrojets
AT aniskinvladimirm effectofthepitottubeonmeasurementsinsupersonicaxisymmetricunderexpandedmicrojets
AT korotaevatatianaa effectofthepitottubeonmeasurementsinsupersonicaxisymmetricunderexpandedmicrojets
AT tsyryulnikovivans effectofthepitottubeonmeasurementsinsupersonicaxisymmetricunderexpandedmicrojets