Registration the outflow of liquid jet from capillary into vacuum

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Abstract

Experimental results of observation of ethanol and propylene glycol microjets flowing into a highly rarefied medium (vacuum) through a nozzle are presented. The study of the outflow process was carried out both for horizontal and vertical outflow of liquid from the source in the direction of gravity. The condition was met for maintaining the residual gas background pressure in the discharge chamber much lower than the saturated vapor pressure of the working fluid at the selected discharge temperature. It is established that the flow from a thin capillary or small-diameter nozzle into a vacuum or highly rarefied gas medium differs significantly from the well-studied flow modes into a dense gas medium. It is shown that in all studied regimes the fluid flow is statistically unstable, with a large number of sudden changes in direction, structure, and observed density. The paper describes the main features of such a flow and the conditions for the onset of instability.

Original languageEnglish
Title of host publicationInternational Conference on the Methods of Aerophysical Research, ICMAR 2020
EditorsVasily M. Fomin, Alexander Shiplyuk
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440999
DOIs
Publication statusPublished - 24 May 2021
Event20th International Conference on the Methods of Aerophysical Research, ICMAR 2020 - Akademgorodok, Novosibirsk, Russian Federation
Duration: 1 Nov 20207 Nov 2020

Publication series

NameAIP Conference Proceedings
Volume2351
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference20th International Conference on the Methods of Aerophysical Research, ICMAR 2020
CountryRussian Federation
CityAkademgorodok, Novosibirsk
Period01.11.202007.11.2020

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