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Combined Thermo-Hydraulic Analysis of a Cryogenic Jet

A cryogenic jet is a phenomenon encountered in different fields like some technological processes and cryosurgery. It may also be a result of cryogenic equipment rupture or a cryogen discharge from the cryostats following resistive transition in superconducting magnets. Heat exchange between a cold...

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Autor principal: Chorowski, M
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:http://cds.cern.ch/record/410386
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author Chorowski, M
author_facet Chorowski, M
author_sort Chorowski, M
collection CERN
description A cryogenic jet is a phenomenon encountered in different fields like some technological processes and cryosurgery. It may also be a result of cryogenic equipment rupture or a cryogen discharge from the cryostats following resistive transition in superconducting magnets. Heat exchange between a cold jet and a warm steel element (e.g. a buffer tank wall or a transfer line vacuum vessel wall) may result in an excessive localisation of thermal strains and stresses. The objective of the analysis is to get a combined (analytical and experimental) one-dimensional model of a cryogenic jet that will enable estimation of heat transfer intensity between the jet and steel plate with a suitable accuracy for engineering applications. The jet diameter can only be determined experimentally. The mean velocity profile can be calculated from the fact that the total flux of momentum along the jet axis is conserved. The proposed model allows deriving the jet crown area with respect to the distance from the vent and the mean velocity profile along the jet axis. A simple formula to assess convective heat exchange between the jet and a solid obstacle has been proposed and experimentally verified.
id cern-410386
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
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spelling cern-4103862023-05-31T13:22:09Zhttp://cds.cern.ch/record/410386engChorowski, MCombined Thermo-Hydraulic Analysis of a Cryogenic JetAccelerators and Storage RingsA cryogenic jet is a phenomenon encountered in different fields like some technological processes and cryosurgery. It may also be a result of cryogenic equipment rupture or a cryogen discharge from the cryostats following resistive transition in superconducting magnets. Heat exchange between a cold jet and a warm steel element (e.g. a buffer tank wall or a transfer line vacuum vessel wall) may result in an excessive localisation of thermal strains and stresses. The objective of the analysis is to get a combined (analytical and experimental) one-dimensional model of a cryogenic jet that will enable estimation of heat transfer intensity between the jet and steel plate with a suitable accuracy for engineering applications. The jet diameter can only be determined experimentally. The mean velocity profile can be calculated from the fact that the total flux of momentum along the jet axis is conserved. The proposed model allows deriving the jet crown area with respect to the distance from the vent and the mean velocity profile along the jet axis. A simple formula to assess convective heat exchange between the jet and a solid obstacle has been proposed and experimentally verified.LHC-Project-Report-325CERN-LHC-Project-Report-325oai:cds.cern.ch:4103861999-12-01
spellingShingle Accelerators and Storage Rings
Chorowski, M
Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title_full Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title_fullStr Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title_full_unstemmed Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title_short Combined Thermo-Hydraulic Analysis of a Cryogenic Jet
title_sort combined thermo-hydraulic analysis of a cryogenic jet
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/410386
work_keys_str_mv AT chorowskim combinedthermohydraulicanalysisofacryogenicjet