CFD analysis of helical nozzles effects on the energy separation in a vortex tube
In this article computational fluid dynamics (CFD) analysis of a three-dimensional steady state compressible and turbulent flow has been carried out through a vortex tube. The numerical models use the k-? turbulence model to simulate an axisymmetric computational domain along with periodic boundary...
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| Veröffentlicht in: | Thermal science 2012, Vol.16 (1), p.151-166 |
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| creator | Pourmahmoud, Nader Zadeh, Hassan Moutaby, Omid Bramo, Abdolreza |
| description | In this article computational fluid dynamics (CFD) analysis of a
three-dimensional steady state compressible and turbulent flow has been
carried out through a vortex tube. The numerical models use the k-?
turbulence model to simulate an axisymmetric computational domain along with
periodic boundary conditions. The present research has focused on the energy
separation and flow field behavior of a vortex tube by utilizing both
straight and helical nozzles. Three kinds of nozzles set include of 3 and 6
straight and 3 helical nozzles have been investigated and their principal
effects as cold temperature difference was compared. The studied vortex tubes
dimensions are kept the same for all models. The numerical values of hot and
cold outlet temperature differences indicate the considerable operating role
of helical nozzles, even a few numbers of that in comparing with straight
nozzles. The results showed that this type of nozzles causes to form higher
swirl velocity in the vortex chamber than the straight one. To be presented
numerical results in this paper are validated by both available experimental
data and flow characteristics such as stagnation point situation and the
location of maximum wall temperature as two important facts. These
comparisons showed reasonable agreement.
nema |
| doi_str_mv | 10.2298/TSCI110531085P |
| format | Article |
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three-dimensional steady state compressible and turbulent flow has been
carried out through a vortex tube. The numerical models use the k-?
turbulence model to simulate an axisymmetric computational domain along with
periodic boundary conditions. The present research has focused on the energy
separation and flow field behavior of a vortex tube by utilizing both
straight and helical nozzles. Three kinds of nozzles set include of 3 and 6
straight and 3 helical nozzles have been investigated and their principal
effects as cold temperature difference was compared. The studied vortex tubes
dimensions are kept the same for all models. The numerical values of hot and
cold outlet temperature differences indicate the considerable operating role
of helical nozzles, even a few numbers of that in comparing with straight
nozzles. The results showed that this type of nozzles causes to form higher
swirl velocity in the vortex chamber than the straight one. To be presented
numerical results in this paper are validated by both available experimental
data and flow characteristics such as stagnation point situation and the
location of maximum wall temperature as two important facts. These
comparisons showed reasonable agreement.
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three-dimensional steady state compressible and turbulent flow has been
carried out through a vortex tube. The numerical models use the k-?
turbulence model to simulate an axisymmetric computational domain along with
periodic boundary conditions. The present research has focused on the energy
separation and flow field behavior of a vortex tube by utilizing both
straight and helical nozzles. Three kinds of nozzles set include of 3 and 6
straight and 3 helical nozzles have been investigated and their principal
effects as cold temperature difference was compared. The studied vortex tubes
dimensions are kept the same for all models. The numerical values of hot and
cold outlet temperature differences indicate the considerable operating role
of helical nozzles, even a few numbers of that in comparing with straight
nozzles. The results showed that this type of nozzles causes to form higher
swirl velocity in the vortex chamber than the straight one. To be presented
numerical results in this paper are validated by both available experimental
data and flow characteristics such as stagnation point situation and the
location of maximum wall temperature as two important facts. These
comparisons showed reasonable agreement.
nema</description><subject>Boundary conditions</subject><subject>Compressibility</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Equilibrium flow</subject><subject>Flow characteristics</subject><subject>Fluid flow</subject><subject>K-epsilon turbulence model</subject><subject>Mathematical models</subject><subject>Nozzles</subject><subject>Numerical models</subject><subject>Separation</subject><subject>Stagnation point</subject><subject>Temperature gradients</subject><subject>Three dimensional analysis</subject><subject>Tubes</subject><subject>Turbulence models</subject><subject>Turbulent flow</subject><subject>Vortex chambers</subject><subject>Vortices</subject><subject>Wall temperature</subject><issn>0354-9836</issn><issn>2334-7163</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpVkM1Lw0AUxBdRsFavnhc8p-5HNrs5SrS1UFCxnsPL5q1NiUncTcX2r3elXrzMg5nhwfwIueZsJkRubtevxZJzpiRnRj2fkImQMk00z-QpmTCp0iQ3MjsnFyFsGcsyY_SEvBTzewodtPvQBNo7usG2sdDSrj8cWgwUnUM7xqij4wYpdujf9zTgAB7GJrpNR4F-9X7EbzruKrwkZw7agFd_d0re5g_r4jFZPS2Wxd0qsVyJIeE5VjWvHdToJHBhbZZWqZbKsoo5JXOhM64laCadFYBRoq8B0tpxVTM5JTfHv4PvP3cYxnLb73xcEkqRRh6ZNobH1uzYsr4PwaMrB998gN-XnJW_2Mr_2OQPKUJggg</recordid><startdate>2012</startdate><enddate>2012</enddate><creator>Pourmahmoud, Nader</creator><creator>Zadeh, Hassan</creator><creator>Moutaby, Omid</creator><creator>Bramo, Abdolreza</creator><general>Society of Thermal Engineers of Serbia</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>2012</creationdate><title>CFD analysis of helical nozzles effects on the energy separation in a vortex tube</title><author>Pourmahmoud, Nader ; 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three-dimensional steady state compressible and turbulent flow has been
carried out through a vortex tube. The numerical models use the k-?
turbulence model to simulate an axisymmetric computational domain along with
periodic boundary conditions. The present research has focused on the energy
separation and flow field behavior of a vortex tube by utilizing both
straight and helical nozzles. Three kinds of nozzles set include of 3 and 6
straight and 3 helical nozzles have been investigated and their principal
effects as cold temperature difference was compared. The studied vortex tubes
dimensions are kept the same for all models. The numerical values of hot and
cold outlet temperature differences indicate the considerable operating role
of helical nozzles, even a few numbers of that in comparing with straight
nozzles. The results showed that this type of nozzles causes to form higher
swirl velocity in the vortex chamber than the straight one. To be presented
numerical results in this paper are validated by both available experimental
data and flow characteristics such as stagnation point situation and the
location of maximum wall temperature as two important facts. These
comparisons showed reasonable agreement.
nema</abstract><cop>Belgrade</cop><pub>Society of Thermal Engineers of Serbia</pub><doi>10.2298/TSCI110531085P</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Free Full-Text Journals in Chemistry |
| subjects | Boundary conditions Compressibility Computational fluid dynamics Computer simulation Equilibrium flow Flow characteristics Fluid flow K-epsilon turbulence model Mathematical models Nozzles Numerical models Separation Stagnation point Temperature gradients Three dimensional analysis Tubes Turbulence models Turbulent flow Vortex chambers Vortices Wall temperature |
| title | CFD analysis of helical nozzles effects on the energy separation in a vortex tube |
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