Interaction of a weak shock wave with a discontinuous heavy-gas cylinder
The interaction between a cylindrical inhomogeneity and a weak planar shock wave is investigated experimentally and numerically, and special attention is given to the wave patterns and vortex dynamics in this scenario. A soap-film technique is realized to generate a well-controlled discontinuous cyl...
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Veröffentlicht in: | Physics of fluids (1994) 2015-06, Vol.27 (6) |
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container_title | Physics of fluids (1994) |
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creator | Wang, Xiansheng Yang, Dangguo Wu, Junqiang Luo, Xisheng |
description | The interaction between a cylindrical inhomogeneity and a weak planar shock wave is investigated experimentally and numerically, and special attention is given to the wave patterns and vortex dynamics in this scenario. A soap-film technique is realized to generate a well-controlled discontinuous cylinder (SF6 surrounded by air) with no supports or wires in the shock-tube experiment. The symmetric evolving interfaces and few disturbance waves are observed in a high-speed schlieren photography. Numerical simulations are also carried out for a detailed analysis. The refracted shock wave inside the cylinder is perturbed by the diffracted shock waves and divided into three branches. When these shock branches collide, the shock focusing occurs. A nonlinear model is then proposed to elucidate effects of the wave patterns on the evolution of the cylinder. A distinct vortex pair is gradually developing during the shock-cylinder interaction. The numerical results show that a low pressure region appears at the vortex core. Subsequently, the ambient fluid is entrained into the vortices which are expanding at the same time. Based on the relation between the vortex motion and the circulation, several theoretical models of circulation in the literature are then checked by the experimental and numerical results. Most of these theoretical circulation models provide a reasonably good prediction of the vortex motion in the present configuration. |
doi_str_mv | 10.1063/1.4922613 |
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A soap-film technique is realized to generate a well-controlled discontinuous cylinder (SF6 surrounded by air) with no supports or wires in the shock-tube experiment. The symmetric evolving interfaces and few disturbance waves are observed in a high-speed schlieren photography. Numerical simulations are also carried out for a detailed analysis. The refracted shock wave inside the cylinder is perturbed by the diffracted shock waves and divided into three branches. When these shock branches collide, the shock focusing occurs. A nonlinear model is then proposed to elucidate effects of the wave patterns on the evolution of the cylinder. A distinct vortex pair is gradually developing during the shock-cylinder interaction. The numerical results show that a low pressure region appears at the vortex core. Subsequently, the ambient fluid is entrained into the vortices which are expanding at the same time. Based on the relation between the vortex motion and the circulation, several theoretical models of circulation in the literature are then checked by the experimental and numerical results. Most of these theoretical circulation models provide a reasonably good prediction of the vortex motion in the present configuration.</description><identifier>ISSN: 1070-6631</identifier><identifier>EISSN: 1089-7666</identifier><identifier>DOI: 10.1063/1.4922613</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Aerodynamics ; AIR ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; Computational fluid dynamics ; Computer simulation ; CYLINDRICAL CONFIGURATION ; DISTURBANCES ; ENGINEERING ; Fluid dynamics ; GAS CYLINDERS ; Inhomogeneity ; INTERACTIONS ; INTERFACES ; Low pressure ; Mathematical models ; NONLINEAR PROBLEMS ; PHOTOGRAPHY ; Physics ; PRESSURE RANGE PA ; Schlieren photography ; SHOCK TUBES ; SHOCK WAVES ; SOAPS ; SULFUR FLUORIDES ; SYMMETRY ; THIN FILMS ; VORTICES ; Wave diffraction</subject><ispartof>Physics of fluids (1994), 2015-06, Vol.27 (6)</ispartof><rights>2015 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c285t-5450eaa5f38b38c4552c4ad82250216b4d930939e57634c3e5d2a9f874dab70f3</citedby><cites>FETCH-LOGICAL-c285t-5450eaa5f38b38c4552c4ad82250216b4d930939e57634c3e5d2a9f874dab70f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22403236$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, Xiansheng</creatorcontrib><creatorcontrib>Yang, Dangguo</creatorcontrib><creatorcontrib>Wu, Junqiang</creatorcontrib><creatorcontrib>Luo, Xisheng</creatorcontrib><title>Interaction of a weak shock wave with a discontinuous heavy-gas cylinder</title><title>Physics of fluids (1994)</title><description>The interaction between a cylindrical inhomogeneity and a weak planar shock wave is investigated experimentally and numerically, and special attention is given to the wave patterns and vortex dynamics in this scenario. A soap-film technique is realized to generate a well-controlled discontinuous cylinder (SF6 surrounded by air) with no supports or wires in the shock-tube experiment. The symmetric evolving interfaces and few disturbance waves are observed in a high-speed schlieren photography. Numerical simulations are also carried out for a detailed analysis. The refracted shock wave inside the cylinder is perturbed by the diffracted shock waves and divided into three branches. When these shock branches collide, the shock focusing occurs. A nonlinear model is then proposed to elucidate effects of the wave patterns on the evolution of the cylinder. A distinct vortex pair is gradually developing during the shock-cylinder interaction. The numerical results show that a low pressure region appears at the vortex core. Subsequently, the ambient fluid is entrained into the vortices which are expanding at the same time. Based on the relation between the vortex motion and the circulation, several theoretical models of circulation in the literature are then checked by the experimental and numerical results. Most of these theoretical circulation models provide a reasonably good prediction of the vortex motion in the present configuration.</description><subject>Aerodynamics</subject><subject>AIR</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>CYLINDRICAL CONFIGURATION</subject><subject>DISTURBANCES</subject><subject>ENGINEERING</subject><subject>Fluid dynamics</subject><subject>GAS CYLINDERS</subject><subject>Inhomogeneity</subject><subject>INTERACTIONS</subject><subject>INTERFACES</subject><subject>Low pressure</subject><subject>Mathematical models</subject><subject>NONLINEAR PROBLEMS</subject><subject>PHOTOGRAPHY</subject><subject>Physics</subject><subject>PRESSURE RANGE PA</subject><subject>Schlieren photography</subject><subject>SHOCK TUBES</subject><subject>SHOCK WAVES</subject><subject>SOAPS</subject><subject>SULFUR FLUORIDES</subject><subject>SYMMETRY</subject><subject>THIN FILMS</subject><subject>VORTICES</subject><subject>Wave diffraction</subject><issn>1070-6631</issn><issn>1089-7666</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkE1LAzEYhIMoWKsH_0HAk4etyZuP3RylqC0UvOg5pNmsm7ZuapJt6b_vlhY8zTA8DMMg9EjJhBLJXuiEKwBJ2RUaUVKpopRSXp98SQopGb1FdymtCCFMgRyh2bzLLhqbfehwaLDBe2fWOLXBrvHe7Bze-9wOce2TDV32XR_6hFtndofixyRsDxvf1S7eo5vGbJJ7uOgYfb-_fU1nxeLzYz59XRQWKpELwQVxxoiGVUtWWS4EWG7qCkAQoHLJa8WIYsqJUjJumRM1GNVUJa_NsiQNG6Onc29I2etkfXa2HZZ1zmYNwAkDJv-pbQx_vUtZr0Ifu2GYBgq85JRQNVDPZ8rGkFJ0jd5G_2viQVOiT3dqqi93siNSKmTa</recordid><startdate>20150601</startdate><enddate>20150601</enddate><creator>Wang, Xiansheng</creator><creator>Yang, Dangguo</creator><creator>Wu, Junqiang</creator><creator>Luo, Xisheng</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20150601</creationdate><title>Interaction of a weak shock wave with a discontinuous heavy-gas cylinder</title><author>Wang, Xiansheng ; Yang, Dangguo ; Wu, Junqiang ; Luo, Xisheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c285t-5450eaa5f38b38c4552c4ad82250216b4d930939e57634c3e5d2a9f874dab70f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Aerodynamics</topic><topic>AIR</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>CYLINDRICAL CONFIGURATION</topic><topic>DISTURBANCES</topic><topic>ENGINEERING</topic><topic>Fluid dynamics</topic><topic>GAS CYLINDERS</topic><topic>Inhomogeneity</topic><topic>INTERACTIONS</topic><topic>INTERFACES</topic><topic>Low pressure</topic><topic>Mathematical models</topic><topic>NONLINEAR PROBLEMS</topic><topic>PHOTOGRAPHY</topic><topic>Physics</topic><topic>PRESSURE RANGE PA</topic><topic>Schlieren photography</topic><topic>SHOCK TUBES</topic><topic>SHOCK WAVES</topic><topic>SOAPS</topic><topic>SULFUR FLUORIDES</topic><topic>SYMMETRY</topic><topic>THIN FILMS</topic><topic>VORTICES</topic><topic>Wave diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Xiansheng</creatorcontrib><creatorcontrib>Yang, Dangguo</creatorcontrib><creatorcontrib>Wu, Junqiang</creatorcontrib><creatorcontrib>Luo, Xisheng</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Physics of fluids (1994)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Xiansheng</au><au>Yang, Dangguo</au><au>Wu, Junqiang</au><au>Luo, Xisheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interaction of a weak shock wave with a discontinuous heavy-gas cylinder</atitle><jtitle>Physics of fluids (1994)</jtitle><date>2015-06-01</date><risdate>2015</risdate><volume>27</volume><issue>6</issue><issn>1070-6631</issn><eissn>1089-7666</eissn><abstract>The interaction between a cylindrical inhomogeneity and a weak planar shock wave is investigated experimentally and numerically, and special attention is given to the wave patterns and vortex dynamics in this scenario. A soap-film technique is realized to generate a well-controlled discontinuous cylinder (SF6 surrounded by air) with no supports or wires in the shock-tube experiment. The symmetric evolving interfaces and few disturbance waves are observed in a high-speed schlieren photography. Numerical simulations are also carried out for a detailed analysis. The refracted shock wave inside the cylinder is perturbed by the diffracted shock waves and divided into three branches. When these shock branches collide, the shock focusing occurs. A nonlinear model is then proposed to elucidate effects of the wave patterns on the evolution of the cylinder. A distinct vortex pair is gradually developing during the shock-cylinder interaction. The numerical results show that a low pressure region appears at the vortex core. Subsequently, the ambient fluid is entrained into the vortices which are expanding at the same time. Based on the relation between the vortex motion and the circulation, several theoretical models of circulation in the literature are then checked by the experimental and numerical results. Most of these theoretical circulation models provide a reasonably good prediction of the vortex motion in the present configuration.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4922613</doi></addata></record> |
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source | American Institute of Physics (AIP) Journals; Alma/SFX Local Collection |
subjects | Aerodynamics AIR CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Computational fluid dynamics Computer simulation CYLINDRICAL CONFIGURATION DISTURBANCES ENGINEERING Fluid dynamics GAS CYLINDERS Inhomogeneity INTERACTIONS INTERFACES Low pressure Mathematical models NONLINEAR PROBLEMS PHOTOGRAPHY Physics PRESSURE RANGE PA Schlieren photography SHOCK TUBES SHOCK WAVES SOAPS SULFUR FLUORIDES SYMMETRY THIN FILMS VORTICES Wave diffraction |
title | Interaction of a weak shock wave with a discontinuous heavy-gas cylinder |
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