Oscillation modes of supersonic multijets exhausting from very adjacent multiple nozzles
The oscillation modes of a supersonic circular twin jet and multijet with square configuration where the center-to-center spacing of nozzles was fixed to 1.4 times the nozzle diameter were investigated experimentally. It is found that the twin jet oscillates simultaneously in three different oscilla...
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| Veröffentlicht in: | The Journal of the Acoustical Society of America 2001-10, Vol.110 (4), p.1873-1877 |
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| container_title | The Journal of the Acoustical Society of America |
| container_volume | 110 |
| creator | Umeda, Y Ishii, R |
| description | The oscillation modes of a supersonic circular twin jet and multijet with square configuration where the center-to-center spacing of nozzles was fixed to 1.4 times the nozzle diameter were investigated experimentally. It is found that the twin jet oscillates simultaneously in three different oscillation modes for the pressure ratios of about 4.1. From the acoustical observation, these oscillation modes are identified as one lateral oscillation mode perpendicular to a plane composed of the twin jet axes and two lateral oscillation modes parallel to this plane. For a multijet with a square configuration, only one lateral oscillation mode was observed. In this case, it is observed that when the spacing between two facing sides of the square formed by four jets is stretched, the spacing between the other two sides shrinks and vice versa. |
| doi_str_mv | 10.1121/1.1404380 |
| format | Article |
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It is found that the twin jet oscillates simultaneously in three different oscillation modes for the pressure ratios of about 4.1. From the acoustical observation, these oscillation modes are identified as one lateral oscillation mode perpendicular to a plane composed of the twin jet axes and two lateral oscillation modes parallel to this plane. For a multijet with a square configuration, only one lateral oscillation mode was observed. In this case, it is observed that when the spacing between two facing sides of the square formed by four jets is stretched, the spacing between the other two sides shrinks and vice versa.</description><identifier>ISSN: 0001-4966</identifier><identifier>EISSN: 1520-8524</identifier><identifier>DOI: 10.1121/1.1404380</identifier><identifier>PMID: 11681368</identifier><language>eng</language><publisher>United States</publisher><ispartof>The Journal of the Acoustical Society of America, 2001-10, Vol.110 (4), p.1873-1877</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c347t-d02852d0d519dbfb0718830fc3d0a9e75ff744a2ecbd8af2e79ff4f0bacd00873</citedby><cites>FETCH-LOGICAL-c347t-d02852d0d519dbfb0718830fc3d0a9e75ff744a2ecbd8af2e79ff4f0bacd00873</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>207,208,314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11681368$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Umeda, Y</creatorcontrib><creatorcontrib>Ishii, R</creatorcontrib><title>Oscillation modes of supersonic multijets exhausting from very adjacent multiple nozzles</title><title>The Journal of the Acoustical Society of America</title><addtitle>J Acoust Soc Am</addtitle><description>The oscillation modes of a supersonic circular twin jet and multijet with square configuration where the center-to-center spacing of nozzles was fixed to 1.4 times the nozzle diameter were investigated experimentally. 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It is found that the twin jet oscillates simultaneously in three different oscillation modes for the pressure ratios of about 4.1. From the acoustical observation, these oscillation modes are identified as one lateral oscillation mode perpendicular to a plane composed of the twin jet axes and two lateral oscillation modes parallel to this plane. For a multijet with a square configuration, only one lateral oscillation mode was observed. In this case, it is observed that when the spacing between two facing sides of the square formed by four jets is stretched, the spacing between the other two sides shrinks and vice versa.</abstract><cop>United States</cop><pmid>11681368</pmid><doi>10.1121/1.1404380</doi><tpages>5</tpages></addata></record> |
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| ispartof | The Journal of the Acoustical Society of America, 2001-10, Vol.110 (4), p.1873-1877 |
| issn | 0001-4966 1520-8524 |
| language | eng |
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| source | AIP Journals (American Institute of Physics); AIP Acoustical Society of America |
| title | Oscillation modes of supersonic multijets exhausting from very adjacent multiple nozzles |
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