Study on water-vapor two-phase flow behavior in Venturi tube
The filtered venting system has the functions of preventing the overpressure breakage of a primary containment vessel of a reactor and reducing the release amount of the radioactive materials to the environment. One of the filtered venting systems is a Venturi scrubber to remove small particles of t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2018-01-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00392/_pdf/-char/en |
| _version_ | 1811317777587240960 |
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| author | Shinichiro UESAWA Naoki HORIGUCHI Mitsuhiko SHIBATA Hiroyuki YOSHIDA |
| author_facet | Shinichiro UESAWA Naoki HORIGUCHI Mitsuhiko SHIBATA Hiroyuki YOSHIDA |
| author_sort | Shinichiro UESAWA |
| collection | DOAJ |
| description | The filtered venting system has the functions of preventing the overpressure breakage of a primary containment vessel of a reactor and reducing the release amount of the radioactive materials to the environment. One of the filtered venting systems is a Venturi scrubber to remove small particles of the radioactive materials. However, the physics of the two-phase flow in the Venturi scrubber has not been clarified. In this study, the experimental results of the water-vapor two-phase flow in a Venturi tube are reported. As the gas flow rate increased, the supply amount of scrubbing water decreased and eventually stopped because the pressure at the throat increased with increasing the gas density. This phenomenon was caused by the gas compressibility. By visualizing the two-phase flow in the Venturi tube, we cannot measure the spraying from the water supply port, which is considered to affect decontamination of the Venturi scrubber. However, it was confirmed that the water film on the wall at the diverging part of the Venturi tube, and the dispersed water droplets were formed intermittently from the water film. In addition, generation of the liquid at the divergent area was observed even though scrubbing water-supply stopped. |
| first_indexed | 2024-04-13T12:14:15Z |
| format | Article |
| id | doaj.art-d5acb9be46394e1ea267ce16c20dd69b |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T12:14:15Z |
| publishDate | 2018-01-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-d5acb9be46394e1ea267ce16c20dd69b2022-12-22T02:47:24ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-01-018485917-0039217-0039210.1299/transjsme.17-00392transjsmeStudy on water-vapor two-phase flow behavior in Venturi tubeShinichiro UESAWA0Naoki HORIGUCHI1Mitsuhiko SHIBATA2Hiroyuki YOSHIDA3Japan Atomic Energy AgencyJapan Atomic Energy AgencyJapan Atomic Energy AgencyJapan Atomic Energy AgencyThe filtered venting system has the functions of preventing the overpressure breakage of a primary containment vessel of a reactor and reducing the release amount of the radioactive materials to the environment. One of the filtered venting systems is a Venturi scrubber to remove small particles of the radioactive materials. However, the physics of the two-phase flow in the Venturi scrubber has not been clarified. In this study, the experimental results of the water-vapor two-phase flow in a Venturi tube are reported. As the gas flow rate increased, the supply amount of scrubbing water decreased and eventually stopped because the pressure at the throat increased with increasing the gas density. This phenomenon was caused by the gas compressibility. By visualizing the two-phase flow in the Venturi tube, we cannot measure the spraying from the water supply port, which is considered to affect decontamination of the Venturi scrubber. However, it was confirmed that the water film on the wall at the diverging part of the Venturi tube, and the dispersed water droplets were formed intermittently from the water film. In addition, generation of the liquid at the divergent area was observed even though scrubbing water-supply stopped.https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00392/_pdf/-char/enventuri scrubberexperimenttwo-phase flowvaporcompressible fluid |
| spellingShingle | Shinichiro UESAWA Naoki HORIGUCHI Mitsuhiko SHIBATA Hiroyuki YOSHIDA Study on water-vapor two-phase flow behavior in Venturi tube Nihon Kikai Gakkai ronbunshu venturi scrubber experiment two-phase flow vapor compressible fluid |
| title | Study on water-vapor two-phase flow behavior in Venturi tube |
| title_full | Study on water-vapor two-phase flow behavior in Venturi tube |
| title_fullStr | Study on water-vapor two-phase flow behavior in Venturi tube |
| title_full_unstemmed | Study on water-vapor two-phase flow behavior in Venturi tube |
| title_short | Study on water-vapor two-phase flow behavior in Venturi tube |
| title_sort | study on water vapor two phase flow behavior in venturi tube |
| topic | venturi scrubber experiment two-phase flow vapor compressible fluid |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00392/_pdf/-char/en |
| work_keys_str_mv | AT shinichirouesawa studyonwatervaportwophaseflowbehaviorinventuritube AT naokihoriguchi studyonwatervaportwophaseflowbehaviorinventuritube AT mitsuhikoshibata studyonwatervaportwophaseflowbehaviorinventuritube AT hiroyukiyoshida studyonwatervaportwophaseflowbehaviorinventuritube |