Nonlinear Acoustic Theory toward a Transformation Technique from Shock Wave into Soliton by Active Control of Bubble Oscillations in Water
| Project/Area Number |
26820040
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 気泡流 / 気泡力学 / 非線形音響学 / 非線形波動 / 衝撃波 / ソリトン / 音響ソリトン / 分散性波動 / 圧力波 / プリカーサ / 非線形力学 / ベンチュリ管 / 二流体モデル |
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| Outline of Final Research Achievements |
Shock waves sometimes are observed in an inner flow of fluid machinery (e.g., pumps) and recognized as a risk factor. The aim of this study is to establish a theoretical basis of a transformation technique from shock wave into soliton that leads to suppress the damage to pumps. A fast propagation mode with the phase velocity of 1,500 m/s of pressure waves induced by the consideration of compressibility of liquid phase in liquids containing many spherical gas bubbles is focused. This attention is essential from the viewpoint of a rapid elimination of a dangerous wave in pumps. The nonlinear evolution equations were then theoretically derived via the method of multiple scales and numerically solved via a finite difference method. An experimental verification and incorporation of abovementioned results into future pumps will be carried out.
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Report
(4 results)
Research Products
(35 results)
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[Journal Article] Development of removal technology using ozone microbubble with a Venturi tube2015
Author(s)
Arai, Y., Abe, Y., Kaneko, A., Kanagawa, T., Fujimori, K. and Ike, M.
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Journal Title
Proceedings of the ASME-JSME-KSME Joint Fluids Engineering Conference
Volume: なし
Pages: 1330-1337
Related Report
Peer Reviewed
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[Journal Article] Visualization and Measurement of Jet Breakup Behavior with Interfacial Fragmentation Using LIF and PIV2014
Author(s)
Saito, S., Abe, Y., Kaneko, A., Kanagawa, T., Iwasawa, Y., Matsuo, E., Ebihara, K., Sakaba, H., Koyama, K. and Nariai, H.
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Journal Title
Proceedings of the Ninth Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety
Volume: 該当なし
Related Report
Peer Reviewed
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[Journal Article] Response Characteristic of Rising Bubble under Structure Vibration2014
Author(s)
Kato, Y., Kanagawa, T., Kaneko, A., Monji, H., Abe, Y. and Yoshida, H.
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Journal Title
Proceedings of the Ninth Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety
Volume: 該当なし
Related Report
Peer Reviewed
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