ベンチュリ管スロート部におけるキャビテーションの衝撃エネルギーに及ぼす噴射条件の影響の評価

• 星野 柊

  東北大学大学院工学研究科

• 祖山 均

  東北大学大学院工学研究科

書誌事項

タイトル別名

• Evaluation of the effect of pressure conditions on the aggressive intensity of hydrodynamic cavitation produced by a Venturi tube

抄録

For hydrodynamic cavitation produced by a Venturi tube, cavitation bubble is collapsed at downstream of a nozzle and its intensity is influenced by upstream pressure and downstream pressure. In order to investigate the effect of the upstream pressure p₁ and the downstream pressure p₂ on aggressive intensity of hydrodynamic cavitation, an experiment measuring acoustic power by an AE sensor was conducted. Relationship between pressure conditions and acoustic power P_A was studied. The higher the upstream pressure p₁, the higher the acoustic power P_A. Acoustic power had a maximum value at the upstream pressure p₁ = 1.6, 2.1, 2.6, 3.1 and 3.6 MPa. At the upstream pressure p₁ = 2.6 MPa and the downstream pressure p₂ = 0.5 MPa, the aggressive intensity of hydrodynamic cavitation increased to be 36 times larger of the value corresponding to the atmospheric downstream pressure. While the optimum downstream pressure depended on the upstream pressure, the cavitation number was nearly constant for all upstream pressures. It was concluded that increasing the downstream pressure is an effective means to increase the aggressive intensity of the hydrodynamic cavitation without increasing the input energy.

収録刊行物

• 日本機械学会論文集

  日本機械学会論文集 83 (855), 17-00400-17-00400, 2017

  一般社団法人 日本機械学会

キーワード

• Cavitation
• Shock wave
• Venturi tube
• Downstream pressure
• Energy saving

詳細情報

• CRID: 1390001205516817024
• NII論文ID: 130006219666
• DOI: 10.1299/transjsme.17-00400
• ISSN: 21879761
• Web Site: https://www.jstage.jst.go.jp/article/transjsme/83/855/83_17-00400/_pdf
• 本文言語コード: ja
• データソース種別:
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