Pressure Pulsation Caused by the Interaction between the Perforated Plate Installed in a Pipe and the Fluid

安装在管道中的多孔板与流体相互作用引起的压力脉动

• 批准号: 13650197
• 负责人: SANO Masashi
• 金额: $ 1.86万
• 依托单位: Shizuoka Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650197/
• 关键词: Flow-Induced Vibration; Self-Excited Vibration; Lock-in; Natural Frequency; Perforated Plate; Lateral Vibration; Vortex Shedding; Interaction; 液体関連振動

The pressure fluctuations accompanying the occurrence of lock-in caused by the vortex shedding from the perforated plate were examined experimentally. The results are summarized as follows:(1) When the lock-in occurs, the in-phase lateral vibration, (0,0) mode, of the perforated plate is generated. The plate displacement has a slight phase lag with respect to the differential pressure across the plate(2) The amplitudes and phases of pressure fluctuation along the pipe agree well with that calculated using continuity. Equation at the plate location under the non-cavitationg condition(3) During the cavitation occurrence the amplitudes and phases of pressure fluctuation deviate from the values for the non-cavitation, while the lock-in frequencies decrease gradually with increasing velocity(4) Natural frequency, 3750Hz, for (0,0) mode lateral vibration of the perforated plate is larger than the lock-in frequencies in this study(5) The lock-in phenomena is caused by the lateral vibration of the perforated plate due to the differential pressure fluctuation across the plate when the vortex-shedding frequencies agree with the natural frequencies of the liquid column, or the pressure loop is located at the just before or after the plate

本文对孔板涡脱落引起的闭锁现象进行了实验研究。结果表明：（1）当发生锁定时，多孔板产生同相横向振动，即（0，0）模态。板位移相对于跨板压差有微小的相位滞后。（2）沿管道沿着的压力波动的幅值和相位与用连续性方法计算的结果吻合较好。（3）在空化发生过程中，压力脉动的幅值和相位均偏离无空化时的值，而锁定频率随流速的增加而逐渐减小。（4）在（0，0）模态的横向振动大于本研究中的锁定频率。（5）锁定频率的计算结果表明：现象是由多孔板的横向振动引起的，该横向振动是由于当涡流-脱落频率与液柱的固有频率一致，或者压力环位于板的前或后

项目成果

佐野勝志: "管内多孔板からの渦放出に伴う圧力脈動 (キャビテーション発生時の挙動)"日本機械学会2001年度年次大会講演論文集Vol V. No.01-1. 143-144 (2001)

佐野克志：“与管道中穿孔板的涡流放电相关的压力脉动（发生气蚀时的行为）”日本机械工程学会 2001 年年会论文集第 V 卷第 143-144 号（ 2001）

SANO, M.: "Pressure Pulsation Caused by Vortex Shedding from a Perforated Plate with Holes (Behavior during the Occurrence of Cavitation)"Preprint of 2001 JSME Annual Meeting (in Japanese). V, No.01-1. 43-144 (2001)

SANO, M.：“带孔穿孔板涡流脱落引起的压力脉动（空化发生期间的行为）”2001 年 JSME 年会预印本（日文）。

SANO, M.: "Pressure Pulsation Caused by Vortex Shedding from a Perforated Plate with Holes (Pressure Modes in a Pipe during the Occurrence of Lock-in)"Trans. Jpn. Soc. Mech. Eng. (in Japanese), Ser. B. 68, No.670. 1701-1707 (2002)

SANO，M.：“带孔穿孔板涡流脱落引起的压力脉动（锁定发生期间管道中的压力模式）”Trans。

佐野勝志: "管内多孔板からの渦放出に伴う圧力脈動 (ロックイン発生時の管内変動圧力モード)"日本機械学会論文集(C編). 68巻670号. 1701-1707 (2002)

Katsushi Sano：“与管道中穿孔板的涡流脱落相关的压力脉动（发生锁定时管道中的波动压力模式）”日本机械工程师学会汇刊（ed.C），第 68 卷。 . 670. 1701-1707 (2002)

佐野 勝志: "管内多孔板からの渦放出に伴う圧力脈動(ロックイン発生時の管内変動圧力モード)"日本機械学会論文集(C編). 68巻670号. 1701-1707 (2002)

Katsushi Sano：“与管道中穿孔板的涡流排放相关的压力脉动（发生锁定时管道中的波动压力模式）”日本机械工程师学会汇刊（ed.C），第 68 卷。 . 670. 1701-1707 (2002)