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

实验检查了伴随着由穿孔板的涡旋脱落引起的锁定发生的压力波动。结果总结如下：（1）当发生锁定时，产生了穿孔板的相相内侧振动（0,0）模式。板位移相对于整个板上的差压力具有轻微的相位滞后（2）沿管道的压力波动的幅度和相位与使用连续性计算的相一致。在空化发生期间，在非狂热条件下（3）处的板位置的方程式在压力波动的幅度和阶段偏离了非浪费的值，而锁定频率逐渐降低，随着速度的增加（4）固有频率，3750Hz的速度（4）固有频率为3750Hz，比（0,0,0）的锁定板更大的锁定板，是锁定的5）。现象是由于涡流隔离频率与液体柱的固有频率一致的，由于板横穿板的差异波动引起的穿孔板的横向振动引起的现象是引起的，或者压力环位于板前或之后。

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: "管内多孔板の渦放出に伴う圧力脈動(キャピ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)

Katsushi Sano：“与管道中穿孔板的涡流脱落相关的压力脉动（发生头顶时的行为）”日本机械工程师学会 2001 年年会记录第 01-144 卷。 (2001)

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)