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

实验研究了穿孔板涡脱落引起的闭锁过程中产生的压力波动。研究结果表明：(1)当发生闭锁时，孔板产生(0，0)振型的同相横向振动。平板位移相对于平板上的压差有轻微的相位滞后。(2)压力脉动沿管道的幅值和相位与用连续性计算的结果吻合较好。非空化条件下的板位移方程(3)空化过程中，压力脉动的幅值和相位与非空化时的值发生偏离，而锁定频率则随速度的增加而逐渐减小。(4)固有频率3750赫兹，因为本研究中穿孔板的(0，0)型横向振动大于锁定频率。(5)当涡脱频率与液柱固有频率一致时，穿孔板的横向振动是由于穿孔板的压差波动引起的。或者压力环恰好位于板的前面或后面

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)