Study on Hydrodynamic Vibration in Dual Bluff Body Vortex Flowmeter

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Study on Hydrodynamic Vibration in Dual Bluff Body Vortex Flowmeter

FU Xin; YANG Huayong

State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou
310027, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-06-28 Published:2001-06-28
Contact: FU Xin

非流线型双绕柱旋涡流量计流体振动特性的研究

傅新; 杨华勇

State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou
310027, China

通讯作者: 傅新

Abstract

Abstract: The characteristics of the dual bluff body vortex shedding is investigated, and the
possibility to use dual bluff body combinations to strengthen the hydrodynamic vibration
around the bluff body objects is explored. The numerical and experimental approaches were
utilized to examine the time dependent flow field and the pressure oscillation around the
bluff bodies. The numerical data were obtained by the advanced large eddy simulation model.
The experiment was conducted on a laboratory scale of Karman vortex flowmeter with 40 mm
diameter. It is revealed that the optimized dual bluff body combinations strengthened the
hydrodynamic vibration. It was also found that the hydrodynamic vibration with 180° phase
difference occurred at the axisymmetric points of circular pipe on the lateral faces of the
equilateral triangle-section bluff bodies. Using the dual bluff body configuration and the
differential sensing technique, a novel prototype of vortex flowmeter with excellent noise
immunity and improved sensibility was developed.

Key words: flowmeter, vortex shedding, dual bluff body, hydrodynamic vibration

摘要： The characteristics of the dual bluff body vortex shedding is investigated, and the
possibility to use dual bluff body combinations to strengthen the hydrodynamic vibration
around the bluff body objects is explored. The numerical and experimental approaches were
utilized to examine the time dependent flow field and the pressure oscillation around the
bluff bodies. The numerical data were obtained by the advanced large eddy simulation model.
The experiment was conducted on a laboratory scale of Karman vortex flowmeter with 40 mm
diameter. It is revealed that the optimized dual bluff body combinations strengthened the
hydrodynamic vibration. It was also found that the hydrodynamic vibration with 180° phase
difference occurred at the axisymmetric points of circular pipe on the lateral faces of the
equilateral triangle-section bluff bodies. Using the dual bluff body configuration and the
differential sensing technique, a novel prototype of vortex flowmeter with excellent noise
immunity and improved sensibility was developed.

关键词: flowmeter;vortex shedding;dual bluff body;hydrodynamic vibration

FU Xin, YANG Huayong. Study on Hydrodynamic Vibration in Dual Bluff Body Vortex Flowmeter[J]. .

傅新, 杨华勇. 非流线型双绕柱旋涡流量计流体振动特性的研究[J]. CIESC Journal.

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