Flow Estimation by Flow Induced Vibration of Bluff Bodies
Publish place: Journal of Applied Fluid Mechanics، Vol: 15، Issue: 5
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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JR_JAFM-15-5_014
تاریخ نمایه سازی: 13 تیر 1401
Abstract:
The study confirms the feasibility of using information from flow-induced vibration generated by bluff bodies for measurement of flow. The proposed methodology is based on experiments conducted for recording acceleration signals from vibration sensors embedded along with bluff bodies in cross flow. The studies were undertaken in a wide Reynolds number range of ۴۷۰۰ to ۵.۶۵۵x۱۰۵, with five different geometries of bluff bodies for shape optimization. Resonance and vortex shedding frequencies of samples are determined experimentally. The recorded acceleration signals are analysed using three different techniques such as frequency shift method, resonance amplitude method and overall acceleration estimation method. In this, the frequency shift method shows correlation at low flow velocities. In the resonance amplitude method and overall acceleration method, acceleration levels show a cubic relation with the flow rate. In the resonance amplitude method, obtained R۲ values are from ۰.۹۳ to ۰.۹۹. Overall acceleration estimation method has shown better correlation with flow rate and its R۲ values were above ۰.۹۹. The study confirms that application of all three methods together yields reasonably good estimation for a wide range of flow.
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Authors
A. Tamil Chandran
Fluid Control Research Institute, Palakkad, Kerala- ۶۷۸۶۲۳, India
T. Suthakar
Department of Mechanical Engineering, National Institute of Technology- Trichirapallai, Tamil Nadu, India
K. R. Balasubramanian
Department of Mechanical Engineering, National Institute of Technology- Trichirapallai, Tamil Nadu, India
S. Rammohan
Fluid Control Research Institute, Palakkad, Kerala- ۶۷۸۶۲۳, India