TY - JOUR
A2 - Yang, Yan
AU - Wada, Sanehiro
AU - Tezuka, Kenichi
AU - Treenuson, Weerachon
AU - Tsuzuki,
Nobuyushi
AU - Kikura, Hiroshige
PY - 2012
DA - 2012/11/20
TI - Study on the Optimal Number of Transducers for Pipe Flow Rate Measurement Downstream of a Single Elbow Using the Ultrasonic Velocity Profile Method
SP - 464313
VL - 2012
AB - This paper presents a new estimation method to determine the optimal number of transducers using an Ultrasonic Velocity Profile (UVP) for accurate flow rate measurement downstream of a single elbow. Since UVP can measure velocity profiles over a pipe diameter and calculate the flow rate by integrating these velocity profiles, it is also expected to obtain an accurate flow rate using multiple transducers under nondeveloped flow conditions formed downstream of an elbow. The new estimation method employs a wave number of velocity profile fluctuations along a circle on a pipe cross-section using Fast Fourier Transform (FFT). The optimal number of transducers is estimated based on the sampling theorem. To evaluate this method, a preliminary experiment and numerical simulations using Computational Fluid Dynamics (CFD) are conducted. The evaluating regions of velocity profiles are located at 3 times of a pipe diameter (3D) for the experiment, and 1 and 5D for the simulations downstream of an elbow, respectively. Reynolds numbers for the experiment and simulations are set at 4×104 and 5×106, respectively. These results indicate the efficiency of this new method.
SN - 1687-6075
UR - https://doi.org/10.1155/2012/464313
DO - 10.1155/2012/464313
JF - Science and Technology of Nuclear Installations
PB - Hindawi Publishing Corporation
KW -
ER -