Calibration of Water Velocity Profile in Circular Water Channel Using Particle Image Velocimetry

doi:2011.25.4.23

J. Ocean Eng. Technol. > Volume 25(4); 2011 > Article

J. Ocean Eng. Technol. 2011;25(4):23-27.
DOI: https://doi.org/10.5574/KSOE.2011.25.4.023

Suh Sung-Bu,Jung Kwang-Hyo

Development of Naval Architecture and Ocean Engineering Dong-Eui University,Development of Naval Architecture and Ocean Engineering Dong-Eui University

PIV를 이용한 회류수조의 유속 분포 교정에 관한 연구

서성부,정광효

동의대학교 조선해양공학과,동의대학교 조선해양공학과

Keywords: Circulating water channel, Surface flow accelerator, Particte image velocimetry(PIV), Velocity uniformity, Turbulence intensity

핵심용어: 회류수조, 표면유동가속장치, 입자속도 측정법, 유속균일성, 난류강도

Abstract

This experimental study was performed to find rpms of the impeller and the surface flow accelerator to make a uniform velocity vertical distribution in the circular water channel. PIV technique was employed to measure the water velocity profiles into the water depth from the free surface. The number of instantaneous velocity profiles was decomposed into mean and turbulence velocity components, and the distribution of velocity fluctuation and turbulence intensity were computed for each experimental condition. From these results, the velocity uniformity was quantitatively determined to present the flow quality in the measuring section of the circular water channel. It has been shown that the proper operation of the surface flow accelerator would make the uniform velocity profiles and reduce the velocity fluctuation near the free surface.