A Flow-Visualization Study of a Multiple Hydrofoils Duct with Particle Image Velocimetry Equipment in KIOST

Title
A Flow-Visualization Study of a Multiple Hydrofoils Duct with Particle Image Velocimetry Equipment in KIOST
Author(s)
김지훈; Patar Eben; 원보름; Tuyen Quang Le; 고진환; 김도영; 장인성
KIOST Author(s)
Kim, Do Young(김도영)Jang, In Sung(장인성)
Publication Year
2017-06-20
Abstract
Recently, a tidal current turbine has numerous attentions because it generates a sustainable and predictable renewable energy. The tidal current turbine is one of the systems that extract kinetic energy from tidal current, and there are several types of the tidal current turbine depending on its operating motion. However, most turbines have limitations to respond the chaotic current in the ocean. One of the solutions, a duct system, can be actively responsive to different magnitude and direction of the inflow. In this study, we explored the flow velocity controllability of a diffuser-type multiple hydrofoils duct by experimental and numerical flow visualization approaches. The experimental and numerical analysis were compared each other with the same speed at 0.6 m/s. When the diffuser angle is changed from 0 to 7.5 degree, the ratio of increase inside the duct is varied from 1.82 to 2.53. Also, the experimental and numerical analysis shows that the increment ratio is 1.13 and 1.07 in the same condition, respectively. Even though the conditions between the experimental and numerical analysis are somewhat different, the increment ratio inside the duct is similar each other effectively even under. In addition, we introduce the particle image velocimetry (PIV) equipment of the Korea Institute of Ocean Science and Technology (KIOST) water channel facility used in the experimental approaches as well as newly setting-up PIeral types of the tidal current turbine depending on its operating motion. However, most turbines have limitations to respond the chaotic current in the ocean. One of the solutions, a duct system, can be actively responsive to different magnitude and direction of the inflow. In this study, we explored the flow velocity controllability of a diffuser-type multiple hydrofoils duct by experimental and numerical flow visualization approaches. The experimental and numerical analysis were compared each other with the same speed at 0.6 m/s. When the diffuser angle is changed from 0 to 7.5 degree, the ratio of increase inside the duct is varied from 1.82 to 2.53. Also, the experimental and numerical analysis shows that the increment ratio is 1.13 and 1.07 in the same condition, respectively. Even though the conditions between the experimental and numerical analysis are somewhat different, the increment ratio inside the duct is similar each other effectively even under. In addition, we introduce the particle image velocimetry (PIV) equipment of the Korea Institute of Ocean Science and Technology (KIOST) water channel facility used in the experimental approaches as well as newly setting-up PI
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23931
Bibliographic Citation
The 12th International Symposium on Particle Image Velocimetry, pp.1, 2017
Publisher
The Korean Sosciety of Visualization
Type
Conference
Language
English
Publisher
The Korean Sosciety of Visualization
Related Researcher
Research Interests

Offshore structure,Underwater robotics,Marine geotechnics,해양구조물,수중로봇,해양 지반공학

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