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research-article

Development of venturi-tube with spiral-shaped fin for water treatment

[+] Author and Article Information
Dong Ho Shin

Center for Urban Energy Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792 South Korea
shindh@kist.re.kr

Yeonghyeon Gim

School of Mechanical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, South Korea
mpmpmpp6@gmail.com

Dong Kee Sohn

School of Mechanical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, South Korea
dksohn@skku.edu

Han Seo Ko

School of Mechanical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, South Korea
hanseoko@skku.edu

1Corresponding author.

ASME doi:10.1115/1.4042750 History: Received April 13, 2018; Revised January 31, 2019

Abstract

Detailed numerical data were presented for the development of a venturi-type water purifier which had a cavitation nozzle to enhance turbulent kinetic energy and vapor volume fraction. Numerical analysis for cavitation was conducted in multi-phase flow using the software, CFX. The numerical method used in this study was verified by the experimental data of pressure distribution in tube and the observation of cavitation from previous studies. From the result of the numerical analysis, a logarithm relation between the vapor volume fraction and volume flow rate of water according to the area ratio between the throat and the entrance of a venturi-tube was derived. In addition, spiral-shaped fins were developed to enhance the turbulent kinetic energy in the body of a venturi-tube. Thus, it was confirmed that the volume fraction and turbulent kinetic energy of the developed water purifier were enhanced compared with the normal venturi-tube without the spiral-shaped fin. Finally, the improved water treatment performance of the advanced design of the venturi-tube was confirmed by the removal test of algal and the representative solutions.

Copyright (c) 2019 by ASME
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