Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on Destratification System Using Bubble Plume: Dimensional Analysis and Design Methodology

버블 플룸을 이용한 탈성층의 평가: 차원해석 및 설계방법론의 제시

  • 김성훈 (한국과학기술원 건설 및 환경공학과) ;
  • 김재윤 (한국과학기술원 건설 및 환경공학과) ;
  • 박희경 (한국과학기술원 건설 및 환경공학과)
  • Received : 2005.11.04
  • Accepted : 2005.12.13
  • Published : 2005.12.15
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Abstract

In this study, we derived a new non-dimensional variable including bubble size and air diffusing area by Buckingham's theorem for making a practical correlation with experimental results. Firstly, we drew a relationship between a non-dimensional variable, $NH/u_s$, which has a form of Froude number and destratification efficiency with a simple theoretical consideration. Then we derived two non-dimensional variables by Buckingham's ${\pi}$-theorem and equating them with a form of $Fr_N$ for making single parameter to correlate overall destratification efficiency. As the result, the single parameter Be number shows a correlations with destratification efficiencies obtained from laboratory and pilot experiments. Also, for the practical applications, we conducted multiple regression analysis using Be and tank area to make predictive equations about destratification efficiency. The result also shows a successful correlations with destratification efficiency ($R^2$>0.9, p<0.001). Using this equation, we proposed a new design methodology with respect to bubble diffusing area.

Keywords

Acknowledgement

Supported by : 수자원

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