공업화학 (Applied Chemistry for Engineering)

  • 제16권5호
  • /
  • Pages.698-704
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  • 2005
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  • 1225-0112(pISSN)
  • /
  • 2288-4505(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
권호 표지

여러 가지 교반조에서 Paddle 임펠러의 교반소요동력 특성

Characteristic of Power Consumption for Paddle Impeller in Various Agitated Vessels

  • 이영세 (상주대학교 응용화학공학부) ;
  • Lee, Young Sei (School of Applied Chemical Engineering, Sangju National University) ;
  • Kato, Yoshihito (Department of Life & Material Engineering, Nagoya Institute of Technology)
  • 투고 : 2005.07.11
  • 심사 : 2005.08.04
  • 발행 : 2005.10.10
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초록

구형교반조 및 원통교반조에서 paddle 임펠러의 교반소요동력을 넓은 범위의 레이놀즈수 영역에서 측정하였다. 구형교반조는 교반조 높이가 직경과 같고, 구형교반조의 체적과 같은 원통교반조의 겉보기 직경을 이용하여 구형교반조 및 원통교반조 모두에 적용할 수 있는 교반소요동력 상관식을 구했다. 이 상관식은 Nagata 등 및 Hixson 등의 실험결과에도 양호하게 상관되었다. 또한 임계레이놀즈수는 본 상관식에서 얻은 층류영역에서 난류영역으로의 전이에 관한 계수 $C_{tr}$에 잘 상관되었다.

Power consumption for paddle impeller in spherical and cylindrical agitated vessel was measured over a wide range of Reynolds number from laminar to turbulent flow regions. The power correlation was obtained for both spherical and cylindrical vessels, where the apparent diameter of the spherical vessel was equal to the diameter of the cylindrical vessel (height equal to its diameter and had the same volume as the spherical vessel). The power consumption well correlated with the experimental results of Nagata, et al. and Hixson-Baum. Also the critical Reynolds numbers was directly related to the transition coefficient $C_{tr}$ characterizing the transition from a laminar to a turbulent flow region in the correlation proposed here.

키워드

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