설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제17권1호
  • /
  • Pages.8-15
  • /
  • 2005
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  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

뉴튼 및 비뉴튼 유체의 헬리컬 유동에 관한 연구

A Study on the Helical Flow of Newtonian and non-Newtonian fluid

  • 김영주 (성균관대학교 기계기술연구소) ;
  • 김철수 (원주대 자동차서비스과) ;
  • 황영규 (성균관대학교 기계공학부)
  • Kim Young-Ju (Graduated School of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim Chul-Soo (Automotive service and Technology Wonju National College) ;
  • Hwang Young-Kyu (Graduated School of Mechanical Engineering, Sungkyunkwan University)
  • 발행 : 2005.01.01
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초록

This study concerns the characteristics of helical flow in a concentric and eccentric annulus with a diameter ratio of 0.52 and 0.9, whose outer cylinders are stationary and inner ones are rotating. Pressure losses and skin friction coefficients have been measured for fully developed flows of water and $0.2\%$ aqueous of sodium carboxymethyl cellulose(CMC), respectively, when the inner cylinder rotates at the speed of $0\~500$ rpm. The effect of rotation on the skin friction coefficient is significantly dependent on the flow regime. In all flow regimes, the skin friction coefficient is increased by the inner cylinder rotation. This study shows the change of skin friction coefficient and wall shear stress corresponding to the variation of rotating speed of the inner cylinder, radius ratio, eccentricity, and working fluids.

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참고문헌

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