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An Experimental Study on the Flow-rate and Velocity Profile of Air Flow in the Smooth Pipe

매끈한 관내 공기유동에서 유량과 속도분포에 관한 실험적 연구

  • 박상언 (인천시립전문대학 기계과)
  • Published : 2002.12.01

Abstract

Experimental study was conducted to obtain the air velocity profiles in turbulent pipe flow. The acrylic smooth pipe (${\phi}=80mm$) was used for the test section of the flow loop. It was known that the velocity profiles of turbulent flow were different with Reynolds numbers and the viscous sublayer was usually quite thin. The following conclusions were drawn from the experimental investigations. Maximum velocity of the pipe center and flow-rate are useful for the duct design on the spot. The velocity profiles of high Reynolds number was flatter than those of low Reynolds number. It was known that the exponent, n, for power-law velocity profiles was $6{\sim}9$ depending on Reynolds number ranging from $10^4$ to $10^5$ in the turbulent flow, However, in this experiment study, it was $9{\sim}14$ depending on Reynolds number ranging from 17,000 to 123,727 in the turbulent flow, and $1.7{\sim}3.5$ depending on Reynolds number ranging from 2,442 to 4,564 in the transition region.

Keywords

References

  1. 인천전문대학 논문집 v.27 매끈한 관내 공기의 난류유동에서 속도분포에 관한 실험적 연구 박상언
  2. Fundamentals of Fluid Mechanics Bruce, R. M.;Donald, F. Y.;Theodore, H. O.
  3. 유체역학 ハンドブツク
  4. 기술자료 일본기계학회
  5. Applied Fluid Mechanics Philip, M. G.;Richard, J. G.;John, I. H.
  6. Applied Fluid Mechanics Robert L. M.
  7. 한국공업규격 송풍기의 시험 및 검사방법
  8. 표준유체역학 윤재복;서상호;박상언
  9. Introduction to Fluid Mechanics Fay, J. A.
  10. Boundary Layer Theory Schlichting, H.
  11. Numerical Lecipes in Fortran, the Art of Scientific Computing (2nd Ed.)