한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제16권4호
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  • Pages.1-6
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  • 2002
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지

중합제 첨가에 의한 항력 감소 효과에 관한 실험적 연구

Experimental Investigation of Drag Reduction by Polymer Additives

  • 발행 : 2002.08.01
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초록

Experimental investigation of drag reduction by adding a polymer additive(polyacrylamid, N-401P) into water is carried out in a Circular Water Channel. The effect of viscosity, surface roughness and degradation as a function of running time is also measured with varying the concentration of polymer additives(20ppm,100ppm) and Reynolds numbers. Near and far wakes past a circular cylinder are observed by LDV. Drag forces are measured with a strain-gaged device. The experimental results show that around 5%-30% of drag reduction with the polymer solution are observed. The larger effects of drag reduction can be found at low range of Reynolds number, more roughened surface cylinder. The effect of polymer solution for near wakes is larger than for far wakes.

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참고문헌

  1. Univ. of Glasgow, Dept. of Naval Architecture Experiment Tank Report No 8 Amflilokhiev, W.B.;Ferguson, A.M.
  2. J. Fluid Mech. v.47 A Tracer Dispersion Study of the Drag - Reduction Effect in a Turbulent Pipe Flow Bryson, A.W.;Arunachalam, V.R.;Fulford, G.D. https://doi.org/10.1017/S0022112071001010
  3. J. of SNAK v.26 no.3 Turbulent Flow Measurements by Laser Velocimeter in Circulation Water Channel Choi, E.S.;Sung, H.J.;Kwon, J.H.
  4. Ph. D. Dissertation, University of Strathclyde Study in Friction Reduction with Dilute Polymer Solutions Dunlop, E.H.
  5. Fluid-Dynamic Drag, Practical Information on Aerodynamic Drag and Hydrodynamic Resistance Hoerner, S.F.
  6. J. Fluid Mech. v.57 The Laminar Flow of Dilute Ploymer Solution James, D.F.;Acosta, A.J. https://doi.org/10.1017/S0022112073001102
  7. Phys. Fluids v.1 The Effect of Polymer Additives on Laminar Seperation Kim, B.K.;Telionis, D.P. https://doi.org/10.1063/1.857442
  8. J. Polym. Sci. Macromol. Rev. v.7 Drag Reduction in Turbulent Flow by Polymer Additives Lumley, J.L. https://doi.org/10.1002/pol.1973.230070104
  9. Ann. Rev. Fluid Mech. v.1 Drag Reduction by Additives Lumley, J.L. https://doi.org/10.1146/annurev.fl.01.010169.002055
  10. J. Fluid Mech. v.57 Flow of Dilute Polymer Solution about Circular Cylinder Sarpkaya, T.;Rainey, P.G.;Kell, R.E. https://doi.org/10.1017/S0022112073001102
  11. Fluid Mechanics Streeter, V.L.;Wylie, E.B.
  12. A First Course in Tubulence Tennekes, H.;Lumely, J.L.
  13. A.I.Ch.E.J. v.21 Drag Reduction Fundmentals Virk, P.S. https://doi.org/10.1002/aic.690210402