Journal of Ship and Ocean Technology

The Society of Naval Architects of Korea (대한조선학회)
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An Experimental Study on Friction Reduction by Additives in a Water Channel

  • Kim Wu-Joan (Dept. of Naval Architecture & Marine Engineering, Mokpo National Univ.) ;
  • Kim Hyoung-Tae (Dept. of Naval Architecture & Ocean Engineering, Chungnam National Univ.)
  • Published : 2005.03.01
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Abstract

An experimental study has been carried out as a basic research for the development of the friction drag reduction technology for water-borne vehicles by injecting microbubbles or polymer solution. Experimental apparatus and procedures have been devised and prepared to measure the changes of the wall friction with the injection of additives and the basic experimental data on friction drag reduction are obtained for fully developed channel flows. The effects of key controlling parameters were investigated for higher drag reduction with varying the concentration and the injection rate of additives. The frictional drag has been reduced up to $25\%$ with the microbubble injection and $50\%$ with the polymer solution injection.

Keywords

References

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