Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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A Study on the Flow Characteristics of the Spiral Flow Nozzle with the Width Change of Annular Slit

  • Kim, T.H. (School of Mechanical Engineering, Pukyong National University) ;
  • Setoguchi, T. (School of Mechanical Engineering, Pukyong National University) ;
  • Lee, Y.W. (School of Mechanical Engineering, Pukyong National University)
  • Published : 2009.08.31
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Abstract

In comparison with previous researches fur swirling flow, the spiral flow self-generated in the spiral flow nozzle has some different characteristics. It is not needed a compulsive tangential momentum to get its velocity component and has long potential core, relatively low swirl ratio, and high focusing ability. In this study, the self-generated mechanism of the spiral flow was clarified and the effect on the width of annular slit on spiral flow characteristics was investigated experimentally and numerically. As a result, the existence of tangential velocity component regardless of a compulsive angular momentum is clarified and the results obtained by experiment have a satisfactory agreement with those by numerical method, quantitatively and qualitatively.

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References

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