The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Numerical Study on the Effect of Pitch Angle of Helical Nozzle on the Vortex Tube Performance Characteristics

헬리컬 노즐의 피치각에 따른 볼텍스 튜브의 성능특성에 관한 연구

  • Oh, Yeong Taek (Graduate School, Department of Aerospace Engineering, Pusan National University) ;
  • Kim, Kuisoon (Department of Aerospace Engineering, Pusan National University)
  • 오영택 (부산대학교 항공우주공학과 대학원) ;
  • 김귀순 (부산대학교 항공우주공학과)
  • Received : 2015.09.21
  • Accepted : 2015.11.06
  • Published : 2016.02.01
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Abstract

In this paper, a numerical analysis was performed to investigate the effect of the pitch angle of a helical nozzle on the performance characteristics of a vortex tube. Three-dimensional numerical simulation has been performed with standard $k-{\varepsilon}$ turbulence model by using FLUENT 13.0. The effect of the pitch angle of helical nozzle was described in term of ${\beta}$. A CFD analysis was performed on ${\beta}=0^{\circ}$, $5^{\circ}$, $10^{\circ}$, $15^{\circ}$. In order to realize the influence of ${\beta}$ on performances of the vortex tube. Computation results were expressed by the ${\beta}-{\Delta}T_{h,c}$ graph and radial profiles of axial velocity and swirl velocity. The results showed that ${\beta}$ which improves energy separation capacity of vortex tube was $5^{\circ}$ at ${\alpha}=0.33$, 0.5 and $10^{\circ}$ at ${\alpha}=0.33$. Besides, It was confirmed that the results were closely related to axial velocity and swirl velocity.

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References

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