Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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THE CORRELATION OF PRESSURE DROP FOR SURFACE ROUGHNESS AND CURVATURE RADIUS IN A U-TUBE

표면 조도와 곡률 반경에 대한 U-자관 압력 손실의 상관관계

  • Park, J.H. (Department of Mechanical Engineering, Kunsan National University) ;
  • Chang, S.M. (Department of Mechanical Engineering, Kunsan National University) ;
  • Lee, S.Y. (Department of Mechanical Engineering, Kunsan National University) ;
  • Jang, G.W. (Faculty of Mechanical and Aerospace Engineering, Sejong University)
  • Received : 2014.12.17
  • Accepted : 2015.03.13
  • Published : 2015.03.31
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Abstract

In this research, we studied the pressure drop affecting on the internal surface roughness and the curvature radius of a U-tube, which is used for the cooling system in PWR(Pressurized Water Reactor). Using ANSYS-FLUENT, a commercial code based on CFD(Computational Fluid Dynamics) technique, we compared a Moody chart with the Darcy friction factor changed by a range of various surface roughness and Reynolds numbers of a straight pipe model. We studied the effect giving variation about a range of various surface roughness and the curvature radius of the full scale U-tube model. The material of the heat transfer tube is Inconel 690 used in the steam generator. We compared the velocity distribution of selected 4 locations, and derived the correlation between the surface roughness and the pressure drop for the U-tube of each representative curvature radius using the linear regression method.

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References

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