Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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Analysis of PIG Dynamics through Curved Section in Natural Gas Pipeline

천연가스 배관 곡관부에서의 피그 동적 거동 해석

  • Kim D. K. (R&D Division, Korea Gas Corporation) ;
  • Nguyen T. T. (Department of Mechanical Engineering, College of Eng., Pukyong National University) ;
  • Yoo H. R. (R&D Division, Korea Gas Corporation) ;
  • Rho Y. W. (R&D Division, Korea Gas Corporation) ;
  • Kho Y.T. (R&D Division, Korea Gas Corporation) ;
  • Kim S. B. (Department of Mechanical Engineering, College of Eng., Pukyong National University)
  • 김동규 (한국가스공사 연구개발원) ;
  • ;
  • 유휘룡 (한국가스공사 연구개발원) ;
  • 노용우 (한국가스공사 연구개발원) ;
  • 고영태 (한국가스공사 연구개발원) ;
  • 김상봉 (부경대학교 기계공학과)
  • Published : 2002.03.01
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Abstract

This paper presents simple models for flow and the PIG dynamics when it passes through a $90^{\circ}$ curved section of pipeline. The simulation has been done with two different operational boundary conditions. The solution fur non-linear hyperbolic partial equations for flow is given by using MOC. The Runge-Kuta method is used to solve the initial condition equation fur flow and the PIG dynamics equation. The simulation results show that the proposed model and solution can be used fur estimating the PIG dynamics when the pig runs in the pipeline including curved section. In this paper, dynamic modeling and its analysis for the PIG flow through $90^{\circ}$ curved pipe with compressible and unsteady flow are studied. The PIG dynamics model is derived by using Lagrange equation under assumption that it passes through 3 different sections in the curved pipeline such that it moves into, inside and out of the curved section. The downstream and up stream flow dynamics including the curved sections are solved using MOC. The effectiveness of the derived mathematical models is estimated by simulation results fur a low pressure natural gas pipeline including downward and upward curved sections. The simulation results show that the proposed model and solution can be used for estimating the PIG dynamics when we pig the pipeline including curved section.

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