이산와법에 의한 2원주 주위의 유동장 수치계산

Flowfield Calculation around Two Circular Cylinders by a Discrete Vortex Method

  • 노기덕 (경상대학교 수송기계공학부) ;
  • 강호근 (경상대학교 수송기계공학부) ;
  • 최형두 (경상대학교 수송기계공학부)
  • 발행 : 2002.08.01

초록

The Flow patterns around two cylinders in various arrangements were studied by a discrete vortex method. The flow for the surface of each cylinder was represented by arranging bound vortices at adequate intervals. The viscous diffusion of fluid was represented by the random walk method. The vortex distributions, streaklines, timelines and velocity vectors around two cylinders were calculated for centre-to-centre pitch ratios of $P/D=1.5 and 2.5$, attack angles of ${\alpha}=0^{\circ},\;30^{\circ},\;60^{\circ}\;and\;90^{\circ}$, and Reynolds number of Re=1200. The results of simulation correspond to the photographs by flow visualization and the flow intereference between two cylinders in various arrangements was clearly visualized by a numerical simulation.

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