한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2003년도 추계 학술대회논문집
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- Pages.171-175
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- 2003
축류터빈 동익 내부의 누설유동에 관한 수치해석
Numerical Analysis of Tip Leakage Flows in Axial Flow Turbine Rotors
초록
Numerical analysis of three-dimensional viscous flow-fields in the turbine rotor passages is carried out to investigate flow physics including the interaction between secondary vortices, tip leakage vortex, and the rotor wake. The blade tip geometry is accurately modeled adopting the embedded H grid topology. An explicit four-stage Runge-Kutta scheme is used for the time integration of both the mean flow and turbulence equations. The computational results for the entire turbine rotor flows, particularly the tip clearance flow and the secondary flows, are interpreted and compared with the experimental data from the Penn State turbine stage. Good agreement between the experimental data and the numerical prediction was achieved in the sense of the major features of the flow fields.
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