• 제목/요약/키워드: Copmutational Fluid Dynamics

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유동해석을 이용한 고압증기터빈 단효율 변화 예측 (Rediction of Stage Efficiency Variation of a USC High Pressure Steam Turbine by Computational Fluid Dynamics)

  • 강수영;장혁준;이정진;김동섭;박성진;홍기원
    • 한국유체기계학회 논문집
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    • 제20권2호
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    • pp.17-25
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    • 2017
  • Prediction of performance and operating characteristics of a state-of-the-art ultra-supercritical (USC) steam turbine is an important issue in many ways. Theoretical and empirical correlation equations, developed a few decades ago, have been widely used in commercial programs for a prediction of performance. To improve of these correlation equations and apply them to the high pressure turbine of a USC steam turbine, computational fluid dynamic analysis was carried out and correlation equations to calculate efficiency variation of each stage were made. Both fluid dynamic characteristic and thermodynamic performance was analyzed for the development of the correlation equations. In particular, the impact of flow addition through an overload valve (OLV) between stages was examined throughly. The trend of pressure drop due to the flow mixing by the OLV flow addition was analyzed and an efficiency correlation equation considering the OLV flow was also made.