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노형운(Hyung-Woon Roh),서상호(Sang-Ho Suh),김진형(Jin Hyung Kim),김태권(Teckwon Kim),오석영(SuegYoung Oh),하필수(PilSu Ha),정종현(Jong-hyun Jung),김광홍(KwangHong Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In order to improve the efficiency, the CFD-based design system is applied to the Francis turbine replacement project with Korea Fluid Machinery Association (below KFMA) and K-water. The inversed design technique and the fully turbulent 3-dimensional flow simulations are performed in the previous study. In this study, the runner is newly manufactured from the reversed engineering and CFD's results. By Manufacturing method, the precision wood pattern, casting, a number of the surface blasting as like the buffering and a balancing technique is selected Furthermore, The turbine with newly runner is respectively experimented with the output in accordance with IEC60041 code. The performances of the new design are verified by the approved test and the guarantees have all been successfully met. From the experiment results, the efficiency of the newly turbine, 87.5% is more enhanced than the efficiency of the old model for the 500kW. The perfect combination of the CFD analysis has finally resulted in a new model which can provide about a 10% increase in peak efficiency.