Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Analysis on Cascade Performance of Double-Circular-Arc Hydrofoil

수치 모사를 통한 이중원호 익렬의 성능 예측

  • Jeong, Myeong-Gyun (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • O, Jae-Min (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Paeng, Gi-Seok (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Song, Jae-Uk
  • Published : 2002.03.01
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Abstract

In order to design and analyze the performance of an axial-flow pump it is necessary to know the flow deviation, deflection angle and pressure loss coefficient as a function of the angle of incidence for the hydrofoil section in use. Because such functions are unique to the particular section, however, general correlation formulae are not available for the multitude of hydrofoil profiles, and such functions must be generated by either experiment or numerical simulation for the given or selected hydrofoil section. The purpose of present study is to generate design correlations for hydrofoils with double circular arc (DCA) camber by numerical analysis using a commercial code, FLUENT. The cascade configuration is determined by a combination of the inlet blade angle, blade thickness, camber angle, and cascade solidity, and a total of 90 cascade configurations are analyzed in this study. The inlet Reynolds number based on the chord and the inlet absolute velocity is fixed at 5${\times}$10$\^$5/. Design correlations are formulated, based on the data at the incidence angle of minimum total pressure loss. The correlations obtained in this way show good agreement with the experiment data collected at NASA with DCA hydrofoils.

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References

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