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NUMERICAL PREDICTION OF THE OPTIMAL STAGGER ANGLES FOR A HIGH-POWER TURBO BLOWER

고마력 터보 블로어의 최적 깃배치각에 관한 수치 예측

  • 박태규 (경상대학교 대학원 기계공학과) ;
  • 정희택 (경상대학교 기계공학과, 항공기부품기술연구소) ;
  • 박준영 (한국기계연구원) ;
  • 성병일 (삼정터빈(주))
  • Received : 2011.06.29
  • Accepted : 2011.09.16
  • Published : 2011.09.30

Abstract

The turbo blowers having large power capacity are generally composed of the variable inlet guide vane, the impeller and the variable diffuser. In the present study, the effect of the stagger angles on the aerodynamic performances has been investigated by CFD methods. The design specifications of the reference model having 400kW power were given as 7.43kg/s of mass flow rate, 1.66 of pressure ratio with 12000rpm of impeller rotating speed. As the first simulation parameter, the diffuser vane angle was varied in the range of ${\pm}$20 degree from the initial-design point. The inlet guide vane angles, as the second one, was changed in the range of ${\pm}$40 degree from the initial-design point. The commercial Navier-Stokes solver, ANSYS-CFX, was applied to solve the three-dimensional unsteady flow fields inside the turbo blower. Through the numerical results, the desirable setting angles were proposed to fit the best performance to the variation of the operating conditions.

Keywords

References

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