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

The Korean Society of Mechanical Engineers (대한기계학회)
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Two-Dimensional Analysis of Unsteady Flow Through One Stage of Axial Turbine (II)

1단 축류 터빈의 비정상 내부유동특성에 관한 2차원 해석 (II)

  • 박준영 (포항공과대학교 대학원 기계공학과) ;
  • 엄인식 (포항공과대학교 대학원 기계공학과) ;
  • 백제현 (포항공과대학교 기계공학과)
  • Published : 2001.11.01
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Abstract

In this paper, the mechanism of unsteady potential interaction and wake interaction in one stage axial turbine is numerically investigated at design point in two-dimensional viewpoint. The numerical technique used is the upwind scheme of Van-Leer's Flux Vector Splitting (FVS) and Cubic spline interpolation is applied on zonal interface between stator and rotor. The inviscid analysis is used to embody the influence of potential interaction only and viscous analysis is used to embody the influences of both potential interaction and wake interaction at the same time. The potential-flow disturbance from the stator into a rotor passage and the periodic blockage effect of rotor produce the unsteady pressure on the blade surface in inviscid analysis. After the wake is cut by rotor, two counterrotating votical patterns flanking the wake centerline in the passage are generated. So, these phenomena magnify the unsteady pressure in viscous analysis than that in inviscid analysis. The resulting unsteady forces on the rotor, generated by the combined interaction of the two effects by potential and wake interaction, are discussed.

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References

  1. Meyer, R. X. 1958, 'The Effect of Wakes on the Transient Pressure and Velocity Distributions in Turbomachines,' pp. 1544-1552
  2. Lefcort, M. D., 1965, 'An Investigation into Unsteady Blade Forces in Turbomachines,' Journal of Engineeringfor Power, pp. 345-354
  3. Smith, L. H., 1966, 'Wake Dispersion in Turbomachines,' Journal of Basic Engineering, pp. 689-690
  4. Kerrebrock, J. L., Mikolajczak, A. A., 1970, 'IntraStator Transport of Rotor Wakes and Its Effect on Compressor Performance,' Journal of Engineering for Power, pp.359-368
  5. Adachi, T., Murakami, Y, 1979, 'ThreeDimensional Velocity Distribution Between Stator Blade and Unsteady Force on a Blade due to Passing Wakes,' JSME, Vol. 22, No. 170, pp. 1074- 1082
  6. Weyer, J. H., and Dunker, R., 'Flow Measurements in Stator Rows Behind a Transonic Axial Compressor,' AGARD-CP-35, Copenhagen, June, 1983
  7. Hodson, H.P., 1984, 'Boundary Layer and Loss Measurements on the Rotor of an Axial-Flow Turbine,' Journal of Engineering for Gas Turbines and Power, Vol. 106, pp. 39l-399
  8. Hodson, H.P., 1985, 'Measurements of WakeGenerated Unsteadiness in the Rotor Passage of Axial Flow Turbines,' Journal of Engineering for Gas Turbines and Power, Vol. 107, pp. 467-476
  9. Hodson, H.P., 1985, 'An Inviscid Blade-to-Bade Prediction of a Wake-Generated Unsteady Flow,' Journal of Engineering for Gas Turbines and Power, Vol. 107, pp. 337-344
  10. Korakianitis, T., 1992, 'On the Prediction of Unsteady Forces on Gas Turbine Blades. Part I: Description of Approach,' Journal of Turbomachinery, Vol. 114, pp.114-122
  11. Korakianitis, T., 1992, 'On the Prediction of Unsteady Forces on Gas Turbine Blades. Part 2: Analysis of the Results,' Journal of Turbomachinery, Vol. 114, pp.123-131
  12. Korakianitis, T., 1993, 'On the Propagation of Viscous Wakes and Potential Flow in Axial-Turbine Cascaddes,' Journal of Turbomachinery, Vol. 115, pp.118-127
  13. Rai, M. M., 1987, 'Navier-Stokes Simulations of Rotor/Stator Interaction Using Patched and Overlaid Grids,' Journal of Propulsion and Power, Vol. 3, No. 5, pp. 387-396
  14. Madavan, N. K., Rai, M. M. and Gavali, S., 1993, 'Multipassage Three-Dimensional Navier-Stokes Simulation of Turbine Rotor-Stator Interaction,' Journal of Propulsion and Power, Vol. 9, No.3, pp. 389-396
  15. Rai, M. M., Madavan, N. K., 1990, 'Multi-Airfoil Navier-Stokes Simulations of Turbins Rotor-Stator Interaction,' Journal of Turbomachinery, Vol. 112, pp.377-384
  16. Arnone, A., Pacciani, R., and Sestini, A., 1995, 'Multigrid Computations of Unsteady Rotor-Stator Interaction Using the Navier-Stokes Euation,' Journal of Fluids Engineering, 1995, Vol. 117, pp. 647-652
  17. Arnone, A., Pacciani, R., 1996, 'Rotor-Stator Interaction Analysis Using the Navier-Stokes Equations and a Multigrid Method,' Journal of Turbomachinery, 1996, Vol. 118, pp. 679-689
  18. 최창호, 유정열, 1999, '저 레이놀즈수 난류모델을 사용한 정익-동익 상호작용 해석,' 대한기계학회논문집 B권 제 23 권 제 10 호, pp. 1229-1239
  19. 박준영, 엄인식, 백제현, 1999, '1단 축류 터빈의 비정상 내부 유동특성에 관한 2차원 해석(I),' 대한기계학회논문집 B권 제 23 권 제 11 호, pp. 1371-1378