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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Incidence Angle on Turbine Blade Heat Transfer Characteristics (I) - Blade Tip -

입사각 변화에 따른 터빈 블레이드에서의 열전달 특성 변화 (I) - 블레이드 끝단면 -

  • Published : 2007.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

The present study investigated local heat/mass transfer characteristics on the tip of the rotating turbine blade with various incoming flow incidence angles. The experiments are conducted in a low speed annular cascade with a single stage turbine. The blade has a flat tip with a mean tip clearance of 2.5% of the blade chord. The incoming flow Reynolds number is $1.5{\times}10^5$ at design condition. To examine the effect of off-design condition, the experiments with various incidence angles ranging between $-15^{\circ}$ and $+7{\circ}$ were conducted. A naphthalene sublimation method is used to measure detailed mass transfer coefficient on the blade. The results indicated that the incidence angle strongly affects the behavior of tip leakage flow around the blade tip and consequently plays an important role in determining heat transfer characteristics on the tip. For negative incidence angles, the heat/mass transfer in the upstream region on the tip decreases by up to 20%. On the contrary, for positive incidence angles, much higher heat transfer coefficients are observed even with small increase of incidence angle.

Keywords

References

  1. Chen, P. H. and Goldstein, R. J., 1992, 'Convective Transport Phenomena on the Suction Surface of a Turbine Blade Including the Influence of Secondary Flows Near the Endwall,' ASME J. of Turbomachinery, Vol. 114, pp. 776-787 https://doi.org/10.1115/1.2928031
  2. Goldstein, R. J., Wang, H. P. and Jabbari, M. Y., 1994, 'The Influence of Secondary Flows near the Endwall and Boundary Layer Disturbance on Convective Transport from a Turbine Blade,' ASME Paper No. 94-GT-165
  3. Han, J. C., Zhang, L. and Ou, S., 1993, 'Influence of Unsteady Wake on Heat Transfer Coefficient From aGas Turbine Blade,' ASME J. of Heat Transfer, Vol. 115, pp. 904-911 https://doi.org/10.1115/1.2911386
  4. Arts, T., Duboue, J.-M. and Rollin, G., 1998, 'Aerothermal Performance Measurements and Analysis of a Two-dimensional High Turning Rotor Blade,' ASME J. of Turbomachinery, Vol. 120, pp. 494-499 https://doi.org/10.1115/1.2841745
  5. Blair, M. F., 1994, 'An Experimental Study of Heat Transfer in a Large-scale Turbine Rotor Passage,' ASME J. of Turbomachinery, Vol. 116, pp. 1-13 https://doi.org/10.1115/1.2928273
  6. Kwak, J. S. and Han, J. C., 2003, 'Heat Transfer Coefficients on the Squealer Tip and Near Squealer Tip Regions of a Gas Turbine Blade,' ASME J. of HeatTransfer, Vol. 125, pp. 669-677 https://doi.org/10.1115/1.1571849
  7. Jin, P. and Goldstein, R. J., 'Local Mass/Heat Transfer on Turbine Blade Near-Tip Surface,' ASME Paper No. GT-2002-30556
  8. Kwon, H. G., Lee, S. W. and Park, B. K., 2002, 'Measurements of Heat (Mass) Transfer Coefficient on the Surface of a Turbine Blade with a High Turning Angle Using Naphthalene Sublimation Technique,' Trans. of the KSME B, Vol. 26, pp. 1077-1087 https://doi.org/10.3795/KSME-B.2002.26.8.1077
  9. Rhee, D. H. and Cho, H. H., 2005, 'Heat/Mass Transfer Characteristics on Stationary Turbine Blade and Shroud in a Low Speed Annular Cascade (I) - Near-tip Blade Surface,' Trans. of the KSME B, Vol. 29, No. 4, pp. 485-494 https://doi.org/10.3795/KSME-B.2005.29.4.485
  10. Rhee, D. H. and Cho, H. H., 2005, 'Heat/Mass Transfer Characteristics on Stationary Turbine Blade and Shroud in a Low Speed Annular Cascade (II) - Tipand Shroud,' Trans. of the KSME B, Vol. 29, No. 4, pp. 495-503 https://doi.org/10.3795/KSME-B.2005.29.4.495
  11. Kwak, J. S. and Han, J. C., 2003, 'Heat Transfer Coefficients and Film-Cooling Effectiveness on a Gas Turbine Blade Tip,' ASME J. of Heat Transfer, Vol. 125,2003, pp. 494-502 https://doi.org/10.1115/1.1565096
  12. Ahn, J. Y., Mhetras, S., Han, J. C., 2004, 'Film-Cooling Effectiveness on a Gas Turbine Blade Tip Using Pressure Sensitive Paint,' ASME Paper No. GT2004-53249
  13. Mhetras, S., Yang, H., Gao, Z. and Han, J. C., 2005, 'Film-Cooling Effectiveness on Squealer Rim Walls and Squealer Cavity Floor of a Gas Turbine Blade Tip Using Pressure Sensitive Paint,' ASME Paper No. GT2005-68387
  14. Rhee, D. H. and Cho, H. H., 2005, 'Effect of Relative Position of Vane and Blade on Heat/Mass Transfer Characteristics on Stationary Turbine Blade Surface,' Fluid Engineering Journal, Vol. 8, No. 4, pp. 27-38 https://doi.org/10.5293/KFMA.2005.8.4.027
  15. Rhee, D. H. and Cho, H. H., 2006, 'Effect of Vane/Blade Relative Position on Heat/Mass Transfer Characteristics on the Tip and Shroud for Stationary Turbine Blade,' Trans. of the KSME B, Vol. 30, No. 5, pp. 446-456 https://doi.org/10.3795/KSME-B.2006.30.5.446
  16. Guenette, G. R., Epstein, A. H., Norton, R. J. G.. and Yuzhang, C., 1985, 'Time Resolved Measurements of a Turbine Rotor Stationary Tip Casing Pressure and Heat Transfer Field,' AIAA Paper No. 85-1220
  17. Guenette, G. R., Epstein, A. H., Giles, M. B., Haimes, R. and Norton, R. J. G., 1989, 'Fully Scaled Transonic Turbine Rotor Heat Transfer Measurements,' ASME J. of Turbomachinery, Vol. 111, pp. 1-7 https://doi.org/10.1115/1.3262231
  18. Abhari, R. S. and Epstein, A. H., 1994, 'An Experimental Study of Film Cooling in a Rotating Transonic Turbine,' ASME J. of Turbomachinery, Vol. 116, pp. 63-70 https://doi.org/10.1115/1.2928279
  19. Haldeman, C. W. and Dunn, M. G., 2004, 'Heat Transfer Measurements and Predictions for the Vane and Blade of a Rotating High-Pressure Turbine Stage,' ASME J. of Turbomachinery, Vol. 126, pp. 101-109 https://doi.org/10.1115/1.1626132
  20. Metzger, D. E., Dunn, M. G. and Hah, C., 1991, 'Turbine Tip and Shroud Heat Transfer,' ASME J. of Turbomachinery, Vol. 113, pp. 502-507 https://doi.org/10.1115/1.2927902
  21. Dunn, M. G. and Haldeman, C. W., 2000, 'Time-Averaged Heat Flux for a Recessed Tip, Lip, and Platform of a Transonic Turbine Blade,' ASME J. of Turbomachinery, Vol. 122, pp. 692-698 https://doi.org/10.1115/1.1311285
  22. Polanka, M. D., Clark, J. P., White, A. L., Meininger, M. and Praisner, T. J., 2003, 'Turbine Tip and Shroud Heat Transfer and Loading Part B: Comparisons between Prediction and Experiment Including Unsteady Effects,' ASME Paper No. GT-2003-38916
  23. Goldstein, R. J. and Cho, H. H. 1995, 'A Review of Mass Transfer Measurements Using Naphthalene Sublimation,' Experimental Thermal and Fluid Science, Vol. 10, pp. 416-434 https://doi.org/10.1016/0894-1777(94)00071-F
  24. Eckert, E.R.G., Sakamoto, H. and Simon, T. W., 2001, 'The Heat and Mass Transfer Analogy Factor, Nu/Sh, for Boundary Layers on Turbine Blade Profiles,' International Journal of Heat and Mass Transfer, Vol. 44, pp. 1223-1233 https://doi.org/10.1016/S0017-9310(00)00175-7
  25. Kline, S. J. and McClinetock, F., 1953, 'Describing Uncertainty in Single Sample Experiments,' Mech. Eng., Vol. 75, pp. 3-8

Cited by

  1. vol.11, pp.1, 2008, https://doi.org/10.5293/KFMA.2008.11.1.089