EXPERIMENTAL STUDY FOR AERODYNAMIC PERFORMANCE OF ULTRA-HIGHLY LOADED AXIAL TURBINE BY USING SMALL SIZED WIND TUNNEL FOR ANNULAR CASCADE : APPLICATION EFFECT OF SQUEALER TIP

DOI IR (HANDLE)

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Other Title
  • 小型円環翼列風洞による超高負荷軸流タービンの空力性能に関する実験的研究 : スキーラ翼端の適用効果

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Description

The increase of turbine blade loading by the increase of blade turning angle is an effective method to improve the efficiency of gas turbines. However, it intensifies the secondary flows, such as passage vortex and leakage vortex. The squealer tip, which has a cavity on the blade tip surface, is one of the techniques to reduce the leakage flow. In this study, the performance tests were performed for the ultra-highly loaded turbine cascade (UHLTC) with three kinds of squealer tip, which were different in the cavity depth, by using the small sized wind tunnel test rig for an annular cascade. The test results showed that the application of the squealer tip with minimum cavity depth contributed to the enhancement of aerodynamic performance of the UHLTC. It increased the torque but had almost no effects on the efficiency due to the increase of the loss in the high flow coefficient region. On the other hand, its application improved the efficiency in the low flow coefficient region because of the reduction of the loss as well as the increase of the torque.

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Details 詳細情報について

  • CRID
    1390296575287401088
  • DOI
    10.15002/00026307
  • HANDLE
    10114/00026307
  • ISSN
    24368083
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
  • Abstract License Flag
    Allowed

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