Effects of Tip Shape on the Gas Turbine Blade Tip Heat Transfer

Nho, Young Cheol; Lee, Yong Jin; Kwak, Jae Su

doi:10.2514/1.56117

Cited by 1 publication

(2 citation statements)

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“…Numerical studies performed by Lee et al 17 and Nho et al 18 aimed to reveal the generation and trace of the vortex in the tip cavity. They indicated that the triangular grooved suction side tip showed comparable flow loss and lower heat transfer compared to the other cavity tip, and the conventional cavity tip achieved the best performance in both aspects of heat transfer and total pressure.…”

Section: Introductionmentioning

confidence: 99%

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Effects of tip cavity geometries on the aerothermal performance of the transonic turbine blade with cavity tip

Song

2016

Proceedings of the Institution of Mechanical Engineers, Part A:

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The inevitable transonic tip leakage flow in unshrouded high pressure gas turbines induces aerodynamic loss and gives rise to heavy thermal loads on the blade tip. In the pursuit of superior gas turbine engine, cavity tips are widely used in high-pressure turbines to reduce the over-tip leakage flow. The present research aims to numerically investigate the influence of the depth of cavity and thickness of squealer rim on the aerothemal performance of the transonic turbine blade. Three-dimensional (3D) Reynolds-Averaged Navier-Stokes (RANS) equations with Spalart-Allmaras turbulence were solved to perform the simulation. The obtained results indicate that the variations of the cavity depth and squealer rim thickness have significant effects on the aerothermal performance of the transonic turbine blade tip regions. The phenomena in this transonic setup are different from the results obtained in subsonic condition. This study quantified that the improvement of aerodynamic efficiency contributed to the enhancement of heat flux on the blade tip in transonic condition by changing the geometry of tip cavity.

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Section: Introductionmentioning

confidence: 99%

“…Numerical studies performed by Lee et al. 17 and Nho et al. 18 aimed to reveal the generation and trace of the vortex in the tip cavity.…”

Section: Introductionmentioning

confidence: 99%