Investigation and numerical simulation on film cooling performance with an anti-vortex hole design: Influences of diameter ratio

Zhu, Rui; Lin, Enci; Simon, Terrence W.; Xie, Gongnan

doi:10.1016/j.icheatmasstransfer.2021.105118

Cited by 17 publications

(1 citation statement)

References 43 publications

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“…Double-jet and sister-hole geometries have been investigated during the past decade [17][18][19][20][21][22]. Recently, Zhou et al [23], Yao et al [24], and Zhu et al [25] have studied the effects of the diameter ratio of the side hole and main hole on film cooling effectiveness in double-jet and tripod holes. The interaction between the upstream and downstream film cooling rows was the subject of investigation by Wang et al [26] who concluded that such interaction weakens the effects of the kidney vortices.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies of the Film Cooling Effectiveness Downstream of a Curved Diffusion Film Cooling Hole

Fan

Taslim

2022

International Journal of Rotating Machinery

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Film cooling technology is a commonly used method for thermal protection of gas turbines’ hot sections. A new, shaped, film cooling hole is proposed in this study. The geometry is made of a straight-through cylindrical feed hole at an inclination angle of 30° followed by an expansion section. The expansion section is created by the rotation of the same circular hole on the inclination plane about an axis normal to that plane which passes through the center of the feed hole exit area. This shape was designed to decrease the deteriorating effects of kidney vortices by proper distribution of the coolant flow emerging from the hole exit area. Cases with four rotation angles (7°, 14°, 17.5°, and 21°) were studied both experimentally and numerically and for the blowing ratios of 0.5, 1, and 2.0. For comparisons, the commonly used 7°-7°-7° diffusion hole geometry was also tested under otherwise identical conditions. For data collection, the pressure-sensitive paint (PSP) technique was used to measure the film cooling effectiveness. Streamwise- and spanwise-averaged film effectiveness results were obtained to compare the performance of different geometries. The main conclusions were that the case of 21° rotation angle produced the highest film effectiveness and outperformed the 7°-7°-7° diffusion hole geometry.

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