| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Attempts were made to optimize double flow control devices (DFCD) for achieving better film cooling performance of gas turbine cooling holes. Although the device was formerly proven to improve film effectiveness dramatically, CFD-based Taguchi Method was made to optimize the shape and configuration of the device for the flow with the inlet flow angle adopted as noise factor. In the experiment, we employ CO2 as the cooling air to achieve the flow condition of DR=1.5, which allows us to measure the film effectiveness by PSP technique. The film coverage was notably improved by use of DFCDs, regardless of the flow angle. It was found that the film cooling enhancement was caused by changes of the vortex structure. The performance of the optimal device was then checked by the comparison with no device cases. The optimal device showed overwhelming cooling performance through the PSP measurement in the wind tunnel test.
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