Heat Transfer Enhancement without Deteriorating Thermal Shield Performance by Using Dimples
| Project/Area Number |
26420136
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Murata Akira 東京農工大学, 工学(系)研究科(研究院), 教授 (60239522)
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| Co-Investigator(Renkei-kenkyūsha) |
IWAMOTO Kaoru 東京農工大学, 大学院工学研究院, 准教授 (50408712)
SAITO Hiroshi 東京都立産業技術高等専門学校, ものづくり工学科, 助教 (40401450)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | フィルム冷却 / 伝熱促進 / ガスタービン翼 / ディンプル / 非定常法 / 流れの可視化 / LES |
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| Outline of Final Research Achievements |
Cooling at trailing edge of gas turbine airfoil is one of the most difficult problems because of its thin shape: high thermal load from both surfaces, hard-to-cool geometry of narrow passages, and at the same time demand for structural strength are the reasons. In this study, heat transfer coefficient and film cooling effectiveness on pressure-side cutback surface were measured by a transient infrared thermography technique with consideration of three-dimensional heat conduction. The flow field was measured by a stereo PTV method. Furthermore, numerical analyses were performed by LES and DNS methods. The optimum dimpled surface configuration (combination of rotation angle and arrangement) was determined and the principle of the thermal shield and convective cooling by the dimpled surface was explained.
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Report
(4 results)
Research Products
(14 results)
