A209 STUDY ON THE MIXING PHENOMENA OF FILM COOING JET BLOWING THROUGH SHAPED HOLES(Gas Turbine-6)

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概要

• 論文の詳細を見る

• To understand the mixing phenomena of film cooling air with mainstream is very important to attain higher film cooling performance. This paper describes the detailed mixing mechanism of film cooling air with mainstream using a low-speed wind tunnel. The three different shaped film cooling holes and a conventional circular hole were used in the experiment for comparison. The time-mean and instantaneous fields of velocity and film cooling effectiveness were measured in high resolution by PIV and LIF, respectively. The experimental results show that fine vortex structures are formed in the shear layer between film cooling air and mainstream. Numerical simulation has been also conducted to examine detailed mechanism of the mixing process, using Detached Eddy Simulation (DES). The DES revealed that pre-mixing of coolant jet and mainstream occurs inside a shaped hole (c), which has relatively long and deep diffused exit. This leads to deterioration of film cooling effectiveness at the downstream.

• 一般社団法人日本機械学会の論文
• 2009-11-16

著者

• Oda Yutaka

  Dept. Of Mech. Eng. Osaka University

• Komiyama Masaharu

  Dept. Of Mech. Eng. Osaka University

• HADA Satoshi

  Mitsubishi Heavy Industries, Ltd

• MORI Shohei

  Dept. of Mech. Eng., Osaka University

• TAKEISHI Kenichiro

  Dept. of Mech. Eng., Osaka University

• Mori Shohei

  Dept. Of Mech. Eng. Osaka University

• Hada Satoshi

  Mitsubishi Heavy Industries Ltd

• Takeishi Kenichiro

  Dept. Of Mech. Eng. Osaka University

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• A209 STUDY ON THE MIXING PHENOMENA OF FILM COOING JET BLOWING THROUGH SHAPED HOLES(Gas Turbine-6)
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