Conference Paper 環状スリットノズルからの二次空気によるジェット騒音低減の試み
Jet Noise Reduction Using Secondary Air from Annular Slit Nozzle

佐藤, 寛太  ,  沢田, 恭兵  ,  生沼, 秀司  ,  石井, 達哉  ,  金子, 成彦  ,  Sato, Kanta  ,  Sawada, Kyohei  ,  Oinuma, Hideshi  ,  Ishii, Tatsuya  ,  Kaneko, Shigehiko

Description
It is known that the microjet blowing secondary air to the jet shear layer is effective in reducing jet mixing noise. One of the considerations for the microjet is a nozzle shape for injecting the secondary air. In the previous studies, the flow rate and the arrangements of microjet nozzles under cold jet were investigated. Considering the application of the microjet to the actual engine, however, it is necessary to grasp the acoustic characteristics under heated jet. In this paper, we applied the microjet nozzle of annular slit shape to the model-scale turbojet engine with changing the split number and cross sectional area of microjet and evaluated the far-field noise reduction effect.
会議情報: 第47回流体力学講演会/第33回航空宇宙数値シミュレーション技術シンポジウム (2015年7月2日-3日. 東京大学生産技術研究所), 目黒区, 東京
形態: カラー図版あり
Meeting Information: 47th Fluid Dynamics Conference /the 33rd Aerospace Numerical Simulation Symposium (July 2-3, 2015. Institute of Industrial Science , the University of Tokyo), Meguro-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations
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