B-22 クローミキサのエンジン騒音試験(航空機用・騒音,一般講演)

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タイトル別名
  • B-22 Engine Noise Test of Claw Mixers

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抄録

A concept of claw mixer was proposed as a jet noise reduction device. A claw mixer, composed of several nails, is installed at the nozzle end. The nail, having a sharp edge on one side and decreasing its cross-sectional area toward the tip, is expected to generate disturbances in the shear layer jet to enhance mixing process behind the nozzle. In addition to the ongoing subscale model tests, a noise test on a large-scale nozzle using a jet engine was planned. This paper outlines the engine noise test and the results with regard to the 5 types of claw mixers. The tested claw mixers provided noise reduction like conventional mixers; they suppressed well middle and lower frequency noise in rear direction but increased additional higher frequency noise. A simple estimation without thrust penalty suggested the noise margin more than 1.5dB in EPNL at lateral point.

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詳細情報 詳細情報について

  • CRID
    1574231877582832512
  • NII論文ID
    110009863462
  • NII書誌ID
    AN10255898
  • ISSN
    09191941
  • 本文言語コード
    ja
  • データソース種別
    • CiNii Articles

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