フィルム冷却によるデュアルベルノズルの運転モード遷移の制御 Control of Operation Mode Transition with Film Cooling in Dual-Bell Nozzles

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抄録

Dual-bell nozzle is one of the altitude compensation nozzle concepts, which consists of two bell-type nozzle with different geometric area ratios. The dual bell nozzle has two operation modes—a low altitude operation mode and a high altitude operation mode. However, the practical transition between these operation modes occurs at lower nozzle pressure ratio (NPR) than the optimum one. In the present study, the effect of introduction of film-cooling flow into the nozzle is examined in order to control the operation mode transition NPR. The experimental and numerical results show that the operation mode transition can be control by injecting the film cooling flow at appropriate inlet pressure and flow rate. By injecting the film cooling flow, the axial momentum near the wall in the extension part becomes small and the separation point movement becomes slower. As a result, the dip of the thrust coefficient during the operation mode transition becomes smaller.

収録刊行物

  • 日本航空宇宙学会論文集 = Journal of the Japan Society for Aeronautical and Space Sciences

    日本航空宇宙学会論文集 = Journal of the Japan Society for Aeronautical and Space Sciences 59(693), 281-289, 2011-10-05

    一般社団法人 日本航空宇宙学会

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各種コード

  • NII論文ID(NAID)
    10030274963
  • NII書誌ID(NCID)
    AA11307372
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13446460
  • NDL 記事登録ID
    11277305
  • NDL 雑誌分類
    ZN25(科学技術--運輸工学--航空機・ロケット)
  • NDL 請求記号
    Z74-B503
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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