Departmental Bulletin Paper フリップフロップ・ジェット・ノズルの発振周波数について
フリップ フロップ・ジェット・ノズル ノ ハッシン シュウハスウ ニツイテ
On oscillation frequency of a flip-flop jet nozzle

井上, 達哉  ,  在所, 英治  ,  水野, 剛  ,  近藤, 正樹  ,  平田, 勝哉  ,  イノウエ, タツヤ  ,  ザイショ, ヒデマル  ,  ミズノ, ゴウ  ,  コンドウ, マサキ  ,  ヒラタ, カツヤ  ,  Inoue, Tatsuya  ,  Zaisyo, Hidemaru  ,  Mizuno, Gou  ,  Kondo, Masaki  ,  Hirata, Katsuya

57 ( 2 )  , pp.107 - 117 , 2016-07-31 , 同志社大学ハリス理化学研究所 , Transcription:ドウシシャ ダイガク ハリス リカガク ケンキュウジョ , Alternative:Harris Science Research Institute of Doshisha University
This research deals with the oscillation frequency of a flip-flop jet nozzle based on the measurements of pressure and velocity in a connecting tube. The trace of pressure difference between both the ends of the connecting tube is simply modeled by a triangular wave, and the velocity in the connecting tube is calculated by the method of characteristics and the Runge-Kutta method. The authors assume that a jet switches when the integral [J][M], [J][K] or [J][P] reaches a threshold value, where [J][M], [J][K] and [J][P] are the accumulations of momentum, kinetic energy and mass which are transported through the connecting tube from a side wall with higher pressure into another side wall with lower pressure, respectively. As a result, [J][P] is the most adequate among the three. The Strouhal number calculated on the basis of [J][P] agrees well with experimental one.

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