不足膨張衝突噴流の振動現象

• 榊原 洋子

• 岩本 順二郎

書誌事項

タイトル別名

• Oscillatory Phenomena of Underexpanded Impinging Jets.
• フソク ボウチョウ ショウトツ フンリュウ ノ シンドウ ゲンショウ

抄録

Self-excited oscillation of an underexpanded jet issuing from a circular nozzle and impinging perpendicularly on a flat plate is analyzed numerically using a TVD scheme. With some nozzle-plate spacings, simple patterns of the oscillation of the flow fields are obtained numerically, and their pressure histories at the center of the plate also show simple wave patterns with a certain amplitude of the pressure. Their amplitudes increase with increase in the nozzle-plate spacing, and a dominant frequency of about 20-30 kHz is obtained by FFT analysis of those pressure histories. The numerical results agree with the experimental data. Such self-excited oscillation seem to be related to the noise of the jet. The amplitude of the pressure history is considered to depend on the area of the compressive region upstream of the plate shock. It is also found that the pressure wave which is generated near the impinging region travels toward the nozzle wall in the air surrounding the jet, which causes the whole jet to oscillate.

収録刊行物

• 日本機械学会論文集Ｂ編

  日本機械学会論文集Ｂ編 62 (595), 971-976, 1996

  一般社団法人 日本機械学会

キーワード

• Underexpanded Jet

詳細情報

• CRID: 1390282680871663616
• NII論文ID: 130004079745
• NII論文ID: 110002394748
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.62.971
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 3935203
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3935203
• Web Site: http://www.jstage.jst.go.jp/article/kikaib1979/62/595/62_595_971/_pdf
• 本文言語コード: ja
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
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