Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
권호 표지

An Experimental Study on the Frequency Characteristics of Hole Tones Generated by a Circular Jet of Low Speed Impinging on a Plate with a Round Hole

저속의 원형분류가 구멍에 충돌할 때 발생한 구멍음의 주파수특성에 관한 실험적 연구

  • 이동훈 (서울산업대학교 기계공학과)
  • Published : 1997.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this study is to investigate experimentally the frequency characteristics of the hole tones generated by a circular jet of low speed impinging on a plate with a round hole. The experimental results about the sound spectrum and the time wave of the hole tone are presented and discussed in relation with the hole type, the jet velocity and the distance of the nozzle-to-plate with a round hole. From the sound spectrum and time wave measurements, it is found that the hole tone is generated not only by an interaction of convected vortices with a round hole but also by a series of vortex shedding from jets passing through a hole. The hole tones generated by a feedback mechanism consist of many frequency stages and also have a hysteresis phenomenon like an edge tone. But the hole tones generated by a series of vortex shedding have nothing with the stage characteristics. The frequencies of hole tones are influenced by the jet velocity, the distance of the nozzle-to-plate with a round hole and the hole type.

Keywords

References

  1. General Concepts and Elementary Sources v.1 Mechanics of Flow-Induced Sound and Vibration Blake, W. K.
  2. Acustica v.3 On Edge Tones and Associated Phenomena Powell, A.
  3. J.Acoust.Soc.Am. v.33 On the Edge Tone Powell, A.
  4. J.Acoust.Soc.Am. v.62 no.5 Fluid Mechanics of the Edgetone Holger, D.K.;Wilson, T.A.;Beavers, G.S.
  5. J.Acoust.Soc.Am. v.72 no.2 Mechanisms of Flow-Excited Cavity Tones at Low Mach Number Elder, S.A.;T.M.Farabee;F.C.Demetz
  6. J.Fluid Mech. v.105 Dynamics of an Impinging Jet Part 1. The Feedback Phenomenon Ho, C.M.;Nosseir, N.S.
  7. J.Acoust.Soc.Am. v.37 no.5 Some Experiments concerning the Hole and Ring Tone Chanaud, R.C.;Powell, A.
  8. AIAA Journal v.26 no.9 Hole Tone Generated from Almost Chocked to Highly Chocked Jets Umeda, Y.;Maeda, H.;Ishii, R.
  9. J.Acoust.Soc.Am. v.94 no.2 Hole Tone Generation from Highly Chocked Jets Umeda, Y.;Ishii, R.
  10. Phys.Fluids v.30 no.8 Discrete Tones Generated by the Impingement of a High-Speed Jet on a Circular Cylinder Umeda, Y.;Maeda, H.;Ishii, R.
  11. 평판에 충돌하는 원형 분류의 공력소음에 관한 실험적 연구 v.7 no.1 이동훈;권영필;한희갑