Investigation on transonic tone in supersonic nozzle

Makiko Yonamine, Jung Sungjae, Toshiyuki Aoki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present paper describes experimental and numerical works to investigate noise phenomenon in supersonic flow that is discharged from a convergent-divergent nozzle. The noise phenomenon of flow is generated by an emission of 'transonic tone' that can be occurred independently of the general noise components at low pressure ratios that a shock wave arise within the divergent section of the nozzle. The results of obtaining show that the frequency of a transonic tone that differs from the frequency of a screech tone due to the shock-cell structures in a jet, and originates in the shock wave in the nozzle increases in proportion to the nozzle pressure ratio. The transonic tone of high-order has the directivity in the direction of the flow. Also the value of a predominant frequency of the wall static pressure fluctuation in the shock wave downstream is almost corresponding to the value of the frequency in which the transonic tone is shown.

Original languageEnglish
Title of host publication16th International Congress on Sound and Vibration 2009, ICSV 2009
Pages2672-2678
Number of pages7
Volume5
Publication statusPublished - 2009
Event16th International Congress on Sound and Vibration 2009, ICSV 2009 - Krakow, Poland
Duration: Jul 5 2009Jul 9 2009

Other

Other16th International Congress on Sound and Vibration 2009, ICSV 2009
CountryPoland
CityKrakow
Period7/5/097/9/09

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All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Yonamine, M., Sungjae, J., & Aoki, T. (2009). Investigation on transonic tone in supersonic nozzle. In 16th International Congress on Sound and Vibration 2009, ICSV 2009 (Vol. 5, pp. 2672-2678)