Computational analysis of mach number effects on edgetone

Taku Nonomura, Hiroko Muranaka, Kozo Fujii

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

3 Citations (Scopus)


In this study, Mach number effect on edgetone is investigated to verify the feedback-loop of edgetone using the high-order computation. The computational results show three clear points. When the Mach number increases independently, 1) the edgetone phenomenon tends to cease 2) the frequency of edgetone becomes lower 3) the oscillation mode (which is named stage) of edgetone becomes lower. The second point shows that the edgetone mechanism is explained by the fluid-acoustic feedback-loop. As for the Powell's feedback-loop equation our computational results show that phase-lag p is constant Therefore the feedback-loop equation is verified to be physically correct. However the computed value of p is -0.2 which does not correspond to that of Powell's suggestion.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 36th AIAA Fluid Dynamics Conference
Number of pages14
Publication statusPublished - 2006 Dec 11
Externally publishedYes
Event36th AIAA Fluid Dynamics Confernce - San Francisco, CA, United States
Duration: 2006 Jun 52006 Jun 8


Other36th AIAA Fluid Dynamics Confernce
CountryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Engineering(all)

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