Flow Induced Noise in a Turbulent Boundary Layer over a Bump

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 354
  • Download : 0
Direct numerical simulations of a turbulent boundary layer over a bump were performed to examine the effects of surface longitudinal curvature on flow induced noise. Turbulence statistics and frequency spectra were obtained to elucidate the response of wall pressure fluctuations (pw) to the longitudinal curvature and to the corresponding pressure gradient. Acoustic sources of the Lighthill equations were investigated in detail at various longitudinal surface curvatures. The acoustic sources (S) were highest near the trailing edge of the bump, where the r.m.s. wall pressure fluctuations were greatest. The maximum correlation coefficient between pw and S was located just above the location of maximum wall pressure fluctuations. Far-field acoustic density fluctuations were computed using the Lighthill acoustic analogy.
Issue Date
2006-05-22
Language
ENG
Citation

11th Asian Congress of Fluid Mechanics

URI
http://hdl.handle.net/10203/152025
Appears in Collection
ME-Conference Papers(학술회의논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0