Irrotational fluctuations near a turbulent boundary layer

11 January 1967

journal article
research article
Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics

Vol. 27 (2) , 209-230
https://doi.org/10.1017/s002211206700028x

Abstract

A verification of some of the predictions of the theory of Phillips (1955) is presented, and the relation between one-dimensional and two-dimensional wavenumber spectra is discussed. The convection velocity of the irrotational field deduced from measurements of the frequency spectrum alone appears to be about 0.9U₁in the frequency range carrying most of the energy. It follows that the pressure-fluctuation spectrum is proportional to the velocity-fluctuation spectrum and varies as ω²at low frequency. The discrepancy between this result and measurements of wall-pressure spectra is plausibly attributed to extraneous sound.

Keywords

TURBULENT BOUNDARY LAYER

This publication has 1 reference indexed in Scilit:

XXV.A short table of the functions Ki_n(x), from n=1 to n=16
Journal of Computers in Education, 1935