New aspects of subsonic aerodynamic noise theory

A theory of aerodynamic noise is presented which differs from Lighthill's theory primarily in the way in which convection of the noise sources is treated. The sound directivity pattern obtained from the present theory agrees better with jet-noise directivity data than does that obtained from Lighthill's theory. The results imply that the shear-noise contribution to jet noise is smaller than previously expected.

[1]  Wing T. Chu.  Turbulence Measurements Relevant to Jet Noise , 1966 .

[2]  P. A. Lush,et al.  Measurements of subsonic jet noise and comparison with theory , 1971, Journal of Fluid Mechanics.

[3]  J. Hinze,et al.  Turbulence: An Introduction to Its Mechanism and Theory , 1959 .

[4]  H. S. Ribner,et al.  Quadrupole correlations governing the pattern of jet noise , 1967, Journal of Fluid Mechanics.

[5]  D. Pridmore‐Brown,et al.  Sound propagation in a fluid flowing through an attenuating duct , 1958, Journal of Fluid Mechanics.

[6]  M. Goldstein,et al.  Emission of sound from axisymmetric turbulence convected by a mean flow with application to jet noise , 1972 .

[7]  Mark J. Beran,et al.  Statistical Continuum Theories , 1968 .

[8]  H. S. Ribner,et al.  The Generation of Sound by Turbulent Jets , 1964 .

[9]  A. Shapiro.  The dynamics and thermodynamics of compressible fluid flow. , 1953 .

[10]  M. Goldstein,et al.  Emission of sound from turbulence convected by a parallel flow in the presence of solid boundaries , 1973 .

[11]  James C Laurence,et al.  Intensity, Scale, and Spectra of Turbulence in Mixing Region of Free Subsonic Jet , 1956 .

[12]  G. Csanady,et al.  An experimental investigation of the composition of jet noise , 1969, Journal of Fluid Mechanics.

[13]  O. M. Phillips,et al.  On the generation of sound by supersonic turbulent shear layers , 1960, Journal of Fluid Mechanics.

[14]  G. Batchelor,et al.  The theory of homogeneous turbulence , 1954 .

[15]  H. S. Ribner,et al.  Refraction of Sound from a Point Source Placed in an Air Jet , 1965 .

[16]  Michael Fisher,et al.  The characteristics of the turbulence in the mixing region of a round jet , 1963, Journal of Fluid Mechanics.

[17]  G. Batchelor,et al.  The large-scale structure of homogenous turbulence , 1956, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[18]  M. Lighthill.  On sound generated aerodynamically I. General theory , 1952, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[19]  Peter Bradshaw,et al.  Turbulence in the noise-producing region of a circular jet , 1964, Journal of Fluid Mechanics.

[20]  R. G. Dorsch,et al.  Noise produced by a small-scale, externally blown flap , 1972 .

[21]  R. Kraichnan.  Pressure Field within Homogeneous Anisotropic Turbulence , 1956 .

[22]  J. Wills,et al.  On convection velocities in turbulent shear flows , 1964, Journal of Fluid Mechanics.