Implementation of new turbulence spectra in the lighthill analogy source terms

The industry-standard MGB approach to predicting the noise generated by a g iven aerodynamic Row field requires that the turbulence velocity correlatio n be specified so that the source terms in the Lighthill acoustic analogy m ay be computed. The velocity correlation traditionally used in MGB computat ions is inconsistent with a number of basic qualitative properties of turbu lent flows. In the present investigation, the effect on noise prediction of using two alternative velocity correlations is examined. (C) 2001 Academic Press.