IMPLEMENTATION OF NEW TURBULENCE SPECTRA IN THE LIGHTHILL ANALOGY SOURCE TERMS

The industry-standard MGB approach to predicting the noise generated by a given aerodynamic flow field requires that the turbulence velocity correlation be specified so that the source terms in the Lighthill acoustic analogy may be computed. The velocity correlation traditionally used in MGB computations is inconsistent with a number of basic qualitative properties of turbulent flows. In the present investigation, the effect on noise prediction of using two alternative velocity correlations is examined.