Abstract
Proudman's derivation for noise generation by isotropic turbulence is extended to the case of nonisotropic turbulent flows, in accordance with his original suggestions as presented in his paper. The rate at which energy is being supplied to the turbulent regions from an external source is derived using the energy equation and the equation of state for water. Theoretical approaches are derived for the case of noise generation in a pipe, constriction and water discharge into a stagnant reservoir. These considerations indicate that the acoustic intensities for these cases vary as U6.75, U5and U8, respectively.
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