Definition of Lighthill's eighth power law
In aeroacoustics, Lighthill's eighth power law states that power of the sound created by a turbulent motion, far from the turbulence, is proportional to eighth power of the characteristic turbulent velocity, derived by Sir James Lighthill in 1952. This is used to calculate the total acoustic power of the jet noise. The law reads as
{\displaystyle W=K{\frac {\rho _{o}}{c_{o}^{5}}}L^{2}U^{8},}
is the acoustic power in the far-field,
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Frequently asked questions
What is Lighthill's eighth power law?
In aeroacoustics, Lighthill's eighth power law states that power of the sound created by a turbulent motion, far from the turbulence, is proportional to eighth power of the characteristic turbulent velocity, derived by Sir James Lighthill in 1952.