A Theoretical Basis for the Scaling Law of Broadband Shock Noise Intensity in Supersonic Jets

Abstract

A theoretical basis for the scaling of broadband shock noise intensity in supersonic jets was formulated considering linear shock‐shear wave interaction. Modeling of broadband shock noise with the aid of shock‐turbulence interaction with special reference to linear theories is briefly reviewed. A hypothesis has been postulated that the peak angle of incidence (closer to the critical angle) for the shear wave primarily governs the generation of sound in the interaction process with the noise generation contribution from off‐peak incident angles being relatively unimportant. The proposed hypothesis satisfactorily explains the well‐known scaling law for the broadband shock‐associated noise in supersonic jets.