Characteristics of screech and transonic tones in jet flows

This paper demonstrates the screech and transonic tonal characteristics from circular jets emerging from orifice. It is well understood that the former is due to the feedback mechanism between the hydrodynamic convection of fluid structures, and the upstream propagating acoustic waves leading to a narrow band, large amplitude tonal noise. Other interesting tones are formed during the transonic regime of Mach numbers. Such tones are not much intense, however initiates with a large number of non-linear tones. This paper describes the characteristics of screech and transonic tones generated from the jet flows.