High intensity tone generation by axisymmetric ring cavities on training projectilesAn experimental investigation has been carried out on the production of high intensity tones by axisymmetric ring cavities. Maximum sound production occurs during a double resonance at Strouhal numbers which depend only on the local flow velocity independent of cavity location. Values of sound pressure of about 115 dB at 1 meter distance can be generated by axisymmetric ring cavities on projectiles moving at a relatively low flight speed equal to 65 m/s. Frequencies in the audible range up to several Kilo Hertz can be generated aeroacoustically.
Document ID
19850028677
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Parthasarathy, S. P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Cho, Y. I. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Back, L. H. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)