Aeroacoustic investigations of subsonic jet in PNRPU anechoic chamber

A study of the aeroacoustic characteristics of the PNRPU jet rig is considered. The design of the jet rig is described. The velocity of the jet along the axis is measured at a certain distance from the nozzle exit section. The comparison of the velocity with a semi-empirical model is performed. A good agreement of the velocities is observed. The noise of the jet is measured for different velocities in the direction of 30 and 90 degrees. The obtained spectra are compared with the results of measurements of the jet rig in the anechoic chamber AC-2 TsAGI. Localization of the noise sources of the jet with the Bruel & Kjaer microphone array is also carried out. The investigations are carried out in a new anechoic chamber at PNRPU.