The paper shows the results of the experimental study of rotor noise. The research was performed in a noise-attenuated chamber. Rotors of F7/A7 design were printed on a 3D printer. The rotors were investigated at speeds up to 10000 rpm. The model rotors are up to 0.16 m in diameter. Noise registration of the isolated rotors showed the presence of a tonal and broadband noise component. Noise of coaxial counter-rotating open rotors is dominated by a broadband component. The contribution of the noise characteristics of commutator-less electric motors used in the experiments to the broadband noise of rotors is shown. The contribution of experimental commutatorless motors to the rotor noise characteristic is determined.
acoustic far-freld measurements, broadband noise
1. Grinyok, A., Boychuk, I., Perelygin, D., Dantsevich, I. 2018 Simulation in production of open rotor propellers: From optimal surface geometry to automated control of mechanical treatment IOP Conference Series: Materials Science and Engineering, 327 (2), 022038.
2. Zamtfort B.S. Dvigatel' s otkrytym rotorom v svete uzhestocheniya trebovaniy po aviaekologii//Izvestiya Samarskogo nauchnogo centra RAN,- 2012,- t. 14,- №6,- S. 307-308.
3. Open Rotor Engine. Aeroacoustic Technology. Final Report. Continuous Lower Energy, Emissions and Noise (CLEEN) Program. Submitted by General Electric. DOT/FAA/AEE2014-04 /by the FAA’s Office of Environment and Energy.
4. Whitfield, C. E., Manl, R., Gllebe, P.R (1990) Eligh Speed Turboprop Aeroacoustic Study (Counterrotation). Volume I - Model Development. NASA Contractor Report 185241
5. Grinek A.B., Boychuk I.P., Kosolap Yu.E Cifrovoe modelirovanie v zhiznennom cikle izdeliy i avtomatizacii tehnologicheskih processov sudostroeniya // Ekspluataciya morskogo transporta,- 2019-№4 (93).- S. 100-114.
6. Truong A., Papamoschou D. Aeroacoustic Testing of Open Rotors at Very Small Scale. AIAA 2013-0217.
