Numerical Simulation of Noise Characteristics of Open Rotor

Abstract In order to investigate the noise characteristics of open rotor, numerical simulation was performed for an rotor which contains 11 blades front row and 9 rear row. The aerodynamic compared with a single propeller, i.e. propeller. Numerical results show that predicted field agree well literature. spectrum is obviously more complex higher than addition, contribution different generation mechanisms studied interaction noise. Results blade tip vortex wake are main while hub contributes less Blade need be paid attention. investigation result may help develop relevant reduction techniques rotor.