EVALUATION OF THE TONE NOISE OF A FAN ON THE BASIS OF THE 3D COMPUTATION OF ROTOR-STATOR INTERACTION

摘要

The results of the evaluation of the intensity of the tone component of the fan noise in a bypass turbofan engine at approach working conditions in flight and in the absence of flow are presented. The evaluation was conducted on the basis of data obtained in the three-dimensional (3D) unsteady computation of the tone noise of a high bypass ratio fan of the turbofan designed for a medium-range, single-aisle civil aircraft with two engines. The computation was performed using the 3D acoustics solver (3DAS) software complex developed at the Central Institute of Aviation Motors (CIAM) and created for simulation of turbomachinery tone noise. An evaluation of the relative contribution of the fan tone noise to the engine noise is also presented.