Developments of the K-Algorithm in the Computation of the HSI Noise from Rotors and propellers

This paper describes the developments and improvements of the K-Algorithm, a numerical procedure developed to model the retarded configuration of a supersonic rotating surface. The algorithm has been recently reviwed in order to reduce the requested CPU time and to treat some advanced (rotor and propeller) configurations. The effectiveness and robustness of the new procedure will be tested by examining four different configurations and determining the time evolution of the corresponding acoustic domain.