An advanced time approach for acoustic analogy predictions

摘要: Abstract This paper deals with a new interpretation of the retarded time approach that is widely used in prediction acoustic fields from moving sources. A hierarchical inversion between emission and reception leads to advanced approach. consists projecting current status source observer domain where received signal progressively built. The practical relevance this methodology lies on two statements: no equations must be solved; an aerodynamic noise can processed parallelly computation. Theoretically, differs only one aspect. emitted at given instant by point source, subsonic as well supersonic velocity, velocity. Consequently, value corresponds time. herein applied solution Ffowcs Williams Hawkings equation proposed Farassat. radiated elementary sources complex motion then computed checked against analytical solutions.