A. LUTSKIY et al./Numerical simulation for problems of aerodynamics… NUMERICAL SIMULATION FOR PROBLEMS OF AERODYNAMICS ON MULTIPROCESSOR COMPUTING SYSTEMS

jet noise. Abstract. The renewed interest in the high-speed transport program has created a need for information on wing-tip vortices in supersonic flows. The comparative analysis of experimental and numerical data for M=3 α =10 ° has shown that computations can predict as a whole qualitative flow pattern in the wing wake. Jet flows have been a subject of intensive theoretical, numerical, and experimental investigations during last several decades. This interest in the first turn concerns the mechanisms of strong noise generated by high-speed jets, in particular very intense tones known as screech. The Euler model has been applied to investigate numerically a supersonic underexpanded jet flow. The numerical simulations have shown the phenomenon of helical instability. The basic result of the present study is that the main mechanism of the screech tone in supersonic underexpanded jets has the nature of blade/vortex interaction in the sound generated by propellers