Alteration of Jet Noise by Jet Plume Deflection

摘要

THE effect of deflecting the jet plume on jet noise is examined. The idea of canting the nozzle and thereby vectoring the jet plume in order to obtain noise reduction has been proposed in the past. The changes to the noise field due to such a modification are assessed. Viswanathan [1-3], among others (see [4-6] for example), sought to alter the noise radiation through the use of a beveled nozzle. Figure 1 shows an illustration of a beveled round nozzle. The measurement conventions for the bevel as well as the polar and azimuthal angles are also indicated. The bottom portion depicts