A numerical method dealing with anti-sound effect is presented to calculate nonlinear sound propagation in varying cross section area and hard-wall ducts with transonic flow and without acoustic shock waves . The effe...A numerical method dealing with anti-sound effect is presented to calculate nonlinear sound propagation in varying cross section area and hard-wall ducts with transonic flow and without acoustic shock waves . The effects of duct geometry , the flow Mach number at the throat, the sound source intensity at the inlet and the anti- sound intensity on the nonlinear sound propagation are discussed through several examples. It is also shown from the examples that there is an optimal anti-sound intensity at which a remarkable sound attenuation can be obtained at the exit.展开更多
基金Supported by National Natural Science Foundation of ChinaNational Education Commission Foundation of China
文摘A numerical method dealing with anti-sound effect is presented to calculate nonlinear sound propagation in varying cross section area and hard-wall ducts with transonic flow and without acoustic shock waves . The effects of duct geometry , the flow Mach number at the throat, the sound source intensity at the inlet and the anti- sound intensity on the nonlinear sound propagation are discussed through several examples. It is also shown from the examples that there is an optimal anti-sound intensity at which a remarkable sound attenuation can be obtained at the exit.
