| 摘要 |
An apparatus and method for silencing marine engines. In one embodiment, a separation chamber receives a fluid mixture of exhaust gas and liquid coolant and a dynamic separation member separates the exhaust gas from the liquid coolant. In one aspect of the invention, a horizontal axial-flow silencer includes a separation plate, having at least one dynamic separator, horizontally positioned in the separation chamber. A dam maintains the free surface of the fluid mixture at or slightly above the separation plate at an engine speed within nominal operating range, and provides for the continuing passage of exhaust gas through the liquid coolant. The separation plate employs inertial effects introduced by a series of vanes that deflect the gas-coolant mixture upstream to separate the coolant with a greater inertia from the exhaust gas with a lesser inertia. Alternatively, the separation plate may consist of a mesh pad that employs frictional effects to achieve a similar result. The separated exhaust gas is passed through a resonator tube or tubes to further attenuate the acoustic energy of the gas. The resonator tubes may be oriented to impart angular momentum to further dry and purify the gas by the centrifigal separation of remaining liquid coolant or particulate matter from the exhaust gas. The separated exhaust gas and liquid coolant may be separately expelled from the silencer, or they may be recombined in an expulsion chamber of the silencer to be exhausted through a single tube. |
