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Assembly and method for fan noise reduction from turbofan engines using dynamically adaptive Herschel-Quincke tubes
Assembly and method for fan noise reduction from turbofan engines using dynamically adaptive Herschel-Quincke tubes
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机译:使用动态自适应Herschel-Quincke管降低涡轮风扇发动机风扇噪声的组件和方法
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摘要
An assembly useful in reducing aircraft engine noise such as turbofan engine noise (730) comprises: (1) at least one tube “H-Q” having an inlet end (738), an outlet end (740) and a central tube portion therebetween; an (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube. The assembly of this invention may be used in a method for reducing noise, the method comprising: (a) providing means for generating non-uniform noise energy about an inner surface and within a disclosure having at least an inlet; (b) providing an assembly for reducing noise comprising; (i) at least one tube having an inlet end, an outlet end and a central tube portion therebetween, and (ii) at least one actuator operatively interconnected to at least one tube, wherein the actuator is capable of causing dynamic response by the tube; and (c) directing at least a portion of the non-uniform noise into the assembly.
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