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Porous metal body, notably of nickel and/or cobalt superalloy, for structures used to absorb noise generated or transmitted by aircraft engines
Porous metal body, notably of nickel and/or cobalt superalloy, for structures used to absorb noise generated or transmitted by aircraft engines
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机译:多孔金属体,尤其是镍和/或钴超合金的多孔金属体,用于吸收飞机发动机产生或传播的噪声的结构
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摘要
A porous metal body with two opposing main surfaces, able to reduce noise from an aircraft jet engine, has pores (1, 2) in the form of cylindrical channels emerging through the first of their ends into the engine casing and closed at their opposite ends. Each channel has a diameter (D) of between 0.1 and 0.3 mm and is situated, on at least a part of its length, at a minimal distance (e) from its closest neighbour of between 0.02 and 0.3 mm. The ration between the length and the diameter of the channels is of the order of 10 2. Independent claims are also included for: (1) an aircraft engine casing incorporating a sector made up of this porous body; (2) the fabrication of the porous body.
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