An exhaust ejector for an auxiliary power device of an aircraft includes a tapered section having a radial dimension tapering in a flow direction of an airflow and a gentle section continuing to the tapered section, the tapered section including a first outer panel and a first inner panel spaced apart by a radial distance, the exhaust ejector further comprises a first noise reduction structure arranged on the gradually-shrinking section, the first noise reduction structure comprises a plurality of first noise reduction chambers, the first noise reduction chambers are arranged in the gradually-shrinking section, the first noise reduction chambers are arranged in the gradually-shrinking section, and the second noise reduction chambers are arranged in the gradually-shrinking section. Each of the first noise reduction chambers is defined by a part of the first outer panel, a part of the first inner panel and a first side wall extending from the first outer panel to the first inner panel; and a second noise reduction structure disposed at the gentle section, the second noise reduction structure including a sound absorption panel constituting a second inner panel. The exhaust ejector has the broadband noise reduction function, and the sound absorption effect can be effectively improved.
一种排气引射器,其用于飞行器的辅助动力装置,包括径向尺寸沿气流流动方向渐缩的渐缩部段和延续于渐缩部段的平缓部段,渐缩部段包括第一外面板和第一内面板,第一外面板和第一内面板隔开一段径向距离,且该径向距离沿气流流动方向渐缩,平缓部段包括第二外面板和第二内面板,其中,排气引射器还包括:布置于渐缩部段的第一降噪结构,该第一降噪结构包括多个第一降噪室,其中,第一降噪室中的每一个由第一外面板的一部分、第一内面板的一部分和从第一外面板延伸到第一内面板的第一侧壁围绕形成;以及布置于平缓部段的第二降噪结构,该第二降噪结构包括构成第二内面板的吸声面板。这种排气引射器具备宽带降噪功能,能有效提升吸声效果。
Exhaust ejector
排气引射器
2024-04-12
Patent
Electronic Resource
Chinese
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