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2. 发明申请

US20070227153A1 Flow control redistribution to mitigate high cycle fatigue 有权
标题翻译：流量控制重新分配以减轻高周期疲劳
公开(公告)号：US20070227153A1
公开(公告)日：2007-10-04
申请号：US11418336
申请日：2006-05-04
申请人： Philip Truax
发明人： Philip Truax
IPC分类号： F02C1/00
CPC分类号： F02C7/04 , F05D2270/18 , Y10S415/914 , Y10T137/0536 , Y10T137/0645
摘要： The present invention provides a method operable to improve pressure recovery and/or distortion within engine inlet. This method involves providing a first fluid flow to primary jet vortex generator(s) operable to inject fluid at a first injection rate into a boundary layer of a primary fluid flow within the inlet. A secondary fluid flow is injected by secondary jet vortex generator(s) at a second injection rate into the boundary layer of the primary fluid flow. The fluid injected at the first injection rate and second injection rate is operable to induce secondary flow structures within the boundary layer. These secondary close structures are then operable to improve or manipulate the pressure recovery of the inlet. At specific engine conditions, this method may redistribute the ratio of the first injection rate and second injection rate in order to improve pressure recovery and/or distortion of the inlet when the particular engine conditions. Such engine conditions may be associated with a natural blade frequency of the engine at a particular speed. Embodiments of the invention allow blade vibration problems associated with engine operation at particular speeds to be solved without adding damping or increasing blade strength to change the natural frequency of the blades, thereby reducing weight and improving engine performance.
摘要翻译：本发明提供了一种可以改进发动机入口内的压力恢复和/或变形的方法。该方法包括向初级喷射涡流发生器提供第一流体流，其可操作以将流体以第一注入速率注入入口内的主流体流的边界层。第二流体流以第二喷射速率被二次喷射涡流发生器注入到主流体流的边界层中。以第一注射速率和第二注射速率注入的流体可操作以在边界层内引发二次流动结构。然后，这些二次闭合结构可操作以改善或操纵入口的压力恢复。在特定发动机条件下，该方法可以重新分配第一喷射速率和第二喷射速率的比率，以便在特定的发动机条件下改善进气口的压力恢复和/或变形。这种发动机条件可以以特定速度与发动机的天然叶片频率相关联。本发明的实施例允许解决与特定速度下的发动机操作相关的叶片振动问题，而不增加阻尼或增加叶片强度以改变叶片的固有频率，从而减轻重量并改善发动机性能。

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