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Effects of Vane Sweep on Fan-Wake/Outlet-Guide-Vane Interaction Broadband Noise

机译:叶片扫描对风扇/尾气/导气叶片相互作用宽带噪声的影响

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A method is developed for predicting broadband noise due to the fan-wake interacting with the downstream swept outlet-guide-vanes in turbofan jet engines. It is validated against the NASA Source Diagnostic Test data. Sweep effects on the source, on the response and on the unsteady lift coupling with the duct modes are discussed. The mechanisms of broadband noise reduction due to vane sweep are studied, and a simple model to account for sweep effects is proposed accordingly.
机译:开发了一种用于预测由于风扇尾流与涡轮风扇喷气发动机中的下游扫掠出口导向叶片相互作用而引起的宽带噪声的方法。已根据NASA来源诊断测试数据进行了验证。讨论了扫频对源,响应以及与管道模式耦合的非稳态升程的影响。研究了叶片扫掠引起的宽带降噪机制,并据此提出了一个简单的模型来考虑扫掠效应。

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