Broadband noise prediction models and measurements of tip leakage flows
Broadband noise prediction models and measurements of tip leakage flows
复制标题
宽带噪声预测模型和尖端泄漏流测量
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Camussi
中科院分区：
文献类型：
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作者：
J. Grilliat;E. Jondeau;Marc C. Jacob;M. Roger;R. Camussi
研究了叶尖泄漏流及其相关宽带噪声产生的进一步实验分析。基于同时进行的二维LDA、非定常壁压和远场测量，远场频谱中的低频域与叶尖泄漏涡及其与叶尖的相互作用有关。对吸力面边缘探测到的结构对流进行了研究。描述了一种模拟低频宽带噪声产生的尝试。基本的理论，基于线性非定常空气动力学，沿着与第一个T结果。本文还介绍了一种在较高频率范围内进行宽带噪声预测的方法。
Further experimental analysis of a tip leakage flow and of its associated broadband noise generation is investigated. Based on simultaneous 2 D LDA, unsteady wall pressure and far field measurements, a low frequency domain in the far field spectrum is related to the tip leakage vortex and its interaction with the blade t ip. A study on the convection of structures detected at the suction side edge is presented. An attempt to model the low frequency broadband noise generation is described. The underlying theory, based on linearised unsteady aerodynamics, is presented along with firs t results. An approach for broadband noise prediction in a higher frequency range is als o described.