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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Sound Suppression of Laminar Separating Flow over Cavity
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Sound Suppression of Laminar Separating Flow over Cavity

机译:腔内层流分离的声音抑制

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摘要

A passive control of aerodynamic noise generated by a laminar separating flow over a cavity is carried out in a wind tunnel test and by numerical simulation, using a thin plate inserted into the cavity as a passive flow-controlling device. In the experiment, a noise suppression effect up to 14 dB is achieved by placing a plate in a proper location. It is shown that a plate of smaller vertical size is more effective. In the numerical simulation, it is shown that the location where the shear layer rolls up and the path of vortices are both very sensitive to plate position.
机译:在风洞试验中,通过数值模拟对由层流在腔上的层流分离产生的空气动力噪声进行被动控制,并使用插入腔中的薄板作为被动流量控制装置。在实验中,通过将板放置在适当的位置可获得高达14 dB的噪声抑制效果。结果表明,垂直尺寸较小的板更有效。在数值模拟中,表明剪切层卷起的位置和涡旋路径都对板位置非常敏感。

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