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Effect of helical cables on cylinder noise control

机译:螺旋电缆对气缸噪音控制的影响

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This paper presents a parametric study on the far-field noise control effect of a circular cylinder with helical cables wrapping along cylinder span, aiming at finding an optimal operation condition for this treatment. Experimental results reveal that the noise control efficiency of this treatment is highly dependent on the non-dimensional thread pitch and cable density. The noise control efficiency gradually increases with the non-dimensional thread pitch and cable density increasing when both values are smaller than critical values. Further increasing the values of the two parameters, the control efficiency cannot increase any more. By choosing the optimal parameters of helical cables, both tonal and broadband noise can be remarkably suppressed, and the overall sound pressure level can be reduced by as large as 17 dB. (C) 2017 Elsevier Ltd. All rights reserved.
机译:本文对带有螺旋电缆的圆柱沿圆柱跨度缠绕的远场噪声控制效果进行了参数研究,旨在为这种处理找到最佳的工作条件。实验结果表明,该处理的噪声控制效率高度依赖于无量纲的螺距和电缆密度。当两个值均小于临界值时,噪声控制效率会随着无量纲螺距和电缆密度的增加而逐渐增加。进一步增加两个参数的值,控制效率将不再增加。通过选择螺旋电缆的最佳参数,可以显着抑制音调和宽带噪声,并且可以将整体声压级降低多达17 dB。 (C)2017 Elsevier Ltd.保留所有权利。

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