叶片数对高频船用推进器噪声的影响:模型试验数据

V. Bushkovsky, Y. Yegorov
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引用次数: 0

摘要

研究对象和目的。本文讨论了螺旋桨和喷水器的叶片系统。本研究的目的是概述减轻船用推进器高频非空化噪声的方法。主题和方法。该研究分析了俄罗斯和外国关于螺旋桨和箔片系统的空气声学和水声学的出版物。它还确定了螺旋桨叶片上湍流边界层的参数及其对螺旋桨噪声辐射的影响。箔片系统空气动力学的噪声评估方法已应用于船舶推进器。主要结果。理论研究表明,叶片较少的船用螺旋桨往往具有较低的高频噪声辐射。在这项研究中对推进器模型进行的直接噪声测量证实了这一趋势。结论与低频螺旋桨噪声相比,通过减少螺旋桨叶片数量可以实现高频声辐射。
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Blade number effect upon high-frequency marine propulsor noise: model test data
Object and purpose of research. This paper discusses blade systems of propellers and water jets. The purpose of the study was to outline the ways to mitigation of high-frequency non-cavitation noise of marine propulsors. Subject matter and methods. The study analyses Russian and foreign publications on aero- and hydroacoustics of propellers and foil systems. It also determines the parameters of turbulent boundary layer on propeller blades with respect to its effect upon propeller noise radiation. Noise assessment methods obtained for aerodynamics of foil systems have been applied to marine propulsors. Main results. Theoretical studies have shown that marine propellers with fewer blades tend to have lower radiation of high-frequency noise. Direct noise measurements of propulsor models performed under this study have confirmed this trend. Conclusion. In contrast to the low-frequency propeller noise, high-frequency acoustic radiation can be achieved through reduction of propeller blade number.
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