hydrodynamic noise

Design and analysis of hydrodynamic noise parameters system for measuring centrifugal pumps

离心泵水动力学噪声参数测控系统的设计与分析

Therefore , the research of cavity hydrodynamic noise is very significant .

因此，空腔水动噪声的研究非常必要，也为水下航行器的设计提供了理论指导。

Development of the Experimental System for Measuring the Hydrodynamic Noise in Centrifugal Pump

离心泵水动力噪声测试系统的研制

The method can be applied to the hydrodynamic noise testing facilities where there is stronger background noise and getting rather pure background noise as reference noise .

正好适用于水动力噪声试验设备，其中背景噪声强，而且可以得到比较纯净的背景噪声作为参考噪声。

Then the pipe system becomes the main noise resource of quite submarine , when propeller noise , hydrodynamic noise and machinery noise of facility base are controlled effectively .

指出螺旋桨噪声、水动力噪声和设备机座机械噪声被有效抑制后，管道系统便成为安静型潜艇的主要噪声源。

Machinery noise , propeller noise and hydrodynamic noise , the main vibration and noise resources of submarine are introduced systemically , and concrete control methods are discussed from the above three aspects .

系统介绍了潜艇振动噪声的主要来源：机械噪声、螺旋桨噪声和水动力噪声，并从这三个方面详细论述了具体的控制方法。

For the case of hydrodynamic noise , in which the range of the frequency-thickness product of interest is relatively low , the symmetric zero-order mode dominates the noise radiation .

对于水动力噪声情况，感兴趣的频率厚度乘积相当低，这时零阶对称模式对噪声辐射起主要作用。

Generally , when the Ma number is low , the hydrodynamic noise is mainly radiated by vibrating elastic structures excited by wall-pressure fluctuations beneath turbulent boundary layers ( TBL ) .

文章综述湍流边界层脉动压力的频率&波数谱模型、湍流脉动压力测量方法以及弹性结构受湍流脉动压力激励的外部区域场计算的研究进展。