Kryuchkov A. N., Shakhmatov E. V., Samsonov V. N., Druzhin A. N., Makaryants G. M.
The main task in the course of hydraulic system of ship power plants construction is to suppress fluid-borne noise. One way to get around this problem is the application of the pressure pulsation dampener. The dampener is the device that filters acoustics pulsation in working fluid and scatters their energy. However the existing methods of pressure pulsation dampener design do not take into ac-count the processes of noise formation due the vortexes on its elements. This fact causes the significant decline of the dampener efficiency under the rise of the flow rate conditions. In this work the new method of pressure pulsation dampener design is presented. The main difference of developed method from traditional ones is the modeling of vortex flux in the diffuser of dampener central duct and fluid-borne nose occurring in such condition. The use of the method allows to define the process pattern of unsteady flux generation in the diffuser. It has been shown that the field of the maximum of the root-mean-square pressure pulsation located near the wall at the inlet part of the dampener diffuser. The frequency vs pressure pulsation in the diffuser curve has been simulated. The developed design method of the pressure pulsation dampener allowed to achieve mean value of insertion losses coefficients equal to 10.6 in the frequency band of 5 Hz to 1 000 Hz under the velocity of the working fluid up to 30 m/s.