Development and approbation of program provision for calculation of low frequency sound caused by gas pressure oscillations in ducts systems of power plants

Vibration and related with it mechanical noise of power plants and joining mechanical systems are the factors negatively impacted not only to the health of workers, but also to the durability, reliability, productivity and other parameters of power plants. Significant input into generation of vibration and of low frequency noise are bringing pressure oscillations in ducts. Some approaches and results of program provision development for calculation of low frequency gas pressure oscillations in ducts of power plants are described. Results of program provision approbation are presented. Using of suggested program provision may be useful for calculation and design of duct systems of power plants and allows increase the efficiency of low frequency oscillations reduction in ducts of power plants systems and noise and vibration negative impact.

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SOFTWARE DEVELOPMENT FOR ESTIMATION OF LOW FREQUENCY SOUND PROPAGATION IN GAS GUIDES OF POWER PLANTS TAKING TO ACCOUNT ACTIVE SOUND SOURCES

Journal of Dynamics and Vibroacoustics ◽

10.18287/2409-4579-2019-5-4-36-44 ◽

2020 ◽

Vol 5 (4) ◽

pp. 36-44

Author(s):

A V Vasilyev

Keyword(s):

Sound Source ◽

Power Plants ◽

Sound Propagation ◽

Combustion Engine ◽

Source Parameters ◽

Low Frequency ◽

Sound Sources ◽

Software Application ◽

Frequency Sound ◽

Exhaust Noise

This paper is devoted to the problems of modelling and calculation of propagation of low frequency sound in gas guides of power plants taking to account active sound sources. The structure of software for prediction and calculation of low-frequency sound propagation in gas guides have described. Software uses four-pole method and takes to account radiation from additional (active) sound course. By using software it is possible to estimate sound source parameters to provide efficient sound attenuation. Examples of software application to calculation of intake and exhaust noise of internal combustion engine are described. The results of calculations show the possibilities of four-pole method software using to design acoustically the parameters of gas guides and mufflers for the different fields of applications.

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Approaches and technical solutions of reduction of low frequency vibration caused by gas pressure oscillations in pipelines of piston compressors during suction process

2020 International Conference on Dynamics and Vibroacoustics of Machines (DVM) ◽

10.1109/dvm49764.2020.9243902 ◽

2020 ◽

Author(s):

Andrey V. Vasilyev

Keyword(s):

Low Frequency ◽

Gas Pressure ◽

Pressure Oscillations ◽

Low Frequency Vibration ◽

Technical Solutions

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ANALYSIS OF METHODS AND PRESENTATION OF RESULTS OF EXPERIMENTAL RESEARCH OF LOW FREQUENCY GAS DYNAMIC PULSATIONS IN PIPELINES OF POWER PLANTS

Akustika ◽

10.36336/akustika202141200 ◽

2021 ◽

pp. 200-204

Author(s):

Andrey Vasilyev

Keyword(s):

Experimental Research ◽

Power Plants ◽

Sound Pressure ◽

Dynamic Pressure ◽

Low Frequency ◽

Pressure Level ◽

Gas Pressure ◽

Pressure Pulsations ◽

Gas Dynamic ◽

Experimental Researches

The results of analysis of Russian approaches and of experience of development of methods and of results of experimental research of low-frequency gas dynamic pressure pulsations in pipelines of power plants are described. Peculiarities of Russian standards and of the sanitary norms are considered. According to results of experimental researches is possible to conclude that the maximal vibration levels are observed on the frequencies 31,5 Hz and 40 Hz. The same results were obtained during the measurements of sound pressure level on the same experimental compressor mount. Earlier during the experiments on the same mount it was achieved that the maximal values of low frequency gas pressure pulsations are observed on the frequency 35 Hz. Thus, it was experimentally shown that gas pressure pulsations are making the main contribution into forming of low frequency sound and vibration of compressor mount.

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