Influence of shell shape on flow and acoustic parameters of a steam silencer

• Autorzy: Gaj Patryk , Sobczak Krzysztof , Kopania Joanna , Wójciak Kamil

Identyfikatory

DOI

10.24425/ather.2021.139655

• Języki publikacji: EN

Abstrakty

EN

Steam discharge produces noise due to rapid expansion and a temperature drop of ejected steam. This is why steam silencers are used to change one-stage into multi-stage expansion, which reduces the intensity of pressure and temperature drop during this process and shifts emitted noise into higher frequencies, which are easier to dampen. This paper presents a flow-acoustic numerical model of a steam silencer. It is meant to help to obtain a precise analysis of phenomena occurring in steam silencers and improve the process of designing this type of device. The model described in this paper was based on the parameters of a real working unit manufactured in the Institute of Power Engineering – Thermal Technology Branch. Most of the steam silencers are designed based on construction guidelines that have not been changed for a long time. This restrained an increase in the acoustics efficiency of the steam silencers. An improvement of their flow and acoustic properties allows for the development of smaller, more efficient, and lighter construction. The current version of the model was used for the analysis of flow and acoustic changes which occur after modifying the lower region of a shell of the steam silencer. The proposed modification allowed for a 19% increase in mass flow rate through the silencer and noise reduction in the low-frequency range.

Słowa kluczowe

EN

acoustics; CFD; noise emission; steam silencer

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2021
• Tom: Vol. 42, no 4
• Strony: 141--154
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Gaj Patryk

• Institute of Power Engineering, Mory 8, 01-330 Warsaw, Poland

autor

Sobczak Krzysztof

• Lodz University of Technology, Wólczańska 219, 90-924 Lodz, Poland

autor

Kopania Joanna

• Lodz University of Technology, Piotrkowska 266, 90-924 Lodz, Poland

autor

Wójciak Kamil

• Institute of Power Engineering, Mory 8, 01-330 Warsaw, Poland

Bibliografia

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