Pressure pulsations in piping system excited by a centrifugal turbomachinery taking the damping characteristics into consideration

I. Hayashi*, S. Kaneko

*この研究の対応する著者

研究成果: Article査読

50 被引用数 (Scopus)

抄録

Pressure pulsations excited by a centrifugal turbomachinery such as compressor, fan or pump at the blade passing frequency may cause severe noise and vibrations in piping system. Therefore, the practical evaluation method of pressure pulsations is strongly recommended. In particular, the maximum pressure amplitude under the resonant conditions should be appropriately evaluated. In this study, a one-dimensional excitation source model for a compressor or pump is introduced based on the equation of motion, so as to incorporate the non-linear damping proportional to velocity squared in the total piping system including the compressor or pump. The damping characteristics of the compressor or pump are investigated by using the semi-empirical model. It is shown that the resistance coefficient of the compressor or pump depends on the Reynolds number that is defined using the equivalent velocity of the pulsating flow. The frequency response of the pressure amplitude and the pressure distribution in the piping system can be evaluated by introducing the equivalent resistance of the compressor or pump and that of piping system. In particular, the relation of the maximum pressure amplitude in piping system to the location of the excitation source under resonant conditions can be evaluated. Finally, the reduction of the pressure pulsations by use of an orifice plate is discussed in terms of the pulsation energy loss.

本文言語English
ページ(範囲)216-234
ページ数19
ジャーナルJournal of Fluids and Structures
45
DOI
出版ステータスPublished - 2014 2月
外部発表はい

ASJC Scopus subject areas

  • 機械工学

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