Pressure pulsations in piping systems excited by a centrifugal compressor (2nd report, effect of operating conditions on damping characteristics)

Itsuro Hayashi, Shigehiko Kaneko

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Damping of pressure pulsations in piping systems excited by centrifugal compressors or blowers at blade-passing frequency dominates acoustic resonant characteristics. In this study, the relation between the resistance coefficient of the compressor and the operating point was investigated experimentally. As a result, the resistance coefficient of the compressor depends on the Reynolds number defined by the equivalent velocity of the pulsating flow. It is shown that the pressure pulsations in piping systems can be evaluated by one-dimensional wave model taking into account the damping characteristics of the compressor. The suppression of the pulsation by installing the orifice plate under resonant conditions is discussed in terms of the ratio of the damping force by the orifice plate to the excitation force.

Original languageEnglish
Pages (from-to)650-657
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume74
Issue number3
Publication statusPublished - 2008 Mar 1
Externally publishedYes

Fingerprint

Centrifugal compressors
Piping systems
Compressors
Damping
Orifices
Blowers
Turbomachine blades
Reynolds number
Acoustics

Keywords

  • Blade passing frequency
  • Centrifugal compressor
  • Centrifugal fan
  • Damping
  • Pressure pulsation
  • Resistance coefficient

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "Damping of pressure pulsations in piping systems excited by centrifugal compressors or blowers at blade-passing frequency dominates acoustic resonant characteristics. In this study, the relation between the resistance coefficient of the compressor and the operating point was investigated experimentally. As a result, the resistance coefficient of the compressor depends on the Reynolds number defined by the equivalent velocity of the pulsating flow. It is shown that the pressure pulsations in piping systems can be evaluated by one-dimensional wave model taking into account the damping characteristics of the compressor. The suppression of the pulsation by installing the orifice plate under resonant conditions is discussed in terms of the ratio of the damping force by the orifice plate to the excitation force.",
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AU - Kaneko, Shigehiko

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N2 - Damping of pressure pulsations in piping systems excited by centrifugal compressors or blowers at blade-passing frequency dominates acoustic resonant characteristics. In this study, the relation between the resistance coefficient of the compressor and the operating point was investigated experimentally. As a result, the resistance coefficient of the compressor depends on the Reynolds number defined by the equivalent velocity of the pulsating flow. It is shown that the pressure pulsations in piping systems can be evaluated by one-dimensional wave model taking into account the damping characteristics of the compressor. The suppression of the pulsation by installing the orifice plate under resonant conditions is discussed in terms of the ratio of the damping force by the orifice plate to the excitation force.

AB - Damping of pressure pulsations in piping systems excited by centrifugal compressors or blowers at blade-passing frequency dominates acoustic resonant characteristics. In this study, the relation between the resistance coefficient of the compressor and the operating point was investigated experimentally. As a result, the resistance coefficient of the compressor depends on the Reynolds number defined by the equivalent velocity of the pulsating flow. It is shown that the pressure pulsations in piping systems can be evaluated by one-dimensional wave model taking into account the damping characteristics of the compressor. The suppression of the pulsation by installing the orifice plate under resonant conditions is discussed in terms of the ratio of the damping force by the orifice plate to the excitation force.

KW - Blade passing frequency

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KW - Centrifugal fan

KW - Damping

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