Study of flow instability in off design operation of a multistage centrifugal pump

Akiha Shibata; Hideto Hiramatsu; Shutaro Komaki; Kazuyoshi Miyagawa; Manabu Maeda; Shun Kamei; Ryota Hazama; Takeshi Sano; Masamichi Iino

doi:10.1007/s12206-016-0101-1

Study of flow instability in off design operation of a multistage centrifugal pump

Akiha Shibata, Hideto Hiramatsu, Shutaro Komaki, Kazuyoshi Miyagawa^*, Manabu Maeda, Shun Kamei, Ryota Hazama, Takeshi Sano, Masamichi Iino

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

In recent years, attempts have been made to make multistage centrifugal pumps smaller in size and more efficient. However, such designs are known to cause positive-slope phenomena in the Q-H curve, especially under low-flow conditions. These phenomena, which have thus far been studied experimentally and numerically, stem from flow instability in the pump. However, their mechanisms have not yet been clarified because it depends on various parameters. In this study, we focused on diffuser rotating stall, observed in positive Q-H characteristics. This study elucidates the mechanism of positive-slope generation through experimental results and two-dimensional numerical analysis.

Original language	English
Pages (from-to)	493-498
Number of pages	6
Journal	Journal of Mechanical Science and Technology
Volume	30
Issue number	2
DOIs	https://doi.org/10.1007/s12206-016-0101-1
Publication status	Published - 2016 Feb 1

Keywords

Centrifugal pump
Flow instability
Off design operation
Rotating stall

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials

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10.1007/s12206-016-0101-1

Cite this

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abstract = "In recent years, attempts have been made to make multistage centrifugal pumps smaller in size and more efficient. However, such designs are known to cause positive-slope phenomena in the Q-H curve, especially under low-flow conditions. These phenomena, which have thus far been studied experimentally and numerically, stem from flow instability in the pump. However, their mechanisms have not yet been clarified because it depends on various parameters. In this study, we focused on diffuser rotating stall, observed in positive Q-H characteristics. This study elucidates the mechanism of positive-slope generation through experimental results and two-dimensional numerical analysis.",

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T1 - Study of flow instability in off design operation of a multistage centrifugal pump

AU - Shibata, Akiha

AU - Hiramatsu, Hideto

AU - Komaki, Shutaro

AU - Miyagawa, Kazuyoshi

AU - Maeda, Manabu

AU - Kamei, Shun

AU - Hazama, Ryota

AU - Sano, Takeshi

AU - Iino, Masamichi

PY - 2016/2/1

Y1 - 2016/2/1

N2 - In recent years, attempts have been made to make multistage centrifugal pumps smaller in size and more efficient. However, such designs are known to cause positive-slope phenomena in the Q-H curve, especially under low-flow conditions. These phenomena, which have thus far been studied experimentally and numerically, stem from flow instability in the pump. However, their mechanisms have not yet been clarified because it depends on various parameters. In this study, we focused on diffuser rotating stall, observed in positive Q-H characteristics. This study elucidates the mechanism of positive-slope generation through experimental results and two-dimensional numerical analysis.

AB - In recent years, attempts have been made to make multistage centrifugal pumps smaller in size and more efficient. However, such designs are known to cause positive-slope phenomena in the Q-H curve, especially under low-flow conditions. These phenomena, which have thus far been studied experimentally and numerically, stem from flow instability in the pump. However, their mechanisms have not yet been clarified because it depends on various parameters. In this study, we focused on diffuser rotating stall, observed in positive Q-H characteristics. This study elucidates the mechanism of positive-slope generation through experimental results and two-dimensional numerical analysis.

KW - Centrifugal pump

KW - Flow instability

KW - Off design operation

KW - Rotating stall

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Study of flow instability in off design operation of a multistage centrifugal pump

Abstract

Keywords

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