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Numerical Estimation and Validation of Pressure Pulsation in Centrifugal Pump Discharge Pipes

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Fluid Mechanics and Fluid Power, Volume 3 (FMFP 2022)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Pressure pulsation is inherently present in all centrifugal pumps because of the rotor–stator interaction of impeller and volute. But its higher value may cause trouble in the performance and operation of the centrifugal pump. The experimental method traditionally investigates pressure pulsation, but the advancements in numerical and CFD methods allow us to explore this effect easily. The Tetra/Mixed grid method was used for meshing in ICEM CFD to investigate the transient variation of pressure pulsation. The analysis involves a parametric study in which parameters related to the impact of the cutwater gap (Gap-B) and variable frequency drives on pressure pulsation. The four Gap-B% and four pump speeds were used for analysis of pressure pulsation. Total 8 monitor points were placed in discharge pipes including point at half and quarter wavelength to measure pulsation on the discharge side. From analysis it was observed that Gap-B% had a greater impact on pressure pulsation and an increase in speed also results in significant pulsation. A non-dimensional number was used to compare the results with the experimental method and the results were found to be comparable. Gap-B of 9% and above was found to be optimal since pressure pulsation was less.

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Abbreviations

Gap-B:

Radial gap between the impeller tip and cutwater (%)

\(D_{2}\) :

Impeller outlet diameter (mm)

\(D_{3}\) :

Cutwater diameter (mm)

L1:

Monitor point at 1 m length (–)

ρ:

Density of water (kg/m3)

\(C_{P}\):

Coefficient of pressure pulsation (–)

∆P%:

Pressure pulsation percentage (%)

P:

Pressure (Pa)

\(\overline{P}\):

Average pressure of impeller in one rotation period (Pa)

µ, \(\mu_{t}\):

Dynamic and turbulent viscosity (Pa s)

\(F_{i}\):

Source term (–)

k:

Turbulent kinetic energy (J)

atm:

Atmospheric pressure (Pa)

u:

Peripheral velocity at impeller outlet (m/s)

∆P:

Pressure difference (Pa)

\(\Delta P_{{{\text{RMS}}}}\):

Root mean square value of pressure difference (Pa)

\(P_{{{\text{BEP}}}}\):

Pressure at best efficiency point (Pa)

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Acknowledgements

KSB Limited provided continuous support for this project.

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Authors and Affiliations

  1. Engineering—PPD, KSB Limited, Pune, Maharashtra, 411019, India

    Vishal V. Ghatbandhe, Vishal V. Ghatbandhe, Pankaj P. Mahajan, Ranjit H. Gavhane & Anmol Sharma

Authors
  1. Vishal V. Ghatbandhe
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  2. Pankaj P. Mahajan
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  3. Ranjit H. Gavhane
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  4. Anmol Sharma
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Corresponding author

Correspondence to Vishal V. Ghatbandhe .

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Editors and Affiliations

  1. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Krishna Mohan Singh

  2. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Sushanta Dutta

  3. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Sudhakar Subudhi

  4. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Nikhil Kumar Singh

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Ghatbandhe, V.V., Mahajan, P.P., Gavhane, R.H., Sharma, A. (2024). Numerical Estimation and Validation of Pressure Pulsation in Centrifugal Pump Discharge Pipes. In: Singh, K.M., Dutta, S., Subudhi, S., Singh, N.K. (eds) Fluid Mechanics and Fluid Power, Volume 3. FMFP 2022. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-6343-0_40

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  • DOI: https://doi.org/10.1007/978-981-99-6343-0_40

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  • Print ISBN: 978-981-99-6342-3

  • Online ISBN: 978-981-99-6343-0

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