2D flow model for calculating effective area of piston-cylinder units

Authors

  • W. Sabuga Physikalisch-Technische Bundesanstalt (PTB) Braunschweig
  • A. S. Hashad National Institute for Standards (NIS) Giza
  • S. Ehlers Physikalisch-Technische Bundesanstalt (PTB) Braunschweig

DOI:

https://doi.org/10.21014/acta_imeko.v9i5.992

Abstract

A 2D flow model is described for calculation of the effective area (A) of pressure-measuring piston-cylinder units (PCU) based on their dimensional properties. With the 2D model, the uncertainty contribution associated with PCU's axial non-symmetry can be eliminated and the uncertainty of A can be reduced. The 2D model is applied to several primary PCUs operated in absolute and gauge pressure modes with different pressure-transmitting media. The benefit of the 2D model in dependence on PCU's geometrical perfectness is discussed.

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Published

2020-12-31