Investigation of the effects of valve closing in a static expansion system

TL;DR

This paper investigates how valve closing affects pressure measurements in a static expansion system, combining modeling and experiments to improve accuracy in pressure readings.

Contribution

It introduces a model and experimental method to analyze pressure drops during valve closing, enhancing understanding of pressure dynamics in static expansion systems.

Findings

Pressure drops depend on valve closing parameters

Model predictions align with experimental data

Insights for reducing measurement uncertainties

Abstract

The precise measurement of the pressure of the gas enclosed in the starting volume of a static expansion system is important for achieving low measurement uncertainties. This work focuses on the valve closing process and the resulting pressure difference. The flow conservation law is used to set up a model and an experimental procedure has been developed to investigate the pressure drop across the moving valve plate. Various parameters are evaluated and compared with experimental data.