An example of pressure and velocity wave propagation in a model of a ventilation drift

Author: J. Krawczyk

The paper the subject of which is concerned with an aspect of gas-flow dynamics in connection with mine ventilation systems, presents a comparison of measured and calculated transient flow effects induced by a sudden closure of the inlet of a straight pipeline.

With the use of laboratory simulation a numerical model of flow phenomena was constructed.

This model was applied with the use of the author's computer program, based on the reduction of compressible fluid flow to one dimension.

The results of measurements and the simulation are presented in graphical form.

The recorded and calculated propagation of pressure and velocity waves were compared.

Similarities and differences are emphasised and the paper attempts to explain the effects.