Vorrichtung und Verfahren zur Veränderung des Durchflußwiderstandes einer Drosselvorrichtung für fluide Strömungen

摘要

An apparatus and method for variably controlling fluid flow in a closed flow line, especially the flow of a pulp suspension through a headbox of a paper-making machine, includes guiding fluid through a cavity of a conduit having at least two different cross-sectional profiles. Fluid flow resistance is adjusted by changing the contour of an edge defined by the conduit and a transition step connecting the two cross-sections.