Computation of Vortex Flow inside of Vortex Chamber Diodes

Abstract

Vortex-throttle devices show a characteristic asymmetric throttle behavior and are proved for dampening water-mass oscillations in pipe-systems caused by transient effects. This paper shows how to compute the velocity profile of the vortex flow. New is the approach to estimate the polar moment of inertia from the kinetic energy of the vortex flow. Based on this, the differential equation describing transient flow within the system vortex-trottle-pipe is derived. The Comparison of numerous measured with computed data shows, that the developed solution describes the transient effects within the system vortex-throttle-pipe as well as for step responses as for variable energy head quite well.