Pumps

Numerical modeling of twin-screw pumps using CFD

Increasing demands for high-performance screw pumps in oil and gas as well as other applications require deep understanding of the fluid flow inside the machine. Important effects on the performance such as dynamic losses, influence of the leakage gaps, presence and extent of cavitation are difficult to observe by experiments. However, it is possible to study such effects using well validated computational fluid dynamics (CFD) models.

Accelerating pump design exploration

Accelerating pump design exploration for better performance, faster

Some research estimates that pumping systems account for nearly 20% of the world's electrical energy demand, and range from 20% to 25% of the energy usage in certain industrial plant operations.

Transient analysis of the Francis-99 hydroturbine

Simulation of the Francis-99 hydroturbine is presented with correlation to experimental data. The virtual model of the hydroturbine accurately models the unsteady nature of the flow-field at the best operating point (BEP), part load (PL) and high load (HL) conditions. Global predictions such as efficiency, net head and discharge correlate well with experiment. Additionally, local velocity profiles in the runner agree well with experimental PIV measurements. Vortex rope characteristics are discussed for each of the operating points.

Pages