Effects of Turbulence Models on Flow Characteristics of a Vertical Fire Pump

The flow in the vertical long-axis fire pump exhibits complex, three-dimensional, unsteady features. In an attempt to understand effects of turbulence models on mechanism and performance characteristics pump, ANSYS CFX software was used carry out numerical studies using URANS. main objective this study investigate dynamics within influence applying different computational models. then sought conduct a brief analysis pressure pulsation pump. reliability CFD model validated with external characteristic test. transient distribution, velocity field were analyzed. results compared experimental results, where it revealed that SST k-ω showed 1.82% 0.81% improvements efficiency head, respectively, over k-ε terms power performance, however, standard is less likely over-predict by overload conditions as other charts did not show significant reactions varying across all studied rates. However, streamlines there several disruptions streamwise flow, both RNG exhibited more recirculation areas than Overall, for type application, best-performing model, while poorest performance. Nonetheless, also has its strengths. This investigation would serve theoretical reference further research development fluid machinery.