The impeller of a centrifugal pump plays an important role because it determining the flow rate and efficiency pump. is determined by design design. Under filing one method for removing material from underside vane at exit. also increases head. involves having blade height that lower than nominal diameter, which can lead to reduced power consumption, improved characteristics, decreased noise vi...

The impeller of double-suction centrifugal fans may be radially offset from the centerline volute due to faults in assembly or installation. radial results more significant non-uniformity internal flow fan, which is biased designed condition, and deteriorates aerodynamic performances fan. In this paper, we performed Unsteady Reynolds-averaged Navier–Stokes (URANS) simulations on unsteady a fan ...

An AP1000 nuclear reactor coolant pump is considered to assess the influence of Impeller/Guide vane clearance on performances this type pumps. Experiments and numerical simulations relying an unidirectional fluid-solid coupling approach are used investigate problem (stress, strain mode rotor). The results reveal relationship existing between hydraulic performance ratio. effect ratio maximum equ...

Computational fluid dynamics (CFD) is a powerful numerical tool that is becoming widely used to simulate many processes in the industry. In this work study of the stirred tank with 7 types of concave blade with CFD was presented. In the modeling of the impeller rotation, sliding mesh (SM) technique was used and RNG-k-ε model was selected for turbulence. Power consumption in various speeds in th...

This paper tries to determine an optimum condition for the flotation operation of the Alborz-Sharghi coal washing plant. For this purpose, a series of comprehensive experiments have been conducted on representative samples from feed of the flotation system of the plant. Four operational variables such as the collector dosage (Fuel oil), the frother dosages (MIBC), the pulp density percent and t...

Centrifugal pumps are required to sustain a stable operation of the system they support under all operating conditions. Minor modifications of the surfaces defining the pump’s water passage can influence the tendency to unstable system operation significantly. The action of such modifications on the flow are yet not fully understood, leading to costly trial and error approaches in the solution ...

In order to study the influence of a balance hole’s diameter on cavitation performance low specific-speed centrifugal pumps, pump with specific speed 0.301 was selected as research object. The pump’s performance, distribution vapor in impeller, and axial force impeller were studied change diameters holes. results show that increase holes, number σ3% became small, pressure mechanical seal cavity...