Izvorni znanstveni članak

https://doi.org/10.21278/TOF.41404

An Investigation into Different Power Consumption Parameters of Rushton Turbines: A Computational Survey

Mohammad-Reza Ashory ; Department of Mechanical Engineering, Semnan University, Semnan, Iran
Farhad Talebi ; Department of Mechanical Engineering, Semnan University, Semnan, Iran
Heydar Roohi Ghadikolaei ; Department of Mechanical Engineering, Semnan University, Semnan, Iran
Morad Karimpour ; Department of Mechanical Engineering, Tehran University, Tehran, Iran

Sažetak

In the present work, the mixing process of shear thinning liquids in a six-blade Rushton turbine is studied. A finite volume based computational fluid dynamics (CFD) simulation has been carried out and the three-dimensional turbulent flow is numerically analyzed by using the Shear Stress Transport k-ω (k-ω SST) model. Shear thinning liquids were investigated and shear thinning behaviour was modelled by the Ostwald-de Waele law. The used stirred vessel has a cylindrical shape with a flat bottom and the liquid height was kept equal to the vessel diameter. Effects of the power law index and the angle of attack of the blade on power consumption have been investigated. The results show that decreasing the angle of attack from 90° to 45° not only results in an increase in the flow rate down to the bottom of the vessel, resulting in a better mixture qualification, but also reduces the power consumption of the stirring process. To verify the simulation, axial, radial and tangential velocity components were compared with other experimental data and satisfactory agreement was found.

Ključne riječi

Rushton turbines; mixing vessel; shear thinning fluid; blade angle of attack

Hrčak ID:

193654

URI

https://hrcak.srce.hr/193654

Datum izdavanja:

12.2.2018.

Posjeta: 2.077 *