Naslov
Transient numerical analysis and experimental validation Archimedes screw hydro turbine

Autori
Dedić-Jandrek, Hrvoje ; Penga, Željko ; Nižetić, Sandro

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Skup
4th International Conference on Smart and Sustainable Technologies (SpliTech 2019)

Mjesto i datum
Split, Hrvatska; Bol, Hrvatska, 18.06.2019. - 21.06.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Archimedes screw turbine ; Renewable energy ; Computational Fluid Dynamics ; Volume of Fluid ; Sliding mesh ; Efficiency

Sažetak
Abstract — Archimedes screw turbine (AST) power output and efficiency are investigated in this work via an interactive combination of experimental testing and numerical analysis. The experimental approach considers different configurations of the AT inclination angle (21°, 25° and 30°) coupled with different angular velocities (from 60 to 120 RPM) and water flow rates (10 l l/ss-1 and 12.81 l/s s- 1), while the numerical model considers single flow rate with other variable parameters. The numerical analysis is conducted using Computational Fluid Dynamics (CFD) modelingmodelling. The transient three- dimensional multiphase model incorporating Volume of Fluid (VoF) method was developed for the simulation of the two distinct phases, air and water and their interface, i.e. free surface of water. The sliding mesh methodology was employed to simulate the rotational movement of the AT to ensure the most accurate and realistic simulation environment as possible, when compared to the experimental readings. Transient numerical results are compared with experimental data with reasonable agreement and outlined the influence of inclination angle and rotational speed of the Archimedes screw on the net performance of the hydro turbine. The numerical results also gave insights for in further possibility focused on optimization of the hydro turbine design parameters as well as operating conditions and indicate that the future numerical model must also include the accumulation tanks because they have significant effect on the net results.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA