Effect of duct geometry on Wells turbine performance

High performance ocean energy harvesting turbine design–A new casing treatment scheme

“…The torque coefficient (T*), stagnation pressure drop coefficient (DP*) and efficiency (h) were plotted for a wide range of FCs. It shows some discrepancy with the result of Shaaban and Hafiz [2] and the authors [2] were unable to capture the flow parameter at the separated flow condition. Further analysis in the present article is reported for different TCs and GDs.…”

“…Efforts have been made to increase the performance of the Wells turbine by changing duct geometry [2], designing monoplane and biplane Wells turbine [3], optimizing blade profile and thickness [4], modifying airfoil profile [5e7], making non-symmetric airfoil blade shape [8] and non-uniform tip gap [9], inserting end plate [10], sweeping [11,12], changing blade pitch angle [13,14], etc. Other efforts involve modification of guide vane angle [15e17], bidirectional flow [18], variable chord [19], bi-plane unidirectional blade [20], counter rotating blade [21,22], hysteretic behavior with unsteady flow [23], etc.…”

Effect of Blade Profiles on the performance of Bidirectional Wave Energy Turbine

“…The CFD validation of the numerical results is presented in Fig 6. The performance characteristics of the Wells turbine for the entire flow range is plotted and verified. From the figure, it is evident the present numerical results follow the same trend as the existing CFD results except for the work of Shaaban and Abdel Hafiz [18]. In their work, they reported that the steady RANS model failed to predict the stall phenomenon of the Wells turbine.…”

“…To ensure the numerical accuracy of the simulations performed the present numerical results are validated with the experimental results of Curran and Gato [16] and the numerical results of [13,17,18,19]. The CFD validation of the numerical results is presented in Fig 6. The performance characteristics of the Wells turbine for the entire flow range is plotted and verified.…”

Numerical investigation of the power generation of a ducted composite material marine current turbine

“…The governing equations were solved in the absolute frame and discretized by the finite volume technique provided by the ANSYS FLUENT software. The standard pressure correction technique semi-implicit method for pressure-linked equations (SIMPLE scheme) was used for solution, and the second order upwind scheme was utilized in FLUENT (Shaaban and Abdel Hafiz, 2012). For setting the boundary conditions, the computational domain inlet was applied at uniform velocity, while at the outlet a constant pressure condition was utilized.…”