Numerical studies on a vertical tubular wind collector with backward-facing step outlet

This paper carried out a new concept design of wind collection, a vertical tubular wind collector. Using two key-point design: backed-forcing step and cylindering flow design the structure of main body. The finite volume method is applied to solve the Navier-Stokes equations, and the steady-state flow field analysis is simulated with the realizable k-ε turbulence model. The height of the exit groove is changed (0D ~ 4D), and the effects of different inlet wind speed (5m/s ~ 12.5m / s) on the inlet were discussed. The result shows that increasing the groove cutting height increases the local low pressure zone at the outlet, and the low pressure vortex increases. The suction effect is the best while the cylindrical rear produces a stable symmetrical vortex system.