A vortex flow control device

摘要

A vortex flow control device is manufactured by forming a template unit 2 having end walls 4, 6, of which the wall 4 has an outlet opening 5, and a partial outer wall 8. The partial outer wall 8 has an opening 16. A plate 26 is subsequently secured to the template unit 2 to partially close the opening 16, to leave an inlet 30 ( Figure 2 ). The size of the plate 26 is selected so as to result in an inlet 30 sized to achieve required flow characteristics for the finished device. The plate 26 is inclined to a planar portion 14 on the opposite side of the inlet 30 at an angle in the range 85° to 95°, so as to induce turbulence in the region of the inlet 30.