Methods for manufacturing a vortex flow control device by manufacturing a template then attaching an outer wall

摘要

598739 Disclosed is a method of manufacturing a vortex flow control device. The 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 preferably inclined to a planar portion (14) on the opposite side of the inlet (30) at an angle in the range 85 degrees to 95 degrees, so as to induce turbulence in the region of the inlet (30).