INVESTIGATION OF THE EFFECTIVENESS OF A WINDMILL FOP IMPROVING FLOW UNIFORMITY IN A DUCT

摘要

Tests have been made to determine the effectiveness of a freely rotating windmill in smoothing out non-uniform duct flow. The action of the wind¬mill is to transfer total head from high-speed regions to low-speed regions. The design of a windmill and the forces on a windmill due to changes in wind speed are discussed. The experimental results show the effect of blade angle and number of blades on the windmill's effectiveness in smooth¬ing out, a wide variety of disturbance profiles, both circumferential and radial.