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구재인(Jae-In Koo),김창수(Chang-Soo Kim),정진택(Jin-Teak Chung),김광호(Kwang-Ho Kim) 한국유체기계학회 2001 유체기계 연구개발 발표회 논문집 Vol.- No.-
In the present study, we studied the method of predicting the on-design and off-design point performance of axial flow fan with adjustable pitch blades. With the change of stagger angle of axial flow fan with adjustable pitch blade, flow rate and pressure can be changed. Because of this merit, adjustable pitch fans are used in many industrial facility. When changing stagger angle or estimating the performance at a wide range of off-design condition, incidence angle changes greatly as the flow rate changes. Therefore, the deviation angle at the blade exit is estimated by the correlation considering the effects of blade design, incidence angle variation. In the loss model, we used known pressure loss model for blade boundary layer and wake, secondary flow, endwall boundary layer and tip leakage flow. The results of modified deviation angle model and experiment were compared for the usefulness of the modified model.