Taking a self-designed single-stage adjustable rotor blade axial flow model fan as the research object

numerical and experimental studies are carried out on the effects of stagger angle of outlet guide vane on the performance of the fan under the condition that the rotor blade angle is 0°. The results show that

negative deflection of stagger angle(α=–40°) of the outlet guide vane significantly reduces the performance of the model fan and the impeller stage. Compared with the normal state of the outlet guide vane

the abnormal stagger angle of the outlet guide vane maximally reduces the total pressure coefficient of the model fan by up to 35.3% and the efficiency of model fan by up to 28.9%. At the most efficient operating point of the model fan(φ=0.19)

the abnormal stagger angle of the outlet guide vane reduces the total pressure coefficient of the model fan impeller stage by up to 27.2%

and reduces the efficiency of model fan impeller stage by up to 24.9%. The outlet guide vane's negative deflection performance is better than its positive deflection performance.