THE EFFECT OF BLADE PITCH ANGLE ON THE AIRFLOW OF AXIAL FAN AT DIFFERENT OPERATIONAL CONDITIONS

Abstract

This study investigates the influence of blade pitch angle on airflow characteristics and efficiency of axial fans under various operational conditions using (CFD). By simulating airflow patterns across pitch angles ranging from 5° to 70° at different rotational speeds and load scenarios, we identify optimal configurations that enhance aerodynamic performance. The results indicate that pitch angles between 30° and 40° consistently yield the highest airflow rates. Furthermore, the effect of pitch angle diminishes as the system load increases, underscoring the importance of load-specific optimization. This work provides practical insights for fan design in HVAC and industrial applications.