https://protectionforhead.com/story.php?title=axial-cooling-fans-6 13. Designing for Performance: The Impact of Blade Number and Pitch Angle Axial fan performance—measured by flow rate, static pressure, power consumption, and noise—is highly sensitive to the design parameters of the impeller, primarily the number of blades and the blade pitch angle[4]. Fri, 30 Jan 2026 15:39:10 UTC en