Yes
Turbofans do have blades, but the design and function of their blades vary significantly depending on the application scenario. The following is an analysis of the blade characteristics of two typical turbofans:
1. Turbofan for computer cooling (centrifugal fan)
Blade structure: The gas flow direction is perpendicular to the shaft, and the impeller is composed of precision-machined blades. The air is thrown out by centrifugal force to form a high-pressure airflow.
Features: The blades are usually multiple small curved blades integrated on the impeller, which require high machining accuracy; the noise is high but the air volume is high, which is suitable for cooling in compact spaces such as graphics cards.
Technical parameter example: Size 120×120×32mm, speed 2800RPM, air volume 75CFM, counterclockwise rotation design.
2. Aviation turbofan engine
Blade structure: The first-stage blade area is significantly larger than that of the turbojet engine, and it has both propeller and compressor functions, diverting the air flow to the inner duct and the outer duct.
Material evolution: In the early days, it was a solid narrow-chord design of titanium alloy. Modern models such as the GE90 series have adopted carbon fiber composite materials to pursue lightness and high strength.
Functional differences: Together with the compressor blades (twisted shape to optimize airflow) and turbine blades (high-temperature resistant alloy + cooling technology), they constitute the core of the aeroengine, but the three have significant differences in form and material.
