what are advantage/ disadvantage of many fan blades vs 3 or 4 blades…? and why does my desk fans usually have 3 blades as oppose to many small blades like a turbo fan engine fan disk?
In: Engineering
More blades have more surface area if they’re the same size, and unless there’s some weird air current physics I don’t know about, they would therefore have more air resistance and drag. Because of the higher resistance, it takes more power to spin at the same rate, but a greater surface area would also be able to push more air.
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