The faster the flow velocity, the closer to the fan? !
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This is what the fan manufacturer told me. Suppose there is a pipe with a constant diameter; does the flow velocity increase as one gets closer to the fan? ! But the flow rate is fixed; the pipe diameter hasn’t changed, so how can the flow velocity increase?
At the inlet, the flow velocity is high, the pressure is low, and the density is low – this is the phenomenon; mass is conserved
Is this the inlet of the fan? There won’t be much difference in the pipes.
It extends from the fan inlet toward the pipe; there is a difference, and as the distance increases, this difference per unit distance decreases
So, overall, there isn’t any significant change in wind speed.
At the inlet of the fan, intense turbulence occurs due to the action of the impeller. So it feels fast!
It is conceivable that if the pipe extends infinitely, there will be little flow velocity at its end
In other words, there is no flow at the end of the pipe?! Q=A*u
According to Bernoulli’s equation, p + 1/2ρv^2 + ρgh = C. Near the fan, the pressure is low, so the fluid velocity increases.