[fhabbio]

Hello everybody,

I don't know if this forum section is correct, thus forgive me.
I have a big doubt (maybe too stupid for most people) about a simulation; the aim of the simulation is to verify the influence of the swirling flow in a conical diffuser.
As result I obtain actual static pressure recovery a little bit greater than ideal static pressure recovery that is to say diffuser effectiveness exceeds 1!
I'm not sure of this value, but have read applied fluid dynamics handbook which explains that it is possible for effectiveness exceeds 1 if the inlet stream is highly peaked and the exit stream is nearly uniform.
Therefore, this is my question.
Can the swirl improve the diffuser's performance so much?