Planar diffuser design help

[moon161]

I have a slender duct w/ an inlet, a dead end, and a condenser on one face that I need the air to go through somewhat uniformly, with, of course, minimum backpressure, or head loss turning the corner.

Thinking about it as a diffusion process, as opposed to forcing air around a corner.
I've had success using a honeycomb grid placed diagonally across the flow, but it may cost me too much flow.

I thought about dividing the duct into 3 parts, each expanding 3:1 from the entry to the exit, image attached. Could anyone give some design guidance? Material at hand is sheet metal. Arrows indicate approximate or desired velocity.

 

[MikeHalloran]

You're probably better off with a diagonal array of quarter-circle turning vanes, to get the flow going in a direction normal to the condenser face.

As proposed, you're still basically blowing the air across the condenser face.



Mike Halloran
Pembroke Pines, FL, USA