12

I'm trying to put together the Kuchemann & Weber and the Kays & London theories together. I'm going to 3D print the diffuser as molds then fiberglass over top.

My oil cooler is 9.31" x 11.25" by 2", so I want to maximize the diffusers. Using Kays & London, I'll stick with 20% opening, which makes my S wedge 9.31"W x 2.25"H (20.95sq").

Reading over and over the "How to cool your wankel"..
What do I use for Kuchemann and Weber? Fig 12-16 on Page 49, shows the Scoop-Area (Ai) vs Rad-Area (Ab) should be around 40% to start seeing gains. Is my Rad-Area (Ab), the opening of the K&L wedge? If so, that would make 40% of 20.95sq" = 8.38". Around 3.25" circle. Seems big, since the wedge opening is only 2.25"H.

I have lots of room for duct behind the rad, probably get in the 50% ratio of wall-distance (a) to radiator-height (Hb)


- Matt Boiteau

That may or may not work Matt.  I  never tested that. I was guessing.
You may get flow separation around the transition from one system to the other.

I would test it on the top of a vehicle on the highway with a water manometer.

The idea of course  is to get uniform flow through the core. The cooper tubes are pitot tubes.

Paul Lamar

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