X-Mozilla-Keys:                                                                                 
Fredmoreno@aol.com wrote:

Paul:

Get that blower a lot farther away from the inlet to the diffuser, or
reconfigure to use the blower in a suction mode.  The velocity distribution
coming out of the blower is highly skewed (which way depends on the blower
design and its operating point) and will confuse your results.  I would
strongly recommend putting the blower in a box and then mounting the radiator
on the box and sucking through the radiator.  Then put the diffuser on the
radiator, and put a bell mouth inlet on the diffuser to get a smooth inlet
flow without a lot of inlet losses and turbulence.  This way you will get a
more uniform velocity inlet distribution that better represents the stream
expected in flight.

Fred

I hear you Fred. I had contracted for this configuration before
you mentioned that a few days ago. Hopefully someone out there
will pick up the ball and instrument their airplane with angled rads 
so we have some much higher pressure real world data.
I suspect things might change a bit when we have more than 1/2 inch of
water to work with. It is possible once the flow gets much higher
the flow distribution through the rad may get much better despite
a simple wedge shaped duct. Drag (rad resistance) being proportional 
to velocity squared and all. I have a limited amount of time to do
this sort of thing. I need to be working on both my airplanes.

Paul Lamar

 
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