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Those interested in a very useful publication, which is moderately hard to get now, should see if their library has a copy of
"Flow of fluids through valves, fittings, and pipe"
published by the engineering department of CRANE
Technical paper number 410
It has lots of useful and understandable material on how fluid properties affect flow of liquids and gases.
Basically viscosity shows up in the numerator of equations to calculate pressure drop, therefore the pressure drop imposed by a heat exchanger or the piping leading to it will drop linearly with a decrease in viscosity.
Bill Schertz
KIS Cruiser # 4045
----- Original Message ----- From: "Bob White" <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, November 13, 2004 9:44 PM
Subject: [FlyRotary] Re: EWP Testing
On Sat, 13 Nov 2004 20:52:22 -0600
"William" <wschertz@ispwest.com> wrote:
Hi Bill,
I was just looking at the viscosity of water. It varies from 1.31 cp at
40 deg to 0.347 cp at 180 deg. What does that do to the flow rate
everything else staying the same?
Bob White
Bob,
Pressure drop through a core is usually linear with the square of the
flow rate, both for pumps and radiators.
The point marked "real rad test" has my two evap cores in parallel
being pumped by the mazda pump.
Pumps in series add pressure, pumps in parallel add flow rate.
Bill Schertz
KIS Cruiser # 4045
-- http://www.bob-white.com
N93BD - Rotary Powered BD-4 (soon)
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