|
Nozzle Testing
Simple
question -
How much
pressure do
you need to
drive water
through a 17
mm hole at
the rate of
16 litres
per second.
For a
perfect
nozzle, i.e.
C=1, the
answer is
2600 KPa.
But what if
the hole and
the approach
to it, is
not only not
perfect, but
perhaps has
a C value of
.53, which
is what the
textbooks
talk about
for a
"re-entrant
nozzle" |