Hydraulic diameter of finned tube
Hydraulic diameter of finned tube
(OP)
Hi I read post thread391-248736: Hydraulic diameter of finned tube and was interested by the post from 25362
would anyone happen to have a diagram showing this more clearly? I was unsure as to what p would be as a distance, is this circumferential? and if so at which point of the fin?
Thanks
Quote (25632)
Hydraulic equivalent diameter of finned tubes (dHe)
df = external diameter of fin
do = external diameter of bare pipe
p = face-to-face distance between adjacent fins
t = fin thickness
dHe = [(df2- do2)/2p + dft/p + do(1 - t/p)] ÷ [1 + (df - do)/p]
would anyone happen to have a diagram showing this more clearly? I was unsure as to what p would be as a distance, is this circumferential? and if so at which point of the fin?
Thanks





RE: Hydraulic diameter of finned tube
The simplest way to think of it is that P is the distance between each disk, along the length of the tube.
RE: Hydraulic diameter of finned tube
saludos.
a.
RE: Hydraulic diameter of finned tube
One is called a streamlined pitch and the other is a transverse pitch.
I believe your equation is calculating the distance between 2 tubes in the transverse direction which is perpendicular to your stream-flow's path (on the shell-side).
Is your fin-tube's pattern in a parallel or stagger configuration?
Hope this helps.
Jack
www.ThermalTransferTechnology.com
RE: Hydraulic diameter of finned tube
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