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Hi!
I was wondering if someone can point me in the right direction.
Suppose you have a cylinder with a center drilled hole, at the end of the hole a perpendicular hole is drilled through the cylinder wall as shown below:
How can i calculate the pressure drop if the fluid flows from left to right.
The fluid is turbulent
Regards
Sigurd
@snã¦ss wrote:
Hi!
I was wondering if someone can point me in the right direction.
Suppose you have a cylinder with a center drilled hole, at the end of the hole a perpendicular hole is drilled through the cylinder wall as shown below:How can i calculate the pressure drop if the fluid flows from left to right.
The fluid is turbulent
Regards
Sigurd
People have been trying to solve this (with accuracy) for a long time. A good finite element model, properly set up, will come close. There are numerous handbooks (Crane Company used to put out a really good one) that can assist an empirical estimate.
There are a lot of variables: hole diameter, lengths, effective radius of the turn, Reynolds Number, etc. The sharp turn at the end is the major problem.
Hi
https://www.youtube.com/watch?v=26TG3SxsHwM
http://www.metropumps.com/ResourcesFrictionLossData.pdf
The first is theory behind pipe loss coefficient.
Second is experimental values of coefficient including mitred bends
Cheers
Terry
In order of preference:
a.) experiments
b.) CFD
c.) Equations.
d.) Tabulated loss parameters (k-factors or minor losses)
C & D are easiest.
For C here's one example that I'll assume has something close to your problem. (Idel'chik)
https://www.nrc.gov/docs/ML1220/ML12209A041.pdf
Crane Technical Paper 410 is good, as Fred points out - but not free. Any fluids book should have some minor loss factors to get you going.
A careful web search can reveal a pdf of Crane TP 410