Error in Sudden and Gradual Contraction K Factor?
Posted: Thu Jun 12, 2014 7:51 pm
I was looking at both the calculator and theory for calculating the K factor through elargements and contractions and think you might have an error.
It looks like you are referencing Crane, but I think you added a squared term.
For sudden contraction you have:
K1 = 0.5 * (1 - beta^2) ^2
The Crane reference has it as:
K1 = 0.5 * (1 - beta^2)
The squared term is only in the sudden enlargement term (which you have):
K1 = (1 - beta^2) ^2
Just something I found.
It looks like you are referencing Crane, but I think you added a squared term.
For sudden contraction you have:
K1 = 0.5 * (1 - beta^2) ^2
The Crane reference has it as:
K1 = 0.5 * (1 - beta^2)
The squared term is only in the sudden enlargement term (which you have):
K1 = (1 - beta^2) ^2
Just something I found.