1 reply to this topic

[jatinder]

I want to remove this post.

Edited by jatinder, 17 June 2013 - 09:30 AM.

[katmar]

In your Word document, for a gradual contraction the way you have defined ξ is exactly the same as the way Crane have defined K in equation 2-15.   You then calculated K as K = ξ - β⁴ + 1 and  K = ξ + 1/ β⁴ - 1.   Is this intended to be a correction factor for laminar flow?  You have not detailed what your Reference 25 is.

 

Note that although the Crane 410 document states in a few places that the K values are valid for laminar as well as turbulent flow, the K values are in fact valid for fully developed turbulent flow only.  You are correct to therefore apply a correction factor if you are working with laminar flow, but you have not explained where the correction factor comes from.