Have edited previous post.
Finally found a calculator for Nozzles
http://www.pressure-drop.com/index.html . It has "Pressure Drop" proportional to "Flow" squared. Kryotherm also uses a quadratic relationship So PD conversion of the velocity and flow calculations for Jet Impingement and Channel cooling may have a little more meaning.
New plots for "h" v PD :
Think it only confuses further but............