Impeller Tip Pressure
Impeller Tip Pressure
(OP)
I wonder if anyone can help or point me in the right direction
I am looking for a paper “Effect of axial clearances between impeller discs and casing on axial forces in a single centrifugal blower” Thermal Engg. 12, 9 pp104-9 (September, 1965) by A.N. Shershneva
Or any newer papers that could help covering the same subject.
What I am looking for is a method to evaluate the pressure, on what is essentially a closed radial flow impeller, at the impeller tip at the front and back shrouds.
I am looking for a paper “Effect of axial clearances between impeller discs and casing on axial forces in a single centrifugal blower” Thermal Engg. 12, 9 pp104-9 (September, 1965) by A.N. Shershneva
Or any newer papers that could help covering the same subject.
What I am looking for is a method to evaluate the pressure, on what is essentially a closed radial flow impeller, at the impeller tip at the front and back shrouds.





RE: Impeller Tip Pressure
RE: Impeller Tip Pressure
I have a lot of test data on axial thrust I am trying to get back to a method that can be used to make a fairly accurate assessment of thrust considering the effects on vortex strength including surface roughness, shroud radius of curvature, leakage losses through the wear rings, recircualtion etc.
I have a current method which when review in some cases can over estimate the axial thrust seen on test by a significant amount.
The part of this complex jigsaw I am currently missing is the effects on tip pressure at the front and back shrouds as a result of axial gap, I have a method from test data of effect on tip pressure based on specific speed and leakage but with no reference to the axial gap, these will be a driving force of the vortex at the front and back shrouds.
I have a BHRA paper that references a graph extracted from the Shershneva paper that shows this and I would like to review the paper to see if this is applicable to what I am doing. i.e. is there a method presented?
CFD would be great but when I have a large amount of test data to review and also I am also looking at this to consider a range of new equipment with limited time scales CFD is not an option at the moment, however I fo intend on verifying the method and mathematical model with CFD on a few examples and possibly add some "experience" factors in for correction.
Any help would be appreciated
David
RE: Impeller Tip Pressure