Jed,
Shades of the old S.Morgan Smith Company of York, Pa. The technology came
from the Czechs, passed to Peltin Water Wheel Company. Smith had the
technology and passed it on the Allis-Chalmers, The Japanese built upon it.
Amini doesn't give the details but I can almost guess what happened and why.
Brings back days of yesteryear.
Richard
----- Original Message -----
From: "Jed Rothwell" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, October 10, 2005 10:38 AM
Subject: Cavitation paper from Farzan Amini
Getting back to the original ORIGINAL purpose of this discussion group . .
. An engineer named Farzan Amini ([EMAIL PROTECTED]) sent me a short paper
on cavitation effects at a hydroelectric dam where he works, in Iraq. The
English in this paper needs some editing, and I think the paper needs
another page or so of text to explain what the author has in mind, but it
looks promising. I may upload it after some more work has been done on it,
but for now, anyone interested in this subject should contact me for a
copy.
Attached is the title and abstract.
- Jed
- - - - - - - - - - - - - - - -
Production Method for Violent TCB Jet Plasma from Cavity
Farzan Amini
Nuclear Engineer(MSc.) .Mechanical Engineer(BSc.)
[EMAIL PROTECTED]
1. Introduction
One of the hydropower plants in our country has 4 Francis turbines so that
two units on the right way(looking downstream) share a common penstock and
a common long tailrace tunnel and other two units on the left also share
a penstock and tailrace tunnel. Upon commissioning of one unit, the
hydraulic transient in the draft tube during load rejection above 75% was
excessive. It was apparent that the guide vane closing law that had been
adopted would result in water column separation during load rejection at
full power. Tests with a slower closing rate showed that the risk of
column separation was reduced, but a violent surge developed in the draft
tube close to maximum over speed. The measurement equipment in this
experiment have a sampling time of 0.01 sec.
The energy level and cavity volume that are produced are much more than
those of
regular TCB(Transients Cavitation Bubbles) experiments, and
therefore, we should expect more effects than the TCB jet.
