VibFrank
Mechanical
- Aug 2, 2005
- 21
Hello,
I just try to understand the article "Blade Passage Tones of centrifugal pumps" of U. Bolleter in "Vibrations", Vol. 4, No. 3, 1988.
In his example of m=2 (fig. 6) he says, that the pattern rotates with p2*n/2. I see only p2*n !
In his conclusion on page 10 he writes, that for m=2, no radial forces are expected. But if I use z2=5 and z3=7, I have a net radial force running around. I don't understand it...
Can you explain this ? Do you know an other (better ?) article/book/link... to this theme ?
Thanks a lot
chris
I just try to understand the article "Blade Passage Tones of centrifugal pumps" of U. Bolleter in "Vibrations", Vol. 4, No. 3, 1988.
In his example of m=2 (fig. 6) he says, that the pattern rotates with p2*n/2. I see only p2*n !
In his conclusion on page 10 he writes, that for m=2, no radial forces are expected. But if I use z2=5 and z3=7, I have a net radial force running around. I don't understand it...
Can you explain this ? Do you know an other (better ?) article/book/link... to this theme ?
Thanks a lot
chris
