|
Session:
|
The Wonderful World of AJP
|
|
Paper Type:
|
Invited
|
|
Title:
|
The Puzzle of the Steady-state Rotation of a Reverse Sprinkler
|
|
Meeting:
|
2016 Winter Meeting: New Orleans, Louisiana |
|
Location:
|
N/A |
|
Date:
|
|
|
Time:
|
10:00AM
|
|
Author:
|
Wolfgang Rueckner, Harvard University
617-495-5360, rueckner@fas.harvard.edu
|
|
Co-Author(s):
|
None
|
|
Abstract:
|
The continuous rotation of the reverse sprinkler has been a puzzle for over two decades. We present a series of experiments that demonstrate that a properly designed reverse sprinkler experiences no steady-state torque and does not rotate. If any sustained rotation of the reverse sprinkler occurs, it is because a force couple produces a torque accompanied by vortex flow inside the body of the sprinkler. No steady-state rotation occurs if the vortex is suppressed or prevented from forming in the first place.
|
|
Footnotes:
|
None
|
|
Presentation:
|
reverse sprinkler.pdf
|
