Trans RINA, Vol 153, Part A1, Intl J Maritime Eng, 2011 Jan-Mar
issue. Regarding the comment on wave excitation by Dr Kong, the authors believe that this was very minimal during the tests. However, drifting motion, mainly swaying, was observed.
Mr Scott asked about possible future tests.
Unfortunately, this kind of full-scale flooding tests are very
laborious and expensive. Thus at the time of
writing, no further tests with more complex flooding scenarios are being planned. But we do hope that in long- term this could be possible. In the meantime, efforts can be put to further improvements of the numerical tools. The way to go is to build enhanced numerical tools on a solid, well validated, basis and not to try to solve all problems in damage stability at once.
Free discharge to air
0.30 0.40 0.50 0.60 0.70 0.80
diameter valve
0.30 0.40 0.50 0.60 0.70 0.80
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 pressure height [m]
0.0 0.5 1.0 1.5 relative pressure height h/hopening
Figure 20: Discharge coefficients for the valve: free discharge to air (left) and partly and fully submerged flow (middle) with two photos from the flume tests (right), courtesy of Mikael Stening, Aalto University
2.0
Partly and fully submerged flow
A-68
©2011: The Royal Institution of Naval Architects
discharge coefficient
discharge coefficient
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