I have a question...

[Hark]

Hello:

I would like to know at what height water enters the pipes of a boat, keeping in mind the knots.

In other words, I would like to know if a boat goes at 10 knots then how height can the water enter the pipes?

Thanks a lot in advance.

[DrCraze]

About waist deep I would say. 10 knots wouldn't be bad but at around 30 knots If you are not careful water can enter at a painful rate.

Originally Posted by Hark

Hello:

I would like to know at what height water enters the pipes of a boat, keeping in mind the knots.

Which boat?

[Hark]

A cargo ship or a big ship, actually any...

Please I need to know more details

Thank you guys!

There are no details to provide.

Of course every boat shape has a different behaviour in similar seastate, so making general statements is not possible.

[yipster]

10 knts.. hmm where how deep and high the pipes, what hull, what sea state
variables with depth, temperature and dynamic pressures in stripes and what else
think Michlet calculates some bottom pressure but dont think for slamming ships
treads on newton's pressure under the search button and on the net


waiting for a better reply from a NA i came acros this funny piped Pythagorean cup

[baeckmo]

Hmmm, what pipes? The dynamic pressure at 10 knots, ie 5.1444 m/s is 13497.3 Pa, for a water density of 1020 kg/m3. This equals a vertical head of 1.349 m of water column.

The formula for head (in meters) is Head=Velocity^2/(2*g), where velocity in m/s, and g is 9.81 m/s^2. Using head in meters instead of pressure in Pascales, has the bonus of beeing independent of fluid density.

[Hark]

Thank you for your respond! It will take me a while to answer, but I will!

[daiquiri]

At least you others seem to have understood the question...
How deep under the surface? The "height" should be measured from the design waterline or from the keel? The "pipe" is aligned or perpendicular to the flow? If it is perpendicular, for example, than baeckmo's estimate of the dynamic pressure is an overshoot... If it is aligned, than a hydrostatic component should be added to the dynamic pressure, if the height is to be measured from the keel.
Etc, etc... :\

[Hark]

Thank you all for the information!

The mathematical formula answered my questions.

There is a possibility that I might make another thread related to this formula.

Once again, thank you for all your help!