Rahul,

I am afraid I have to let you down here. I have never seen the interior
layout of the piston cooling passages.

The only few things I can tell you for fact at this time is that Stroke
is approximately bore * 2 the (B&W K98 are 2.0m)

The K98 engine is published to run at 100rev/min and ~6000kw per cylinder.

If you can get to an engineering library, look up the
Diesel and Gas Turbine Catalog.
It should give you contacts and Sulzer and B&W (what ever they are
called today). You can probably get some information there.
As a student marine engineer, I was give a very nice tour of the
facility in Kobenhavn.

Best of luck
Matt Colie


Matt colie - Your information is really valuable and i got more info
by searching for sulzer pistons.. You have really helped me a lot for
my project.. As I am doing a heat transfer analysis on pistons, i
needed these information about the piston stroke, bore and the cooling
channel dimensions..

What can be the approximate values for the following?

Bore - 60cm??
Stroke - 90cm??
Engine rpm - 100
cooling channel dia - 1cm??
Inlet velocity of water or oil - 1m/s??
Piston crown temperature - 500 K??

As of now, I have modeled a 3d cooling channel which has an
inlet(vertical) at one extreme extending onto the piston crown, taking
a semicircular path around the underneath of the crown(horizontal) and
an outlet(parallel to the inlet) at the other extreme.. Is this
atleast remotely realistic??