Scott,
The model made it so easy to simulate heat transfer. The part already had alloy 6061 so that remained the same.
hcoles,
30% power in heat loss worked fairly close. I ended up using 5/6ths of that amount to get a ballpark power.
All,
The first slide shows steady state air cooled with the assumption of internal wall temperature between 1000-1200'F. Can someone verify that temperature on the internal wall? The heat transfer is 80 W/m2/'K on the fins and walls. 5000 watts is input on the cylinder wall, but only where there are fins on the outside of the wall. At this point the assumption is the other 1000 watts * 6 of heat drains from the engine and heads.
The second slide shows 60 seconds of no air flow or what would happen after 60 seconds if the fan belt broke. The internal wall temperature rises from 1000-1200'F to 1200-1400'F in 60 seconds. This is based on a non-air flowing heat transfer of 20 W/m2/'K.
These are ballpark guesses that could be improved upon with empirical data. Also, if you cannot read the temperature gauge, the bottom number is 750'F (blue) and the top number is 1500'F (red)..
