Moderator: Mike Everman
hagent wrote:Can UFlow be used to model your Fo Mi Chin? Also I'm getting close to finishing my annular? PJ The intake surrounds the exhaust, and I was wondering if UFLow can be used in this type of design because one end is totaly blocked off with two ends open on the same side.
hagent wrote:Thanks Larry,
So the CC end would just be left open? I guess there is no other choice.
Larry Cottrill wrote:You make the CC outer end a tiny hole (like 1 mm diam) with a very flat cone forming the front end of the chamber. When you run UFLOW1D, there will be a little anomaly in the curves there (at the left end where the tiny hole is) which you can ignore. I refer to this as the 'spark plug leakage' ;-) The very flat cone will essentially reflect just like a flat end plate. Of course, I always prefer a slightly domed end anyway, so I simulate that with an appropriately sized cone and tiny hole.
If you just left the front end open, you would be analyzing a half-wave pipe, not a quarter-wave one, which would give you completely incorrect results.
Bruno Ogorelec wrote:Larry, why can't you turn around the process next and pretend that the tailpipe was of minuscule size and analyze the events in the intake, in the same way you did with the tailpipe in the first step.
Maybe you would arrive at two sets of results that might usefully fit together.
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