Rebreather World - View Single Post - Fundamentals Of Constant Mass Flow (CMF) Systems

jorgey · 6th October 2007, 08:21

Quote: (Originally Posted by DanDunfee)

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Do I understand correctly that the data you wanted to see illustrated graphically is how fast the mass flow falls off (rolls off) after the orifice critical pressure ratio falls below 2X and the mass flow rate becomes progressively lower. ??...

hi Dan,

thank you for your answer.- i have seen such information somewhere already.- what i wanted to know, was, what for a IP has uncompensated 1st. stage in a CMF Rebreather, that goes f.ex. 75m like the kiss.- i mean, have they a IP near to 20bar (290psi, if i convert right) or they accept the flow decay and the diver needs to feed more often?

thanks

j o r g e

6th October 2007, 08:21	#7 (permalink)
jorgey New Member Current Rebreather/s: Azimuth Home Build Other Rebreather/s: Azimuth Home Build Join Date: May 2007 Location: Austria / Argentina Posts: 54	Re: Fundamentals Of Constant Mass Flow (CMF) Systems Quote: (Originally Posted by DanDunfee) ============================ ... Do I understand correctly that the data you wanted to see illustrated graphically is how fast the mass flow falls off (rolls off) after the orifice critical pressure ratio falls below 2X and the mass flow rate becomes progressively lower. ??... hi Dan, thank you for your answer.- i have seen such information somewhere already.- what i wanted to know, was, what for a IP has uncompensated 1st. stage in a CMF Rebreather, that goes f.ex. 75m like the kiss.- i mean, have they a IP near to 20bar (290psi, if i convert right) or they accept the flow decay and the diver needs to feed more often? thanks j o r g e
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