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Pipes & Tobacco
General Pipe Discussion
"...they have a soul and smoke impossibly well..."
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<blockquote data-quote="wintermute" data-source="post: 234355" data-attributes="member: 685"><p>Time to geek this up a notch. You can have head loss (think of it as loss of pressure - causing you to pull harder for an equivalent air flow) due to bends, kinks, rough surfaces in the air hole, diameter of air hole, the way the air hole opens up at the bit (fast or slow transition), etc. Speed through the chamber and air hole will effect the amount of turbulence and mixing of smoke and air.</p><p></p><p>So Mr. Pease is abolutely correct - you don't want a wide open bore with theoretically zero head loss. There's a sweet spot somewhere in all the speed, flowrate, pressure turbulence, friction factors that's going to give you an optimal mixture so that you get the right amount of smoke (turbulence and mixing - also providing the necessary amount of air for proper combustion), pressure (sudden drops will cause condensation), etc.</p></blockquote><p></p>
[QUOTE="wintermute, post: 234355, member: 685"] Time to geek this up a notch. You can have head loss (think of it as loss of pressure - causing you to pull harder for an equivalent air flow) due to bends, kinks, rough surfaces in the air hole, diameter of air hole, the way the air hole opens up at the bit (fast or slow transition), etc. Speed through the chamber and air hole will effect the amount of turbulence and mixing of smoke and air. So Mr. Pease is abolutely correct - you don't want a wide open bore with theoretically zero head loss. There's a sweet spot somewhere in all the speed, flowrate, pressure turbulence, friction factors that's going to give you an optimal mixture so that you get the right amount of smoke (turbulence and mixing - also providing the necessary amount of air for proper combustion), pressure (sudden drops will cause condensation), etc. [/QUOTE]
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Pipes & Tobacco
General Pipe Discussion
"...they have a soul and smoke impossibly well..."
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