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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
ABS carbon barrel heat dissipation......
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<blockquote data-quote="royinidaho" data-source="post: 115506" data-attributes="member: 2011"><p>gg,</p><p></p><p>I'm looking forward to those images. ID Preacher's camera is a real boon to the project.</p><p></p><p>I also appreicate the 'round table' discussion that is going on here.</p><p></p><p>My feable attempts at documenting barrel temp across the length of the barrel have been more than a little confusing. For an all metal barrel heat seems to flow out from the bore and along the barrel from hotter to colder areas.</p><p></p><p>I'll have my test barrel back maybe today and will continue the attempts to measure temperature and heat flow patterns.</p><p></p><p>My Nukalure training left me with two heat xfer eqn's:</p><p></p><p>Q = MCdeltaT Q=Heat transfer. M = mass flow rate and delta C = constant for the type of material T = temperature difference.</p><p></p><p>This eq'n doesn't apply to our subject.</p><p></p><p>Q = uAdeltaT, the other eq'n, seems to be more appropriate for the subject.</p><p></p><p>Q = heat transfer</p><p>u = a constant for the type of material</p><p>delta T = temperature difference</p><p></p><p>However this eq'n is usually applied where there is a constant temperature along the pipe, so to speak.</p><p></p><p>It seems to be generally understood that the hottest barrel temperature would be at the throat and the lowest somewhere towards the muzzle.</p><p></p><p>My attempts at altering this heat pattern is to concentrate the higher temperature more towards the case head than the throat.</p><p></p><p>However, if the carbon fiber not only enhances heat flow away from the bore but also along the barrel at a rapid rate it wouldn't be long until every high intensity cartridge would have a properly carbon wrapped barrel. And all of this because gg is pushing the envelope a bit. Good goin!</p><p></p><p>So much for that. I'm off to Rexburg to see if that idiot has the RUM barrel fitted yet. The first estimated delivery date back in January /ubbthreads/images/graemlins/frown.gif</p></blockquote><p></p>
[QUOTE="royinidaho, post: 115506, member: 2011"] gg, I'm looking forward to those images. ID Preacher's camera is a real boon to the project. I also appreicate the 'round table' discussion that is going on here. My feable attempts at documenting barrel temp across the length of the barrel have been more than a little confusing. For an all metal barrel heat seems to flow out from the bore and along the barrel from hotter to colder areas. I'll have my test barrel back maybe today and will continue the attempts to measure temperature and heat flow patterns. My Nukalure training left me with two heat xfer eqn's: Q = MCdeltaT Q=Heat transfer. M = mass flow rate and delta C = constant for the type of material T = temperature difference. This eq'n doesn't apply to our subject. Q = uAdeltaT, the other eq'n, seems to be more appropriate for the subject. Q = heat transfer u = a constant for the type of material delta T = temperature difference However this eq'n is usually applied where there is a constant temperature along the pipe, so to speak. It seems to be generally understood that the hottest barrel temperature would be at the throat and the lowest somewhere towards the muzzle. My attempts at altering this heat pattern is to concentrate the higher temperature more towards the case head than the throat. However, if the carbon fiber not only enhances heat flow away from the bore but also along the barrel at a rapid rate it wouldn't be long until every high intensity cartridge would have a properly carbon wrapped barrel. And all of this because gg is pushing the envelope a bit. Good goin! So much for that. I'm off to Rexburg to see if that idiot has the RUM barrel fitted yet. The first estimated delivery date back in January [img]/ubbthreads/images/graemlins/frown.gif[/img] [/QUOTE]
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ABS carbon barrel heat dissipation......
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