If you solve for T, you have the following:The state of an amount of gas is determined by its pressure, volume, and temperature. The modern form of the equation is:
pV = nRT
where p is the absolute pressure of the gas; V is the volume of the gas; n is the amount of substance of the gas, usually measured in moles; R is the gas constant (which is 8.314472 JK−1mol−1 in SI units); and T is the absolute temperature.
LOLRocklockI said:Subdjoe , It is late , and I've indulged in a couple of adult bevs . Am I to believe that there is a 'beard' out there somewhere ? you MUST be delutional !
The chrub I see is looking straight toward the cammera with his head tilled slightly his right ,our left . how can he grow a breard right our of the side of his head ?subdjoe said:LOLRocklockI said:Subdjoe , It is late , and I've indulged in a couple of adult bevs . Am I to believe that there is a 'beard' out there somewhere ? you MUST be delutional !
The right eye of the 'cherub' is the left eye of Old Scratch, and the bright left side of the cheubs head is Scrathches forehead. The bright leading end of that plume is his beard.
I think the color temperature differences in the photos hae more to do with camera differences, exposures, and ambient light/backdrop, than the actual heat of the flame. I'd think the best way to check is to directly measure the color temperature using the same load out of different barrels.Cat said:Blackpowder, when it burns is to some extent self-limiting on pressure as the higher the pressure the more the gasses emitting from the granule of powder are reduced - slowing the burning. Hence one gets very even burns from shot-to-shot in match rifle shooting with blackpowder.
I would think that the the length of the tube, and perhaps the ratio of volumes of the powder chamber to the tube (expansion ratio) coupled with the mass of the projo and the clearances involved would all affect the time of the burn which would affect the temperatures achived.
Hence, I would ASSUME that mortars would get to much less temperature extremes than longer barreled howizters or even longer barreled cannons. Thus the difference in signatures seen in the above and other pictures.
Isn't that what was just said?
I sort of circled what I see as the cherub, and labled it. I also circled what I see as the beard (well, most of the beard) and the nose of Ol' Scratch. See if it makes sense to you now. Remember, Scratch is looking up and a bit out.RocklockI said:The chrub I see is looking straight toward the cammera with his head tilled slightly his right ,our left . how can he grow a breard right our of the side of his head ?