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Thermal Performance Study of the 155mm XM297 Actively Cooled Barrel.

ADA586742

Publication Date	2006
Personal Author	Witherell, M. D.
Page Count	13
Abstract	The Crusader Self Propelled Howitzer will employ an actively cooled 155mm cannon to meet its high rate of fire performance requirements. The actively cooled cannon includes both integral mid-wall cooling of the barrel's chamber region, and outer surface cooling for the remaining length of the barrel. A thermal study was conducted to better understand the thermal performance characteristics of the actively cooled 155mm XM297 barrel under severe firing conditions. Thermal calculations were made using the FDHEAT gun tube heat transfer model which was modified to include an cooling capability. The FDHEAT program models the effects of the barrel heating due to round firing, radial and axial conduction within the barrel wall, convective and radiative cooling, and heat removal by the active cooling system. The study identified an optimum radiator size for the cannon and also showed that, compared to an un- cooled barrel, an actively cooled cannon has superior performance characteristics for firing engagements involving multiple, high rate of fire missions.
Keywords	Cooling Gun barrels Howitzers Coolants Heat transfer Radiators(Heating and cooling) 155mm xm297 howitzer Cannon barrels Fdheat heat transfer model Gun tubes Heat removal Thermal studies
Source Agency	Non Paid ADAS
NTIS Subject Category	79G - Guns 46 - Physics
Corporate Authors	Army Armament Research, Development and Engineering Center, Watervliet, NY. Benet Labs.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	201405

Thermal Performance Study of the 155mm XM297 Actively Cooled Barrel.

Thermal Performance Study of the 155mm XM297 Actively Cooled Barrel.
ADA586742

Publication Date	2006
Personal Author	Witherell, M. D.
Page Count	13
Abstract	The Crusader Self Propelled Howitzer will employ an actively cooled 155mm cannon to meet its high rate of fire performance requirements. The actively cooled cannon includes both integral mid-wall cooling of the barrel's chamber region, and outer surface cooling for the remaining length of the barrel. A thermal study was conducted to better understand the thermal performance characteristics of the actively cooled 155mm XM297 barrel under severe firing conditions. Thermal calculations were made using the FDHEAT gun tube heat transfer model which was modified to include an cooling capability. The FDHEAT program models the effects of the barrel heating due to round firing, radial and axial conduction within the barrel wall, convective and radiative cooling, and heat removal by the active cooling system. The study identified an optimum radiator size for the cannon and also showed that, compared to an un- cooled barrel, an actively cooled cannon has superior performance characteristics for firing engagements involving multiple, high rate of fire missions.
Keywords	Cooling Gun barrels Howitzers Coolants Heat transfer Radiators(Heating and cooling) 155mm xm297 howitzer Cannon barrels Fdheat heat transfer model Gun tubes Heat removal Thermal studies
Source Agency	Non Paid ADAS
NTIS Subject Category	79G - Guns 46 - Physics
Corporate Authors	Army Armament Research, Development and Engineering Center, Watervliet, NY. Benet Labs.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	201405