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magnetar
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Gun is a kind of heat engine? if so ,the efficiency of a gun is limited by carnot heat engine?
Gordianus said:Within this framework the powder´s energy can be totally transformed into kinetic energy.
Gordianus said:I believe we´re disscussing a "theoretical" gun. No friction, reversible adiabatic expansion and such.
Danger said:Doesn't this overlook the significant amount of heat absorbed by both the barrel and the bullet, or are you postulating for your 'ideal' gun that such doesn't occur?
I don't think a water gun or pneumatic gun can be considered a heat engine, since they aremki said:Lojzek
How about water gun or pneumatic gun, can it be consider a heat engine?
In both cases you have pressure reservoir (pressure can be consider as a heat reservoir). In such case we have to consider the idea of external combustion.
There might be another consideration:
In both cases , guns and heat engine can be categorized as a pressure to velocity converters.
A heat engine is a device that converts heat energy into mechanical work. It typically involves a cycle of heating and cooling a working fluid, such as steam or gas, to produce movement and generate power.
A gun works as a heat engine by converting the chemical energy of gunpowder into heat energy, which then expands the gas and propels the bullet forward. This expansion of gas creates pressure, which in turn creates mechanical work to move the bullet out of the barrel.
Yes, any firearm that uses the principles of converting heat energy into mechanical work can be considered a heat engine. This includes both traditional firearms such as handguns and rifles, as well as more modern weapons like automatic weapons and artillery.
Like other heat engines, guns use a working fluid (gunpowder and gas) to convert heat energy into mechanical work. They also follow the same general principles of thermodynamics, such as the conservation of energy and the conversion of heat into work.
Yes, there are several factors that can affect the efficiency of a gun as a heat engine. These include the type and quality of gunpowder used, the design of the gun and its barrel, the condition of the gun, and external factors such as temperature and air resistance.