The combustion process increases the internal
energy of a gas, which translates into an increase in temperature,
pressure, or volume depending on the configuration. In an enclosure, for
example the cylinder of a reciprocating engine, the volume
is controlled and the combustion creates an increase in pressure. In a
continuous flow system, for example a jet engine combustor, the pressure
is controlled and the combustion creates an increase in volume.
This increase in pressure or volume can be used to do work, for example, to move a piston on a crankshaft or a turbine disc in a gas turbine. If the gas velocity changes, thrust is produced, such as in the nozzle of a rocket engine.
This increase in pressure or volume can be used to do work, for example, to move a piston on a crankshaft or a turbine disc in a gas turbine. If the gas velocity changes, thrust is produced, such as in the nozzle of a rocket engine.
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