Total temperature, denoted as , is a thermodynamic property used in fluid dynamics and aerodynamics to describe the sum of the static temperature and the kinetic energy per unit mass of a fluid flow. It represents the total energy content of a fluid stream, including both its internal thermal energy and the energy associated with its motion.
- : Total temperature (in kelvin, K).
- : Static temperature (in kelvin, K) of the fluid.
- : Specific heat ratio (dimensionless), which is the ratio of specific heat capacities at constant pressure () and constant volume () for the fluid.
- : Specific gas constant (in joules per kilogram per kelvin, J/(kg·K)) for the particular gas.
- : Velocity of the fluid flow (in meters per second, m/s).