Noun
exhaust velocity (plural exhaust velocities)
(aeronautics) The speed with which the exhaust gases leave the rocket engine.
According to Edgar Choueiri magnetoplasmadynamic thrusters have input power 100-500 kilowatts, exhaust velocity 15-60 kilometers per second, thrust 2.5-25 newtons and efficiency 40-60 percent. Source: Internet
Actual and effective exhaust velocity are the same in rocket engines not utilizing air. Source: Internet
Also, sometimes rocket engines have a separate nozzle for the turbo-pump turbine gas, and then calculating the effective exhaust velocity requires averaging the two mass flows as well as accounting for any atmospheric pressure. Source: Internet
Because the motion of this induced current flow is perpendicular to the magnetic field, the plasma is accelerated out into space by the Lorentz force at a high exhaust velocity (10 to 100 km/s). Source: Internet
A rocket with a high exhaust velocity can achieve the same impulse with less reaction mass. Source: Internet
Energy efficiency Plot of instantaneous propulsive efficiency (blue) and overall efficiency for a vehicle accelerating from rest (red) as percentages of the engine efficiency- note that peak vehicle efficiency occurs at about 1,6 times exhaust velocity. Source: Internet