S.1 Spacecraft Propulsion Systems Chapter 1: Introduction to ...
S.1 Spacecraft Propulsion Systems Chapter 1: Introduction to ...
S.1 Spacecraft Propulsion Systems Chapter 1: Introduction to ...
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S.7 Effective Exhaust Velocity<br />
F<br />
ve = [m/s]<br />
o<br />
m<br />
ve = effective exhaust velocity [m/s]<br />
F = thrust force [N]<br />
o<br />
m = propellant mass flow rate [kg/s]<br />
- 10-<br />
From its definition as the thrust per unit rate of mass flow of propellant, it follows that ve is<br />
numerically the same as the Isp as defined above with SI units of m/s.<br />
Note: ve is the ‘effective’ exhaust velocity, - although called ‘thruster exhaust velocity’<br />
hereinafter-, because it is determined by test; therefore, in all propulsion related calculations<br />
with ve, the effective exhaust velocity has <strong>to</strong> be applied, if not stated otherwise.