Jet Propulsion/Euler turbine equation

The energy added to a stream of fluid flowing through the blades in a blade row:

$(h_{2} + u_{2}^{2} / 2) - (h_{1} + u_{1}^{2} / 2) = ω (r_{2} v_{2} - r_{1} v_{1})$

where

1 is upstream and 2 is downstream

ω is the rotor angular velocity

r is the distance from the axis of the stream tube upstream and downstream

v is the swirl (tangential) velocity component of the fluid velocity upstream and downstream

u is the impeller tip speed, which is defined as, u = (diameter in inches X RPM)/229.18

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