Please enable JavaScript.
Coggle requires JavaScript to display documents.
Jet Propulsion - Coggle Diagram
Jet Propulsion
Thrust developed
\( T= \rho V_J A (V_J - V) \)
\( \rho V_J A \) - Mass of water discharged per time
\( V_J \) - Discharge veloc
\( V_J - V \) - Change in veloc
Disadvantages
Loss of volume
inside of ship
due to ducting
Danger of fouling impeller
by debris
Difficulty to obtain
uniform flow into impeller
Efficiency
\( \eta = \dfrac{2V}{V_J + V} \)
\( V_J \) = V
Higher efficiency = 1
Thrust zero
Of propeller
not pump
Advantages
High manoeuvring ability
Reduced
External appendage drag
Oldest known
Mechanical propulsion
Really low Efficiency