The effect of duct geometry on the performance of rov thrusters

The effect of duct geometry on the performance of an ROV thruster was examined. By conducting open water tests of thrusters with various ducts the forces acting on each were measured. The results showed that the thrust increases as the intake and exit diameter of the the of the duct increase, but it decreases as length duct increases. A comparison between the highest thrust produced by an RCV225 thruster and published results for other ducted propellers was made. Taking into account operational requirements, it was felt that relatively short duct ( modification would improve the performance of the of NSMB 19A a ) RCV225 thruster and seems worthy of closer investigation for many other ROV applications.