Français
2. Hydraulic sources of permanent excitation
Generally speaking, the aim is to quantify, in terms of the torque applied to the rotor, the cyclic variations in pressure and speed on the contact surfaces between the mechanical part in question (propeller blades, turbo-machine impeller vanes) and the surrounding fluid.
Among the main factors responsible for torsional excitation of boat propellers, we'd like to highlight the following:
the movement of the sea and of the boat;
a point defect affecting a blade ;
the proximity of the fairing.
The fundamental pulsation (in radians per second) of the exciter torque generated is :
The Ultimate Scientific and Technical Reference
This article is included in
Mechanical functions and components
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Hydraulic sources of permanent excitation
Electromagnetic sources of permanent excitation
