An experimental investigation of unsteady propeller forces was conducted using model propellers operating in idealized axial wakes. Three-bladed propellers were operated behind 3-, 6-, 9- and 12-cycle wake screens generating blade rate and multiple axial wake inflow harmonics. The axial wake distributions were measured using a Pitot tube. Unsteady propeller bearing thrust and torque were measured with an unsteady force dynamometer. Measurements were compared to calculations using unsteady propeller lifting surface theory. Also, Laser Doppler Velocimetry (LDV) was used to measure the unsteady flow field about the propeller. LDV measurements were used to evaluate the effect of the propeller on the incoming wake. Keywords: Marine propellers; Unsteady loads; Bearing forces; Model tests; Propeller blades. (edc)
Measurement of Multiple Blade Rate Unsteady Propeller Forces
1990
60 pages
Report
Keine Angabe
Englisch
Marine Engineering , Fluid Mechanics , Unsteady flow , Flow fields , Loads(Forces) , Marine propellers , Propeller blades , Axial flow , Bearings , Distribution , Doppler systems , Dynamometers , Harmonics , Laser velocimeters , Lifting surfaces , Model tests , Pitot tubes , Theory , Thrust , Torque , Wake , Unsteady propeller lifting surface theory , Unsteady loads , Bearing forces
Influence of Blade Thickness on Unsteady Propeller Forces
Tema Archiv | 2012
|Unsteady forces on counter-rotating propeller blades
AIAA | 1986
|Unsteady propeller forces and hull pressure pulses in waves
TIBKAT | 2019
|