Study on Added Moment of Inertia of Propeller in Water Based on CFD Mesh Morpher Method
In order to estimate the water added moment of inertia of propeller accurately in design stage,provide more accurate design input for shafting design,and further explore the influence law of propeller design parameters on the added moment of inertia,a study about numerical calculation of water added moment of inertia is carried out.With the help of common computational fluid dynamics(CFD)software STAR-CCM+and its built-in strain net technology,a crude oil carrier propeller is chosen as research object,and the whole calculation process is carried out based on viscous Reynolds-averaged Navier-Stokes equations(RANS).On this basis,two groups of propeller models with proportional changes of chord length and pitch are obtained,and their water added moment of inertia are calculated so as to find the relationship between water added moment of inertia and design parameters.The results show that for the propeller with same chord length distribution,the proportion of added moment of inertia(added moment of inertia in water divided by its own moment of inertia)increases with the increase of pitch.For the propeller with the same pitch distribution,the proportion of added moment of inertia decreases with the increase of chord length.At last,a regression model of propeller water with additional moment of inertia and chord length and pitch is established,which help rapid prediction in design stage.
propelleradded moment of inertiastrain net methodcomputational fluid dynamics(CFD)
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