VISCOUS-FLOW COMPUTATION OF PROPELLER-HULL INTERACTION.
Conference Paper
Overview
Additional Document Info
View All
Overview
abstract
A partially-parabolic method for calculating ship-stern flow is coupled with a propeller-performance program in an interactive and iterative manner to predict the combined flow field. The overall computational method is described including the use of a body-force distribution to represent the propeller. Results are presented for both axisymmetric and three-dimensional body geometries. The axisymmetric geometries are simple propeller-shaft configurations for which extensive experimental data are available. The steady-flow calculations are in excellent agreement with the experimental data and show that the present procedures are able to predict many details of the flow field including the formation of the hub vortex and its dependence on the propeller loading. The unsteady-flow calculations, which are in reasonable agreement with the experimental data, point out the limitations of the present approach for simulating the complex blade-to-blade flow. The three-dimensional geometry combines the DTNSRDC 3:1 elliptical body with a propeller. Although no experimental data are available for this case, the results are physically realistic and indicate many interesting features, including the propeller-induced flow asymmetry.
