Investigation of Hydro-Elastic Performance of Marine Propellers Using Fluid-Structure Interaction Analysis

2015 ◽  
Author(s):  
Sangho Han ◽  
Hyoungsuk Lee ◽  
Min Churl Song ◽  
Bong Jun Chang
Keyword(s):  
Cfd Simulation ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Open Water ◽  
Elastic Interaction ◽  
Marine Propeller ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Wake Field ◽  
Propulsion Performance

To investigate the hydrodynamic benefits of composite materials marine propeller, CFD-FEM fluid structure interaction (FSI) methodology using STAR-CCM+ and Abaqus with co-simulation is adapted for the hydro-elastic interaction simulation of composite propeller. FSI simulation reliabilities are validated with experimental data of P5479 marine propeller. KP458 propeller geometry are used for CFD simulation of rigid blade and FSI simulation of flexible one under the propeller open water (POW) test condition and compared with conventional BEM-FEM results to understand the blade deformation characteristics and induced performance changes. KVLCC2-KP458 self-propulsion FSI simulations were conducted and confirmed the effect of unsteady behavior of flexible marine propeller for the propulsion performance in the wake field. From the results, the decided difference between rigid and flexible one is observed and the merits of flexible marine propeller is confirmed quantitatively.

Numerical Fluid-Structure Interaction Analysis for a Flexible Marine Propeller Using Co-Simulation Method

2021 ◽  
Vol 163 (A2) ◽  
Author(s):  
A Kumar ◽  
R Vijayakumar ◽  
VA Subramanian
Keyword(s):  
Carbon Fibre ◽  
Interaction Analysis ◽  
Fibre Composite ◽  
Fluid Structure Interaction ◽  
Open Water ◽  
Hydrodynamic Performance ◽  
Marine Propeller ◽  
Carbon Fibre Composite ◽  
Fluid Structure ◽  
Structure Interaction

Carbon fibre composite has exceptionally high strength, low density and corrosion resistance in the marine environment compared to conventional materials. These characteristics make it a favourable alternative material to be considered for manufacturing marine screw propellers. Despite these advantages, the flexibility of the material leads to a significant change in blade geometry due to loads acting on blades which alter hydrodynamic performance. A two-way coupled fluid-structure interaction analysis is required to accurately capture its hydrodynamic performance due to the reduced stiffness and material anisotropy. The present study focuses on numerical investigation for the hydro-elastic based performance analysis of a composite marine propeller in open water condition. The procedure involves the coupling of Reynolds-Averaged Navier-Stokes Equation based computational fluid dynamics solver with the finite element method solver using co-simulation technique. The open water characteristics, including thrust coefficient, torque coefficient and open water efficiency, are discussed as a function of advance ratio. This paper presents a comparison of the hydrodynamic performance and structural responses between a carbon fibre composite propeller and a conventional steel propeller which are geometrically identical. The results for the composite propeller show a significant improvement in hydrodynamic performance compared to the metallic propeller while remaining structurally safe throughout the tested range.

scholarly journals B-Spline Impulse Response Functions of Rigid Bodies for Fluid-Structure Interaction Analysis

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
S. Zhou-Bowers ◽  
D. C. Rizos
Keyword(s):  
Impulse Response ◽  
Dynamic Models ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Rigid Bodies ◽  
The Body ◽  
Impulse Response Functions ◽  
Fluid Structure ◽  
B Spline ◽  
Structure Interaction

Reduced 3D dynamic fluid-structure interaction (FSI) models are proposed in this paper based on a direct time-domain B-spline boundary element method (BEM). These models are used to simulate the motion of rigid bodies in infinite or semi-infinite fluid media in real, or near real, time. B-spline impulse response function (BIRF) techniques are used within the BEM framework to compute the response of the hydrodynamic system to transient forces. Higher-order spatial and temporal discretization is used in developing the kinematic FSI model of rigid bodies and computing its BIRFs. Hydrodynamic effects on the massless rigid body generated by an arbitrary transient acceleration of the body are computed by a mere superposition of BIRFs. Finally, the dynamic models of rigid bodies including inertia effects are generated by introducing the kinematic interaction model to the governing equation of motion and solve for the response in a time-marching scheme. Verification examples are presented and demonstrate the stability, accuracy, and efficiency of the proposed technique.

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