Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Simulation of casting process of marine propellers
Submission Author:
Helder Santana , PA , Brazil
Co-Authors:
Helder Santana, Erb Lins
Presenter: Helder Santana
doi://10.26678/ABCM.COBEM2017.COB17-2657
Abstract
Producing marine propellers are very important to the Amazon, mainly because it is the largest navigable river of the world. The most common problems found in boats of the region are the lack of technical procedures for the propellers' design. During the casting process, it is very common to observe micro-structural defects. In this paper, a numerical approach is applied to the study of solidification of metallic alloys during the casting process of marine propellers. The aiming is an evaluation of a liquid-solid interface that advances in heat extraction direction, in order to improve this process. A small marine propeller with 0.26 m diameter was computationally built. An optimized procedure was used to get the blade hydrodynamic shape. Simulations using the finite volume method were performed with ANSYS FLUENT. The solidification of fluid phase and heat transfer within the metal-cast was analyzed taking into account a computational sand mold. As a result, the temperature gradient in the three-dimensional space and cooling curves at any point of the propeller was obtained. The solidification is faster at the blade tip than close to the shaft. The proposed modeling shows physical consistency, demonstrating that it may be used in the microstructural characterization of solidified metal.
Keywords
Casting Process, Solidification, Heat transfer, Finite Volume Method.
