COMPUTATIONAL SIMULATION OF THE FLOW-INDUCED VIBRATION OF A HYDRAULIC TURBINE STAY VANE

Renato Venturatto Junior¹; Bruno Souza Carmo¹

¹ Universidade de São Paulo

doi:10.20906/CPS/COB-2015-0950

Resumo

This article presents a methodology developed to perform a detailed computational simulation of the flow-induced vibration of a hydraulic turbine stay vane. The flow around the vanes was computed using a commercial CFD code, ANSYS Fluent, and the calculation of the structural response and its coupling with the flow equations was done with User Defined Functions. With this methodology, the structural response of the vane for a range of operational flow conditions can be analyzed, and the situations for which resonance occurs can be identified. A proper design of the vane should avoid such situations, because they can lead to structural failure or decrease of the vane's service life. The methodology developed has the advantage of helping the design of such components without depending excessively on experimental methods or empirical rules. Also, it allows either modifying existing profiles or choosing the best shape for new ones based on the best manufacturing criteria.

Palavras-chave: Fluid-Structure Interaction; Hydraulic Turbines; Computational Simulation; Flow-Induced Vibration