Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Flow-induced Vibration of Transonic Turbine Cascades Considering Viscosity and Shock Wave Effects

점성 및 충격파효과를 고려한 천음속 터빈 케스케이드의 유체유발 진동해석

  • 오세원 (국립경상대학교 대학원 기계항공공학부) ;
  • 박웅 (두산중공업㈜ 기술연구원) ;
  • 김동현 (국립경상대학교 기계항공공학부 및 항공기부품기술연구소)
  • Published : 2006.09.01
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Abstract

In this study, a fluid/structure coupled analysis system for simulating complex flow-induced vibration (FIV) phenomenon of cascades has been developed. The flow is modeled using Euler and Wavier-Stokes equations with different turbulent models. The fluid domains are modeled using the unstructured grid system with dynamic deformations due to the motion of structural boundary. The Spalart-Allmaras (S-A) and the SST ${\kappa}-{\omega}$ turbulent models are used to predict the transonic turbulent flows. A fully implicit time marching scheme based on the Newmark direct integration method is used in order to solve the coupled governing equations for viscous flow-induced vibration phenomena. For the purpose of validation for the developed FIV analysis system, comparison results for computational analyses of steady and unsteady aerodynamics and flutter analyses are presented in the transonic flow region. In addition, flow-induced vibration analyses for the isolated cascade and multi-blades cascade models have been conducted to show the physical fluid-structure interaction effects in the time domain.

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References

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