A stabilized ALE method for computational fluid-structure interaction analysis of passive morphing in turbomachinery

Alessio Castorrini, Alessandro Corsini, Franco Rispoli, Kenji Takizawa, Tayfun E. Tezduyar

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Computational fluid-structure interaction (FSI) and flow analysis now have a significant role in design and performance evaluation of turbomachinery systems, such as wind turbines, fans, and turbochargers. With increasing scope and fidelity, computational analysis can help improve the design and performance. For example, it can help add a passive morphing attachment (MA) to the blades of an axial fan for the purpose of controlling the blade load and section stall. We present a stabilized Arbitrary Lagrangian-Eulerian (ALE) method for computational FSI analysis of passive morphing in turbomachinery. The main components of the method are the Streamline-Upwind/Petrov-Galerkin (SUPG) and Pressure-Stabilizing/Petrov-Galerkin (PSPG) stabilizations in the ALE framework, mesh moving with Jacobian-based stiffening, and block-iterative FSI coupling. The turbulent-flow nature of the analysis is handled with a Reynolds-Averaged Navier-Stokes (RANS) model and SUPG/PSPG stabilization, supplemented with the “DRDJ” stabilization. As the structure moves, the fluid mechanics mesh moves with the Jacobian-based stiffening method, which reduces the deformation of the smaller elements placed near the solid surfaces. The FSI coupling between the blocks of the fully-discretized equation system representing the fluid mechanics, structural mechanics, and mesh moving equations is handled with the block-iterative coupling method. We present two-dimensional (2D) and three-dimensional (3D) computational FSI studies for an MA added to an axial-fan blade. The results from the 2D study are used in determining the spanwise length of the MA in the 3D study.

Original languageEnglish
Pages (from-to)967-994
Number of pages28
JournalMathematical Models and Methods in Applied Sciences
Volume29
Issue number5
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • ALE method
  • Axial-fan blade
  • Computational FSI
  • Passive morphing
  • SUPG and PSPG methods
  • Turbomachinery

ASJC Scopus subject areas

  • Modelling and Simulation
  • Applied Mathematics

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