Forced Response of a Low-Pressure Turbine Blade using ‎Spectral/hp Element Method: Direct Numerical Simulation‎

Daniel Wacks, Mahdi Erfanian Nakhchi Toosi*, Mohammad Rahmati

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The Spectral/HP element method has been applied to perform Direct Numerical Simulations (DNS) over a single T106A turbine blade-row using the open source software Nektar++. The main goal of the current study is to perform preliminary investigations at modest Reynolds and Mach numbers, 8000 and 0.1 respectively, for uniform, steady flow past the aerofoil by employing Nektar++’s solver for the 2D Navier-Stokes equations for incompressible flow. The mesh was firstly validated against results obtained using the same software and for a similar set of parameter values. One dimensional, pitch-wise harmonic vibrations were subsequently imposed on the blade by means of a coordinate transformation. A parametric study in terms of the frequency and amplitude of the vibrations was carried out. The effects of the vibrations on entire domain, along the blade surface and in its wake were assessed. The pressure on the blade surface and the wake loss were each decomposed into components arising due to the mean flow and due to the vibrations. In each case the dominant components were then identified for the values of frequency and amplitude considered here.
Original languageEnglish
Pages (from-to)135-147
Number of pages13
JournalJournal of Applied and Computational Mechanics
Volume7
Issue number1
Early online date24 Sep 2020
DOIs
Publication statusPublished - 1 Jan 2021

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