Assessment of a high-order accurate Discontinuous Galerkin method for turbomachinery flows. Issue 4 (20th April 2016)

• Record Type: Journal Article
• Authors: Bassi, F.; Botti, L.; Colombo, A.; Crivellini, A.; Franchina, N.; Ghidoni, A.
• Is Part Of: International journal of computational fluid dynamics. Volume 30:Issue 4(2016)
• Page Start: 307
• Page End: 328
• Publication Date: 2016-04-20
• Subjects: Discontinuous Galerkin method -- rotating reference frame -- complex turbomachinery turbulent flows -- low-pressure MTU T106A turbine blade -- axial compressor rotor NASA Rotor 37; Fluid dynamics -- Data processing -- Periodicals; 532.05
• DOI: 10.1080/10618562.2016.1198783
• Languages: English
• ISSNs: 1061-8562

Abstract

ABSTRACT: In this work the capabilities of a high-order Discontinuous Galerkin (DG) method applied to the computation of turbomachinery flows are investigated. The Reynolds averaged Navier–Stokes equations coupled with the two equations k -ω turbulence model are solved to predict the flow features, either in a fixed or rotating reference frame, to simulate the fluid flow around bodies that operate under an imposed steady rotation. To ensure, by design, the positivity of all thermodynamic variables at a discrete level, a set of primitive variables based on pressure and temperature logarithms is used. The flow fields through the MTU T106A low-pressure turbine cascade and the NASA Rotor 37 axial compressor have been computed up to fourth-order of accuracy and compared to the experimental and numerical data available in the literature.