Performance Comparison of Finite-Volume and Spectral/hp Methods for LES of Representative Gas Turbine Combustor Aerodynamics
mediaposted on 21.06.2019, 12:30 by Vishal Saini, Gary PageGary Page
Animation from Vishal Saini's PhD project presented at Nektar++ 2019 Workshop held in Exeter (10-12 June).
The animation compares the results from a low- and high-order Large-Eddy Simulation of the combustor port flows geometry studied experimentally by Spencer and McGuirk . The contours depict the x-component of the flow velocity in a symmetry plane. Due to strong impingement of the jets, high levels of turbulence and a wide range of flow scales is generated. Despite the fact that the two simulations incur a similar computational cost, the spectral/hp fourth polynomial order simulation (right) performed using Nektar++ resolves a broader turbulence spectrum in comparison to the second-order finite-volume pimpleFoam solver (left).
 A. Spencer and J. J. Mcguirk, “LDA Measurements of Feed Annulus Effects on Combustor Liner Port Flows,” J. Fluids Eng., vol. 123, no. June 2001, pp. 219–227, 2001.