CUED Publications database

Efficient and affordable high order, high fidelity large eddy simulations for industrial level problems

Lu, Y and Liu, K and Dawes, WN (2017) Efficient and affordable high order, high fidelity large eddy simulations for industrial level problems. In: UNSPECIFIED.

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For several years we have been developing a fast, high fidelity, high order Large Eddy Simulation system targeted at cheap, commodity, small scale, many-core computing clusters. Our objective is to deliver efficient & affordable application of LES to complex, multi-scale, real geometry, industrial class problems. Our technical approach is based on an innovative space time extention of a high order Flux Reconstruction method (STEFR) which allows time-accurate local time stepping. In this paper, two numerical investigations are presented: a transonic high Reynolds number NASA acoustic reference nozzle and a real geometry aircraft nose landing gear used in the BANC Workshops. These are presented together with computer resource statistics, aerodynamic and acoustic noise comparisions with experimental data and power spectrum density (PSD) plots. The Fflowcs William-Hawkings (FWH) integration is used for acoustic post-processing for the transonic nozzle case on a virtual structured surface mesh around jet flow. Additionally, this paper presents an innovative Hierarchical Proper Orthogonal Decomposition (HPOD) method which has been developed for data analysis in parallel, on-the-fly, and which extracts the most energetic modes by performing a two-level orthogonal projection as a Reduced Order Method. This has the potential to save post-processing memory requirement significantly for analysis of massive “big data” high order transient results.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 15 Nov 2018 01:53
Last Modified: 10 Apr 2021 00:41
DOI: 10.2514/6.2017-0742