Numerical study of transonic cavity flows using large-eddy and detached-eddy simulation

Nayyar, P., Barakos, G. N. and Badcock, K. J. (2007) Numerical study of transonic cavity flows using large-eddy and detached-eddy simulation. Aeronautical Journal, 111(1117), pp. 153-164. (doi: 10.1017/S0001924000004413)

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Numerical analysis of the flow in weapon bays modelled as open rectangular cavities of length-to-depth (L/D) ratio of 5 and width-to-depth (W/D) ratio of 1 with doors-on and doors-off is presented. Flow conditions correspond to Mach and Reynolds numbers (based on cavity length) of 0.85 and 6.783m respectively. Results from unsteady Reynolds-averaged Navier-Stokes (URANS), large-eddy simulation (LES) and detached-eddy simulation (DES) are compared with the simulation methods demonstrating the best prediction of this complex flow. It was found that URANS was not able to predict the change of flow characteristics between the doors-on and doors-off configurations. In addition, the energy content of the cavity flow modes was much better resolved with DES and LES. Further, the DES was found to be quite capable for this problem giving accurate results (within 3dB of) experiments and appears to be a promising alternative to LES for modelling massively separated flows.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Barakos, Professor George
Authors: Nayyar, P., Barakos, G. N., and Badcock, K. J.
College/School:College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Journal Name:Aeronautical Journal
Publisher:Royal Aeronautical Society

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