Large-eddy simulation of a pseudo-shock system in a Laval nozzle

Journal article (2014)

Authors

J. F. Quaatz Technische Universität München
M. Giglmaier Technische Universität München
S. Hickel Technische Universität München
Nikolaus A. Adams Technische Universität München
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External organisation
Large-eddy simulation Nozzle flow Pseudo-shock system Shock-wave-boundary-layer interaction
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Published Date

01-01-2014

Language

English

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Abstract

Well-resolved Large-Eddy Simulations (LES) of a pseudo-shock system in the divergent part of a Laval nozzle with rectangular cross section are conducted and compared with experimental results. The LES matches the parameter set of a reference experiment. Details of the experiment, such as planar side walls, are taken into account, all wall boundary layers are well-resolved and no wall model is used. The Adaptive Local Deconvolution Method (ALDM) with shock sensor is employed for subgrid-scale turbulence modeling and shock capturing. The LES results are validated against experimental wall-pressure measurements and schlieren pictures. A detailed discussion of the complex flow phenomena of three-dimensional shock-wave-boundary-layer interaction, including corner vortices and recirculation zones, is presented. Limitations of RANS approaches are discussed with reference to the LES results.