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http://dx.doi.org/10.5407/JKSV.2015.13.3.029

Numerical Visualization of the Pseudo-Shock Waves using LES  

Deng, Ruoyu (School of Mechanical Engineering, Andong National University)
Jin, Yingzi (School of Mechanical Engineering, Andong National University)
Kim, Heuy Dong (School of Mechanical Engineering, Andong National University)
Publication Information
Journal of the Korean Society of Visualization / v.13, no.3, 2015 , pp. 29-34 More about this Journal
Abstract
The interaction between a normal shock wave and a boundary layer along a wall surface in internal compressible flows causes a very complicated flow. This interaction region containing shock train and mixing region is called as pseudo-shock waves. Pseudo-shock waves in the divergent part of a rectangular nozzle have been investigated by using large-eddy simulation (LES). LES studies have been done for the complex flow phenomena of three-dimensional pseudo-shock waves. The LES results have been validated against experimental wall-pressure measurements. The LES results are in good agreement with experimental results. Pseudo-shock length and corner separation have been studied in three-dimensional LES model. Comparison of centerline pressure measurement and 3D visualization measurement has been discussed for the corner separation position. It has been concluded that the pseudo-shock length should be measured by using 3D visualization measurement.
Keywords
Pseudo-Shock Waves; Rectangular Nozzle; LES Simulation; Corner Flow; 3D Visualization;
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