Numerical Visualization of the Pseudo-Shock Waves using LES

LES를 이용한 Pseudo-Shock Waves의 가시화

  • Published : 2015.12.31


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.


Pseudo-Shock Waves;Rectangular Nozzle;LES Simulation;Corner Flow;3D Visualization


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Supported by : National Research Foundation of Korea (NRF), Seoul National University