Large eddy simulation of shock train phenomena in a gas dynamic flow passage

2018 ◽  
Author(s):  
Md. Saddam Hossain Joy ◽  
A. B. M. Toufique Hasan
Keyword(s):  
Large Eddy Simulation ◽  
Shock Train ◽  
Dynamic Flow ◽  
Flow Passage ◽  
Eddy Simulation ◽  
Gas Dynamic ◽  
Large Eddy

Large eddy simulation of shock train in a convergent–divergent nozzle

2014 ◽  
Vol 25 (04) ◽  
pp. 1450003 ◽  
Author(s):  
Seyed Mahmood Mousavi ◽  
Ehsan Roohi
Keyword(s):  
Experimental Data ◽  
Large Eddy Simulation ◽  
Numerical Solutions ◽  
Turbulence Modeling ◽  
Turbulence Models ◽  
Reynolds Stress Model ◽  
Shock Train ◽  
Eddy Simulation ◽  
Starting Point ◽  
Large Eddy

This paper discusses the suitability of the Large Eddy Simulation (LES) turbulence modeling for the accurate simulation of the shock train phenomena in a convergent-divergent nozzle. To this aim, we selected an experimentally tested geometry and performed LES simulation for the same geometry. The structure and pressure recovery inside the shock train in the nozzle captured by LES model are compared with the experimental data, analytical expressions and numerical solutions obtained using various alternative turbulence models, including k–ε RNG, k–ω SST, and Reynolds stress model (RSM). Comparing with the experimental data, we observed that the LES solution not only predicts the "locations of the first shock" precisely, but also its results are quite accurate before and after the shock train. After validating the LES solution, we investigate the effects of the inlet total pressure on the shock train starting point and length. The effects of changes in the back pressure, nozzle inlet angle (NIA) and wall temperature on the behavior of the shock train are investigated by details.

Sign in / Sign up

Export Citation Format

Share Document