Three-Dimensional Instability of Shock-Wave/Boundary-Layer Interaction for Rocket Engine Nozzle Applications
A fully three-dimensional analysis is carried out on an overexpanded rocket engine nozzle configuration to investigate the role of the internal shock-induced separation on the mechanism of generation of side loads during start-up and shutdown transients. A hybrid URANS/LES approach based on the delayed detached eddy simulation turbulence model is used. Reasonable good agreement is obtained between numerical and experimental results. The numerical wall-pressure spectrum shows a narrow peak that a dynamic mode decomposition reveals to be associated with a mode whose characteristics resemble the experimental azimuthal mode believed to be the cause of the generation of side loads.
- 1.Nave, L. H. and Coffey, G. A., Sea level side loads in high-area-ratio rocket engines, AIAA Paper 1973-1284, 1973Google Scholar
- 2.Aghababaie, A., Experimental Characterisation and Analytical Modelling of Rocket Nozzle Side-Loads, PhD thesis, University of Bristol, 2013Google Scholar
- 3.Shams, A., Contribution to the Numerical Simulation of Turbulent Shock-Induced Separated Flows, PhD thesis, Universite de Poitiers, 2011Google Scholar
- 10.Jameson, A., Time-dependent calculations using multigrid with applications to unsteady flows past airfoils and wings, AIAA Paper 1991-1596, 1991Google Scholar