Abstract
‡Effects of turbulence on instabilities in solid rocket motors are investigated by numerical computations. Comparisons with experimental data in a subscale solid motor show that CFD without turbulence modeling fails to correctly predict unsteady behavior and largely overestimates experimental pressure oscillations. Two-dimensional URANS modeling substantially improves prediction and reveals for this configuration a dominant role of turbulence which hinders vortex shedding, thus altering its coupling with chamber acoustics. Effects of turbulence are enhanced by the presence of a large central cavity. The influence of numerically prescribed level of injected turbulence at the propellant surface is undertaken and does show a strong impact on pressure oscillation levels. Advanced turbulence modeling is also addressed with a full 3D Large Eddy Simulation (LES) which enables an insight into the effects of three-dimensional structures on instability level.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
