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Quasi-One-Dimensional Modeling of Internal Ballistics and Axial Acoustics in Solid Rocket Motors
- Source :
- Journal of Propulsion and Power. 32:882-891
- Publication Year :
- 2016
- Publisher :
- American Institute of Aeronautics and Astronautics (AIAA), 2016.
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Abstract
- An unsteady quasi-one-dimensional flow solver for simulating internal ballistics and axial acoustic fluctuations in solid rocket motors is presented in this paper. Higher-order numerical solutions of quasi-one-dimensional governing equations are prone to numerical oscillations due to the nonconservative form of the governing equations and the nonsmooth axial variations of the cross-sectional area. Adding artificial dissipation to a central scheme is found to be inadequate for suppression of such oscillations, and so a simple low dissipation shock-capturing scheme (named SLAU2) is used instead. The inherent numerical dissipation of this scheme is helpful in the proper capturing of steep-fronted acoustic waves (that develop at the onset of triggered instabilities) without undesirable numerical damping of the acoustic waves. Using the new solver, a procedure for computing characteristic frequencies, corresponding mode shapes, and damping rates is proposed and validated for a motor with a cylindrical grain ge...
- Subjects :
- Physics
020301 aerospace & aeronautics
Mechanical Engineering
Ballistics
Aerospace Engineering
02 engineering and technology
Mechanics
Acoustic wave
Solver
Dissipation
Vortex shedding
01 natural sciences
010305 fluids & plasmas
Internal ballistics
Fuel Technology
Classical mechanics
0203 mechanical engineering
Space and Planetary Science
Normal mode
0103 physical sciences
Solid-fuel rocket
Subjects
Details
- ISSN :
- 15333876 and 07484658
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Journal of Propulsion and Power
- Accession number :
- edsair.doi...........f70f5a9b85594bb40c7ae74c5b9b8891