Shear-Coaxial Jets in a Transverse Acoustic Field at High Pressures
Final rept. Jun 2007 - Jun 2009
CALIFORNIA UNIV LOS ANGELES DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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The goal of this research effort has been to perform experiments on and explore the physics associated with a non-reactive, cryogenic, shear coaxial jet interacting with high pressure, high amplitude acoustic waves. These experiments have been conducted in the AFRL cryogenic supercritical laboratory facility at Edwards AFB by a UCLA graduate student Juan Rodriguezas part of his Ph.D. dissertation. The flow configuration, which is similar to that, typically used in cyrogenic liquid rocket systems, allows exploration of the effect of phase and amplitude on chamber acoustic interactions with a shear coaxial jet operating under subcritical, relevance of the observed jet response to phenomena associated with self excitation in liquid rocket combustion instabilities. The effects of magnitude and phase of the acoustic field generated within the chamber on non-reactive coaxial jet dark core lengths and spreading angles have been explored in detail for two alternative injector geometries.
- Theoretical Mathematics
- Fluid Mechanics