Modeling Liquid Rocket Engine Atomization and Swirl/Coaxial Injectors
Abstract
This report summarizes efforts to enhance our knowledge of the dynamic processes associated with injectors in liquid rocket engines. Progress has been made on a number of fronts. Linear stability analysis has been performed to assess the wavelengths of instabilities in oxygen rich staged combustion (ORSC) injector elements. Most unstable wavelengths have been characterized over a wide parameter space to provide researchers with an understanding of drop sizes shed from fuel films in these injector elements. The dynamics of classical swirl injectors have been investigated for both single and dual tangential inlet channel designs. The use of multiple inlet channels is believed to lead wave cancellations in the chamber, thereby reducing injector response to perturbations imposed from the combustion chamber. Existing theoretical/linear models have been modified to handle the multi-channel design and show substantial reduction in injector response over a range of frequencies. Companion nonlinear calculations are also in work for both single and dual channel designs. For both cases, it appears that nonlinear effects reduce the overall amplitude of the response as compared to the linear theory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 27, 2008
- Accession Number
- ADA494724
Entities
People
- Stephen D. Heister
Organizations
- Purdue University