Analysis of Combustion instability in Liquid Fuel Rocket Motors.
Abstract
The primary objective of this study is the development of a new analytical technique to be used in the solution of nonlinear velocity-sensitive combustion instability problems. Such a method should be relatively easy to apply and should require relatively little computation time. In an attempt to achieve this aim, the orthogonal collocation method is investigated first. However, it is found that the results are heavily dependent on the location of the collocation points and characteristics of the equations. Therefore, the method is rejected as unreliable. Next, the Galerkin method, which has proved to be very successful in analysis of the pressure sensitive combustion instability, is considered. This method is found to work very well. It is found that the pressure wave forms exhibit a strong second harmonic distortion and a variety of behaviors are possible depending on the nature of the combustion process and the parametric values involved. Finally, a one-dimensional model provides further insight into the problem by allowing a comparison of Galerkin solutions with more exact finite-difference computations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1979
- Accession Number
- ADA078729
Entities
People
- J. Peddieson Jr.
- K. Wong
- M. Ventrice
Organizations
- Tennessee Technological University