Investigation of Damping Methods for Augmentor Combustion Instability
Abstract
Absorbing liners or 'screech' liners are commonly used in the augmentors currently being proposed and developed can experience low frequency instabilities for which liners of conventional design are an impractical solution because of the unacceptably large volumes required for the linear resonator cavity. The objective of this program was to develop practical augmentor acoustic devices for controlling low frequency combustion instabilities. Analysis, supported by cold flow impedance experiments, indicated that dimpled array liners, i.e., liners with punched and therefore lengthened apertures, complex-porous liners having facings of two different porous materials in series, and acoustic energy absorbing flameholders could provide sufficient absorption.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1972
- Accession Number
- AD0750902
Entities
People
- Gary D. Garrison
- J. Stettler
- P. L. Russell
Organizations
- Pratt & Whitney