An Investigation on the Influence of Step Height, Flow Straightening, and Flameholders on Dump Combustor Afterburner Performance
Abstract
An investigation was made on the performance of a small turbojet/dump combustor afterburner combination as a function of varying afterburner step height, straightening of the exhaust flow swirl from the turbine exit, and installing flameholders of varying degrees of blockage. Results indicated that a step height of 0.5 inch provided the greatest increase in performance with respect to thrust, thrust specific fuel consumption, augmentation ratio, and specific thrust. Performance was degraded in all cases when flow straighteners were used. Likewise, the addition of Y-shaped, V-gutter flameholders also degraded performance and in some cases made lighting the afterburner impossible. This result confirmed and expanded the data in reference 1. Comparing efficiencies tended to show decreasing efficiency with increasing step height.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA081895
Entities
People
- James A. Poier
Organizations
- Air Force Institute of Technology