Actively Controlled Afterburner for Compact Waste Incinerator.
Abstract
Active control of fluid dynamics has been used to enhance mixing in incinerator afterburner experiments and increase the DRE for a waste surrogate. Experiments were conducted in a 50 kW scale burner in two configurations: one with direct modulation of the fuel and waste (GB), and another with indirect modulation of starved air pyrolysis surrogate (AB). The open loop active control system is based on the concept of combustion in periodic axisymmetric vortices. Acoustic excitation was used to stabilize coherent vortices in the central air flow of a dump combustor like configuration. The fuel and waste are injected annularly at the dump. In the AB configuration, acoustic drivers modulate the fuel injection directly. In the AB configuration, the pyrolysis surrogate is modulated indirectly by periodic entrainment created by roll-up of the main air vortex, as well as acoustic excitation of secondary air injection. In both cases the phase angle is controlled such that the combustibles are introduced into the air vortex at the right time during the vortex formation. This leads to good mixing, a controlled yet lifted partially premixed flame, high DRE, and low emissions.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1996
- Accession Number
- ADA363479
Entities
People
- K. C. Schadow
- K. J. Wilson
- R. A. Smith
- T. P. Parr
Organizations
- Naval Air Warfare Center Weapons Division