Interaction of Turbulent Air Jets with an Impinging Reacting Stream - an Application to an Advanced Air Breathing Propulsion System
Abstract
An important practical application of the interaction of turbulent air jets with an impinging reacting stream is described in this report. A system of cross-jets located upstream of the sudden expansion step of a dump burner is able to amplify the recirculation zone thereby increasing the flame spreading as well as the characteristic residence time. Furthermore, the cross- jets with mass flow rates in the range of 1% to 4% are able to smooth out rough burning in a small volume-limited burner without any additional drag penalty. The lean blow off performance, rough burning, flow field characteristics and preliminary scaling parameters for a dump burner with a system of cross-jets are given. Preliminary study of a cross-jet system performing the dual role of a vortex amplifier and swirl generator shows a great promise. Because of encouraging results, recommendations are made to expand the activity to include swirl-jets in large combustors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1977
- Accession Number
- ADA045833
Entities
People
- P. Roy Choudhury
Organizations
- Air Force Office