Mixing and Combustion Mechanisms in High-Speed Flows.
Abstract
A modular model for the analysis of turbulent reacting flows in dump combustors has been formulated and preliminary calculations have been carried out. The methodology involves coupling a stirred reactor model for the recirculation zone(s) to a parabolic mixing model for the directed flow outside of the recirculation zones. This modular model includes the finite-rate formulations of Edelman and the turbulent kinetic energy turbulence models of Harsha. Elements of the model have been compared with available experimental data and other predictions. The results of the comparison have shown that the model is capable of accurate predictions of turbulent reacting flows. Additional work has included the submission of a series of recommended tests to WPAFB/AFAPL. These tests are designed to get data of direct practical use as well as data needed for model development. Steady-state combustion performance and flame stabilization as functions of fuel type, injector location and type, direct injection into the base recirculation zone and inlet flow state are included. Measurements include pressures, temperatures, flow rates, concentrations and thrust as well as direct observation of flame blowout (stabilization). Finally, recommendations for future work have been defined. These include further development of the modular model and the initiation of a unified model. In addition, it is recommended that consideration be given to the impact that the use of alternate (non-petroleum) fuels will have on the combustion characteristics of advanced combustor concepts. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1976
- Accession Number
- ADA033619
Entities
People
- P. T. Harsha
- R. B. Edelman