Turbulent-flame characterization for improved gas-burner performance. Annual report for November 1983-November 1984
A flow visualization study of a range of practical type burner flames was performed to help define an idealized burner for detailed laser diagnostics. Direct-flame pictures, short-exposure schlieren and high-speed schlieren movies were taken of bluff, radial, and coaxial fuel injector flames with and without divergent quarl and combustion air swirl. Both the radial and coaxial injector flames were characterized by small, fast-moving turbulent fuel-jet structures, and large, slow-moving cold flame boundary outer structures. Bluff-body fuel-injector flames were characterized by an attached recirculation zone, and in some cases, an extended flame emanating from the recirculation zone, and in some cases, an extended flame emanating from the recirculation zone. By varying the fuel and air flow rates, a wide variety of stable flames were produced. The fuel-jet structures for these flames were similar to those observed in the coaxial and radial injector flames. However, only small- to moderate-scale structures were observed in the outer regions of the bluff-body flames. Given the stability, diversity, practicality, and uniqueness of the bluff-body flame, an idealized version of this burner was designed and fabricated. Characterization tests with this burner showed that most of the conventional-burner flame and mixing-structure characteristics were observed in the idealized burner flames.
- Research Organization:
- Acurex Corp., Mountain View, CA (USA). Energy and Environmental Div.
- OSTI ID:
- 5784069
- Report Number(s):
- PB-85-180495/XAB
- Resource Relation:
- Other Information: Color illustrations reproduced in black and white
- Country of Publication:
- United States
- Language:
- English
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