Mixing enhancement by use of swirling jets
Conference
·
OSTI ID:6249503
It has been proposed that the mixing of fuel with air in the combustor of scramjet engines might be enhanced by the addition of swirl to the fuel jet prior to injection. This study investigated the effects of swirl on the mixing of a 30 deg wall jet into a Mach 2 flow. Cases with swirl and without swirl were investigated, with both helium and air simulating the fuel. Rayleigh scattering was used to visualize the flow, and seeding the fuel with water allowed it to be traced through the main flow. The results show that the addition of swirl to the fuel jet causes the fuel to mix more rapidly with the main flow, that larger amounts of swirl increase this effect, and that helium spreads better into the main flow than air. 12 refs.
- OSTI ID:
- 6249503
- Report Number(s):
- AIAA-Paper--93-3126; CONF-930714--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
COHERENT SCATTERING
FLOW VISUALIZATION
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
MIXING
RAYLEIGH SCATTERING
SCATTERING
SUPERSONIC FLOW
TURBULENT FLOW
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
COHERENT SCATTERING
FLOW VISUALIZATION
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
MIXING
RAYLEIGH SCATTERING
SCATTERING
SUPERSONIC FLOW
TURBULENT FLOW