Mixing enhancement by use of swirling jetsIt 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.
Document ID
19930061159
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kraus, Donna K. (NASA Langley Research Center Hampton, VA, United States)
Cutler, Andrew D. (George Washington Univ.; NASA, Langley Research Center Hampton, VA, United States)