Effects of swirl and high turbulence on a jet in a crossflow

Kavsaoğlu, Mehmet S.
Schetz, Joseph A.
An experimental study has been conducted on the effects of initial swirl and high turbulence in the exhaust of a circular jet injected from a flat plate at a 90-deg angle into a crossflow. The different jet types studied were low-exit turbulence (3%), high-exit turbulence (>10°7o), and 40 and 58% swirl. Surface pressure distributions and mean velocity vector plots were obtained for all of these cases. For the surface pressure distribution tests, the jet to crossflow velocity ratios R were 2.2, 4, and 8 for most of the jet types. For the mean velocity vector plots, R = 4 was chosen. Turbulence information in the jet plume was also obtained for the low-exit turbulence case at R = 4. The results showed that the higher-exit turbulence reduced the penetration height, and it also reduced the surface area influenced by negative pressures. The swirl-caused asymmetric pressure distributions and the swirl effects were more pronounced for lower-velocity ratios.

Citation Formats
M. S. Kavsaoğlu and J. A. Schetz, “Effects of swirl and high turbulence on a jet in a crossflow,” Journal of Aircraft, vol. 26, no. 6, pp. 539–546, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51703.