Controlling flow separation over a curved ramp using vortex generator microjets
نویسندگان
چکیده
Introducing a fluid microjet into the boundary layer to increase momentum and hence delay separation is method for actively controlling flow region. The present work numerically analyzed control of bubble behind ramp. For this purpose, we first verified steady-state numerical results (without jet) over ramp against reliable experimental studies from literature. Next, effects introducing were also verified. A jet was then placed at three different distances above study its impact on various parameters, including velocities, Reynolds stresses, pressure, vorticity, streamlines, size. As moved further back, jet-induced upwash region grew considerably. Finally, using identical jets studied compared those single jet. indicated that three-jet array shrank bubble. Using an with d/ D = 15 (distance between microjets diameter) can limit laterally about 2.75 times smaller than in z-direction. Also, employment managed decrease length zone x-direction up 78%, case L x / 1 0.0143 (longitudinal distance length) 10.
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2022
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0122831