Flow control in a wing/fuselage-type junctureThe laminar flow around a juncture formed by an unswept wing and a flat plate has been studied using a combination of smoke flow visualization, and velocity and pressure measurements. The effectiveness of swept leading-edge fillets in controlling the juncture flow field has been evaluated. Flow separation upstream of the wing leading edge is confined to a small region near the plate. This separation results in periodic shedding of horseshoe type vortices. The pressure gradient measured upstream of the leading edge in this laminar juncture is steeper than that of the turbulent flow case. The use of fillets eliminates the leading-edge flow separation and reduces the size of juncture wake, as observed from flow visualization. For one of the filleted cases, there is a significant increase in the extent of laminar flow in the juncture region, and a sizable reduction in the juncture drag.
Document ID
19880035235
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kubendran, L. R. (NASA Langley Research Center Hampton, VA, United States)
Bar-Sever, A. (NASA Langley Research Center Hampton, VA, United States)
Harvey, W. D. (NASA Langley Research Center Hampton, VA, United States)