US Patent 10018121 Flow outlet

A bleed flow discharge device for discharging bleed flow into a main fluid flow. The bleed flow discharge device has an outlet panel that comprises distinct first and second regions, both of which have bleed flow exit passages. The first region is at the downstream end of the bleed flow outlet panel relative to the main flow. The exit passages in the first region are closely aligned to a major axis of the outlet panel, whereas the exit passages in the second region have a component that points towards a perimeter edge of the exit panel. This arrangement results in good mixing of the bleed flow with the bypass flow, delayed attachment of the bleed flow onto the bypass duct surfaces, and low noise.