Semi-active system for providing a required fluid flow

A semi-active system for providing a required fluid flow, the system comprising:

• an outlet protruding from a surface into a main flow direction of an external fluid flow along the surface and external to the semi-active system;
• an exhaust channel provided, in relation to the main flow direction of the external fluid flow, beneath the outlet, the exhaust channel being configured to inject an exhaust fluid flow into the external fluid flow so that the exhaust fluid flows along the surface with the external fluid flow;
• a device configured to produce a jet fluid flow;
• and
• a pipe provided within the exhaust channel, the pipe being configured to:
• fluid-communicatively couple to the device, and
• entrain, by the produced jet fluid flow, the exhaust fluid flow,
• wherein the pipe comprises a first end connected to the device and a second, open end disposed within in the exhaust channel and below the outlet.