Fluid actuator for influencing the flow along a flow surface, as well as blow-out device and flow body comprising a like fluid actuator

A fluid actuator for influencing a flow along a flow surface by pulsating ejection of a fluid flowing through the fluid actuator, the fluid actuator comprising:

• a plurality of outlet devices, wherein each outlet device comprises at least two separate outlet openings for ejection of the fluid and an outlet line corresponding with each outlet opening and merging into the outlet openings;
• at least two interaction chambers, wherein each interaction chamber is in fluid-communicating connection with the separate outlet openings of the respective outlet device and comprises one flow dividing device for dividing a feed fluid flow into the outlet lines of the respective outlet device;
• a feed line which conducts the feed fluid flow into all of the interaction chambers, and
• a common control pressure varying device comprising a control flow dividing device,
• wherein control lines for mutually influencing the fluid flow from the common feed line are connected to the control flow dividing device, the control lines each comprising corresponding control openings which conduct a control fluid flow into all of the interaction chambers to generate respective different control pressures by supplying the control fluid flow at respective different control pressures into the at least two interaction chambers, and
• wherein each control line comprises a feedback line which merges into the control flow dividing device so that supplying the control fluid flow into the control flow dividing device generates an alternating control fluid flow from the control lines to alternatingly cause a majority of the feed fluid flow to pass into one of the outlet lines of each interaction chamber and, thus, causing a pulsating flow in the outlet lines,
• wherein the fluid flowing through the fluid actuator comprises at least the feed fluid flow and the control fluid flow, and
• wherein the control pressure varying device further comprises a control feed line and the control lines, the control flow dividing device having a branching section for branching the flow from the control feed line into each of the control lines and the corresponding feedback line which is connected to the respective control line through at least one control line outlet device downstream from the branching section and at least one control line inlet device in a region of the branching section upstream from the corresponding control line outlet device in a direction of the control fluid flow.