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, particularly by pulsating ejection of a fluid flowing through the fluid actuator, comprising a multiplicity of outlet devices each having at least two outlet openings for ejection of the fluid and at least two outlet lines each merging into the outlet openings, the fluid actuator comprising:

• at least two interaction chambers which are in fluid-communicating connection with separate outlet openings via respective separate outlet lines and which comprise one flow dividing device each in each interaction chamber for dividing the flows into the outlet lines merging from a feed line into the interaction chambers;
• a control pressure varying device comprising a control flow dividing device to which the control lines are connected for mutually influencing the flow, wherein control lines for supplying fluid at respective different control pressures into the at least one interaction chamber are formed so as to alternatingly bring about the flow of the fluid at least majoritarily into a respective one of the outlet lines, and each control line comprises a feedback line merging into the control flow dividing device, so that if a fluid flow is supplied into the control flow dividing device, an alternating control flow from one respective control line and thus a pulsating flow in the outlet lines is brought about, said control lines comprising branchings merging in corresponding control openings in the interaction chambers to furnish the respective different control pressures there.