초록 ▼

A fluid actuator for influencing the flow along a flow surface by ejecting a fluid flowing through the fluid actuator is described. The fluid actuator has at least two outlet lines with outlet openings at the respective ends thereof, and a feed line connected to the outlet lines for feeding fluid at

A fluid actuator for influencing the flow along a flow surface by ejecting a fluid flowing through the fluid actuator is described. The fluid actuator has at least two outlet lines with outlet openings at the respective ends thereof, and a feed line connected to the outlet lines for feeding fluid at a supply pressure, a flow direction diverting device into which the feed line opens and out of which the outlet lines open, and an adjusting device coupled to the flow direction diverting device to control the latter. The adjusting device is configured so the fluid is conducted successively in a cyclic sequence into each of the outlet lines. A discharge device for discharging a fluid out of a flow body, and a flow body having a multiplicity of discharge openings and a discharge device of said type are also described.

대표청구항 ▼

1. A fluid actuator for influencing the flow along a flow surface by ejection of a fluid flowing through the fluid actuator, comprising at least two outlet lines having outlet openings provided at the respective ends thereof, wherein in an end portion of the outlet lines their width increases and th

1. A fluid actuator for influencing the flow along a flow surface by ejection of a fluid flowing through the fluid actuator, comprising at least two outlet lines having outlet openings provided at the respective ends thereof, wherein in an end portion of the outlet lines their width increases and their depth decreases such that the cross-sectional area of the respective outlet line remains substantially constant relative to the respective cross-sectional area of the outlet opening of the outlet lines, and a supply line connected to the outlet lines for supplying fluid at a feed pressure, a flow direction deflecting device into which the supply line merges and from which the outlet lines emerge, and an actuating device coupled with the flow direction deflecting device for controlling the latter, which is adapted such that the fluid is successively conducted into each one of the outlet lines in a cyclical sequence. 2. A fluid actuator for influencing the flow along a flow surface through ejection of a fluid flowing through the fluid actuator, comprising: an outlet device having at least two outlet lines and at least two openings for ejecting a fluid, one of which is communicated with a respective outlet line, wherein in an end portion of the outlet lines, their width increases and their depth decreases such that the cross-sectional area of the respective outlet line remains substantially constant relative to the respective cross-sectional area of the outlet opening of the outlet lines,an interaction chamber which is communicated with each one of the outlet openings via a respective flow line and which includes a flow-dividing device arranged at the inlet of the outlet lines,a supply line to the interaction chamber for supplying fluid into the interaction chamber at a feed pressure,at least two control lines, each for supplying fluid at a predetermined control pressure, and each of which is connected by an end to the interaction chamber, wherein the interaction chamber is configured such that when fluid is supplied at a predetermined control pressure through a respective one of the control lines, the fluid flowing at a feed pressure into the interaction chamber through the supply line to the interaction chamber is deflected into one respective predetermined outlet line from among the outlet lines, so that multi-stable flow conditions are achieved in the actuator by the configuration of the interaction chamber. 3. The fluid actuator according to claim 2, wherein the fluid actuator comprises two outlet lines and two control lines, and that the flow-dividing device is a spike-type wall member of the interaction chamber which is situated between the two outlet lines. 4. The fluid actuator according to claim 2, wherein the supply line to the interaction chamber comprises a connection to a fluid supply device. 5. The fluid actuator according to claim 2, wherein the two control lines are each connected by one end to a pressure control device, and each presents a connection to a fluid supply device. 6. The fluid actuator according to claim 2, wherein the first outlet line and the second outlet line are situated in opposition to each other relative to the longitudinal axis of the actuator, and in particular symmetrically with respect to the longitudinal axis, and wherein the control lines are in opposition to a respective one of the inlet openings of the outlet lines relative to the center of the interaction chamber. 7. The fluid actuator according to claim 2, wherein the fluid actuator comprises three outlet lines and two control lines, and wherein the flow-dividing device comprises a first spike-type wall member which is situated between the inlets of a first and a second outlet line, and a second spike-type wall member which is situated between the inlets of a third and a second outlet line. 8. The fluid actuator according to claim 7, wherein the first outlet line and the third outlet line are situated in opposition to each other relative to the longitudinal axis of the fluid actuator and in particular symmetrically with respect to the longitudinal axis, the second outlet line being situated between the first outlet line and the third outlet line and in particular centrally on the longitudinal axis of the fluid actuator. 9. The fluid actuator according to claim 7, wherein the fluid supply line is situated in opposition to the second outlet line relative to the center of the interaction chamber, and each one of the control lines is situated in opposition to a respective inlet opening of the first or third outlet line relative to the center of the interaction chamber. 10. The fluid actuator according to claim 7, wherein the fluid actuator comprises a third control line, with the first, second and third control lines having a star-shaped arrangement with regard to the spatial center, such that each control line and a respective one of the outlet lines are situated in opposition to each other relative to the spatial center of the interaction chamber. 11. The fluid actuator according to claim 2, wherein the cross-sectional area of the respective outlet line remains constant within a margin of deviation of 10% relative to the respective cross-sectional area of the outlet opening of the outlet lines. 12. The fluid actuator according to claim 2, wherein in order to control and alter the inflow of fluid through the respective control line, a respective control valve of a switching device belonging to the actuating device is connected to each one of the control lines for operating the valves. 13. A blow-out device for ejecting a fluid from a flow body, comprising a fluid actuator according to claim 1 and an actuating device, wherein the actuating device comprises a chamber having an opening for supplying fluid at a control pressure, a plurality of control valves each of which is associated to a respective control line, and a switching device, said switching device being adapted for setting switching conditions of the control valves, wherein one respective valve of the plurality of control valves is opened and the at least another valve from among the plurality of control valves is closed,wherein the actuating device comprises a switching device activating device which is functionally communicated with the switching device via a connecting line for the transmission of switching commands and which activates the switching device such that the control valves are taken into a succession of the switching conditions where, in a cyclical sequence, a respective one of the control valves is in an open condition while the at least another control valve from among the plurality of control valves is in a closed condition,wherein the control pressure is provided such that in every switching condition, the fluid introduced into the interaction chamber at the feed pressure flows at a ratio of at least 75% into precisely one respective outlet line associated to said switching condition,wherein in an end portion of the outlet lines, their width increases and their depth decreases such that the cross-sectional area of the respective outlet line remains constant relative to a respective cross-sectional area of an outlet opening of the outlet lines. 14. A blow-out device for ejecting a fluid from a flow body, comprising a fluid actuator having at least two outlet lines with outlet openings provided at the respective ends thereof and a supply line connected to the outlet lines for supplying fluid at a feed pressure, wherein in an end portion of the outlet lines, their width increases and their depth decreases such that the cross-sectional area of the respective outlet line remains constant relative to a respective cross-sectional area of an outlet opening of the outlet lines, a flow direction deflecting device into which the supply line merges and from which the outlet lines emerge, and an actuating device coupled to the flow direction deflecting device for activating the latter, wherein the actuating device includes an activating function whereby the flow direction deflecting device performs a deflection of a predetermined volume flow of the fluid supplied via the supply line into a respective one of the outlet lines, the fluid being successively conducted into each one of the outlet lines in a cyclical sequence. 15. The blow-out device according to claim 14, wherein the switching device activating device may be used for adjusting the frequency of the cyclical setting of switching conditions. 16. The blow-out device according to claim 14, wherein a sensor for detecting the flow condition is arranged on each outlet line, each sensor being functionally coupled with the respective switching device activating device for the transmission of sensor signals generated by the respective sensor, wherein the switching device activating device includes a regulating function which generates activating commands based on the respective received sensor signals and a target specification, and transmits them to the switching device for operating the latter. 17. A flow body comprising a plurality of ejection openings and a blow-out device according to claim 14. 18. The flow body according to claim 17, wherein one respective actuating device is associated to a plurality of interaction chambers.