A fluidic system is disclosed. The system comprises a plurality of fluidic oscillatory actuators, and at least one synchronization conduit connecting two or more of the actuators such as to effect synchronization between oscillations in the two or more connected actuators.

A vortex ring generation device includes a casing having a discharge port, an extrusion mechanism, and a component supply port. The extrusion mechanism extrudes air in an air passage inside the casing such that the air is discharged, in a vortex ring shape, from the discharge port. The component supply port surrounds the air passage. A total circumferential length of the component supply port is ½ or more of a total circumferential length of the discharge port. The extrusion mechanism includes a vibration plate and a drive unit that vibrates the vibration plate. The air passage includes a first passage, and a throttle passage continuous with a downstream end of the first passage. A component chamber is provided inside the casing. The component chamber contains a discharge component to be supplied to the component supply port. The component supply port is located downstream of the throttle passage.

The present invention is directed to an improved fluid diode using topology optimization with Finite Element Method (FEM). Topology optimization as a flexible optimization method has been extended to the fluid field. For given boundary conditions and constraints, it distributes a specific amount of pores (or remove materials to get channel) in the design domain to minimize/maximize an objective function. In this design, inlet and outlet ports are aligned and inflow and outflow are in the same direction. The present invention features an intricate network of fluid channels having optimized fluid connectivity and shapes, which significantly improves the diodicity of fluidic passive valves.

In some examples, a device includes a first fluidic amplifier stage, configured to receive a fluidic input and provide a first stage fluidic output, and a second fluidic amplifier stage, configured to receive the first stage fluidic output and provide a second stage fluidic output. The first fluidic amplifier stage may include a fluidic valve, for example having a source, a gate, and a drain. The fluidic input may be connected to the gate of the fluidic valve through a fluid channel, and a fluid flow between the source and the drain of the fluidic valve may be controlled by the fluidic input. An example device may be configured to provide a fluidic output, wherein the fluidic output is based on the fluidic input, and the fluidic output may be provided to a fluidic load such as an actuator.

In some examples, a device includes a first fluidic amplifier stage, configured to receive a fluidic input and provide a first stage fluidic output, and a second fluidic amplifier stage, configured to receive the first stage fluidic output and provide a second stage fluidic output. The first fluidic amplifier stage may include a fluidic valve, for example having a source, a gate, and a drain. The fluidic input may be connected to the gate of the fluidic valve through a fluid channel, and a fluid flow between the source and the drain of the fluidic valve may be controlled by the fluidic input. An example device may be configured to provide a fluidic output, wherein the fluidic output is based on the fluidic input, and the fluidic output may be provided to a fluidic load such as an actuator.

In some examples, a device includes a fluidic circuit may be configured to receive a fluidic input (and optionally a fluidic bias) and to provide a fluidic output based on the fluidic input. In some examples, the fluidic output may be a fluidic difference output based on a difference (such as a pressure and/or flow difference) between the fluidic input and a fluidic bias. In some examples, a device includes a fluidic amplifier configured to receive the fluidic difference output, and to provide a device fluidic output based on the fluidic difference output. The device fluidic output may be provided to a fluidic load, which may include an actuator and/or a haptic device.

In some examples, a device includes a fluidic circuit may be configured to receive a fluidic input (and optionally a fluidic bias) and to provide a fluidic output based on the fluidic input. In some examples, the fluidic output may be a fluidic difference output based on a difference (such as a pressure and/or flow difference) between the fluidic input and a fluidic bias. In some examples, a device includes a fluidic amplifier configured to receive the fluidic difference output, and to provide a device fluidic output based on the fluidic difference output. The device fluidic output may be provided to a fluidic load, which may include an actuator and/or a haptic device.

An active separation control system, comprising a fluidic oscillatory actuator having an ejector member, an oscillator member, and a joining channel between said oscillator member and said ejector member, all mounted on at least one flexible member, said fluidic oscillatory actuator being mountable on a rotatable door of a vehicle such that said flexible member assumes a different shape when said door is closed than when said door is open, wherein said joining channel is also flexible to assume a shape of said flexible member.

A vortex ring generation device includes a casing having a discharge port, an extrusion mechanism, and a component supply port. The extrusion mechanism extrudes air in an air passage inside the casing such that the air is discharged, in a vortex ring shape, from the discharge port. The component supply port surrounds the air passage. A total circumferential length of the component supply port is or more of a total circumferential length of the discharge port. The extrusion mechanism includes a vibration plate and a drive unit that vibrates the vibration plate. The air passage includes a first passage, and a throttle passage continuous with a downstream end of the first passage. A component chamber is provided inside the casing. The component chamber contains a discharge component to be supplied to the component supply port. The component supply port is located downstream of the throttle passage.

A vortex ring generation device includes a casing having a gas passage and a discharge port, and an extrusion mechanism that extrudes a gas in the gas passage such that the gas in a vortex ring shape is discharged from the discharge port. V (m.sup.3) represents an extrusion volume, D (m) represents a diameter of the discharge port, L (m) represents a length of a cylinder having the diameter D and the volume V, and Re represents a Reynolds number of the discharged gas. 500Re3000 and 0.5L/D2.0.