摘要:
A system and method for dissipating vortices that form at the wingtips on aircraft and from other airfoils. A jet air stream is discharged in a location at or proximate to the outer end portion of the airfoil into the vortex flow, and the jet air stream is moved cyclically back and forth. The cyclic movement can be at lower or higher frequencies to alleviate at least in part intensity of the vortex or accelerate instability of the vortex which leads to vortex dissipation.
摘要:
Active systems and methods for controlling aircraft vortices are disclosed. An apparatus in accordance with one embodiment is directed to an aircraft system that includes an airfoil having first and second oppositely facing flow surfaces and a tip. The system can further include a vortex dissipation device carried by the airfoil, with the vortex dissipation device including an orifice positioned to direct a flow of fluid outwardly from the tip, an actuator operatively coupled to the fluid flow orifice and positioned to change a manner in which flow is directed outwardly from the tip, and a controller operatively coupled to the actuator to direct the operation of the actuator. The vortex dissipation device can be activated to accelerate the rate at which vortices (e.g., wing tip vortices) dissipate after they are generated, for example, by alternately pulsing flow inwardly and outwardly through the fluid flow orifice.
摘要:
A power generation device that provides power to an auxiliary system on an airborne platform, includes a piezoelectric energy harvesting device and an energy storage unit, including a battery and a power conditioner. The device extracts energy generated by turbulent airflow around the platform and stores the energy to meet future power requirements. The piezoelectric energy harvesting device is located on a portion of an inner surface of an outward shell of the platform. The stand-alone power generation device is electrically connected to the auxiliary system. The stand-alone power generation device also includes a router that connects the power generation unit to the platform electrical distribution system. Excess power generated by the device may be delivered to the platform electrical distribution system for use by other platform systems.
摘要:
A stand-alone power generation device that provides power to an auxiliary system on an airborne platform, includes a piezoelectric energy harvesting device and an energy storage unit, including a battery and a power conditioner. The device extracts energy generated by turbulent airflow around the platform and stores the energy to meet future power requirements. The piezoelectric energy harvesting device is located on a portion of an inner surface of an outward shell of the platform. The stand-alone power generation device is electrically connected to the auxiliary system. The stand-alone power generation device also includes a router that connects the power generation unit to the platform electrical distribution system. Excess power generated by the device may be delivered to the platform electrical distribution system for use by other platform systems.
摘要:
A stand-alone power generation device that provides power to an auxiliary system on an airborne platform, includes a piezoelectric energy harvesting device and an energy storage unit, including a battery and a power conditioner. The device extracts energy generated by turbulent airflow around the platform and stores the energy to meet future power requirements. The piezoelectric energy harvesting device is located on a portion of an inner surface of an outward shell of the platform. The stand-alone power generation device is electrically connected to the auxiliary system. The stand-alone power generation device also includes a router that connects the power generation unit to the platform electrical distribution system. Excess power generated by the device may be delivered to the platform electrical distribution system for use by other platform systems.
摘要:
A system and methods for a self-rotating fluidic traverse actuator are presented. A turbine rotates in response to a fluid flow, and an outer cylinder with a longitudinal slot that ejects the fluid flow. An inner cylinder rotates inside the outer cylinder in response to a rotation of the turbine and at least one helical slot of the inner cylinder ejects the fluid flow into the longitudinal slot.
摘要:
Systems and methods for reducing the trailing vortices and lowering the noise produced by the side edges of aircraft flight control surfaces, tips of wings and winglets, and tips of rotor blades. A noise-reducing, wake-alleviating device is disclosed which incorporates an actuator and one or more air-ejecting slot-shaped openings coupled to that actuator and located on the upper and/or lower surfaces and/or the side edges of an aircraft flight control surface or the tip of a wing, winglet or blade. The actuation mechanism produces sets of small and fast-moving air jets that traverse the openings in the general streamwise direction. The actuation destabilizes the flap vortex structure, resulting in reduced intensity of trailing vortices and lower airplane noise.
摘要:
A power generation device that provides power to an auxiliary system on an airborne platform, includes a piezoelectric energy harvesting device and an energy storage unit, including a battery and a power conditioner. The device extracts energy generated by turbulent airflow around the platform and stores the energy to meet future power requirements. The piezoelectric energy harvesting device is located on a portion of an inner surface of an outward shell of the platform. The stand-alone power generation device is electrically connected to the auxiliary system. The stand-alone power generation device also includes a router that connects the power generation unit to the platform electrical distribution system. Excess power generated by the device may be delivered to the platform electrical distribution system for use by other platform systems.
摘要:
Systems and methods for reducing the trailing vortices and lowering the noise produced by the side edges of aircraft flight control surfaces, tips of wings and winglets, and tips of rotor blades. A noise-reducing, wake-alleviating device is disclosed which incorporates an actuator and one or more air-ejecting slot-shaped openings coupled to that actuator and located on the upper and/or lower surfaces and/or the side edges of an aircraft flight control surface or the tip of a wing, winglet or blade. The actuation mechanism produces sets of small and fast-moving air jets that traverse the openings in the general streamwise direction. The actuation destabilizes the flap vortex structure, resulting in reduced intensity of trailing vortices and lower airplane noise.