摘要:
Disclosed is a system and method for suppressing rotor noise by distributing mass and momentum sources and sinks on the rotor blade. A source is located on the blade, and therefore has the directivity of moving, as opposed to a stationary source. Moreover, the motion of the blade with respect to the observer amplifies the sound from the source in a manner similar to the manner in which motion of the blade amplifies all other sources of noise associated with the rotating blade. Two sources can be used to cancel noise. The first source, created by ejecting air from or drawing air into the blade, is used to cancel the "load" portion of rotor noise. The second source, created by developing a radial force with a proplet, is used to cancel the "thickness" portion of rotor noise. More control can be achieved by time modulating the rate of suction or the amplitude of radial force developed by said proplet.
摘要:
A vehicle is proposed with an aerodynamic module (6) in the form of at least one toroidal rotating body. The cross section of the body in question in the plane passing through the axis (OO) of rotation has an aerodynamic profile aligned along the vehicle's direction of movement.
摘要:
A fairing system according to an exemplary aspect of the present disclosure includes, among other things, a shaft fairing mounted for rotation about an axis of rotation and a planetary gear set configured to control a position of the shaft fairing about the axis of rotation.
摘要:
A bladeless pump having a cylindrical fluid pumping element (120) which rotates within a cylindrical housing (100). The fluid pumping element (120) and the cylindrical housing (100) are coaxial with one another. The housing (100) has an outer surface (102), and an inner surface (104). The inner surface (104) is formed with spirally-patterned grooves or ridges (106). Fluid pumping element (120) has a substantially smooth outer surface (122) and is rotationally supported by shaft holders (130, 140) positioned at each end of the fluid pumping element. A motor (150) connected to one of the shaft holders (130, 140) causes rotation of the fluid pumping element (120) which causes fluid to be pumped through the grooves or ridges (106).
摘要:
The invention is an air propelled boat that has a triangular shaped hydroplaning monohull which has surface adhesion characteristics by means of a concave bottom hull. The invention also has aircraft-like control surfaces (5,6) for safety and control at high speeds. The invention is the only monohull marine craft which produces aerodynamic lift without wings and has air based propulsion (4), air based control surfaces and a unique concave planing hull.
摘要:
The invention is an air propelled boat that has a triangular shaped hydroplaning monohull which has surface adhesion characteristics by means of a concave bottom hull. The invention also has aircraft-like control surfaces (5,6) for safety and control at high speeds. The invention is the only monohull marine craft which produces aerodynamic lift without wings and has air based propulsion (4), air based control surfaces and a unique concave planing hull.
摘要:
An apparatus for a water vessel, wherein the water vessel includes at least one container configured to transport at least one vehicle, wherein the at least one container is configured to transport the at least one vehicle while the at least one container is in a body of water. The water vessel includes one or more buoyancy floats configured to maintain the at least one container afloat in the body of water. The water vessel includes a propulsion unit configured to navigate the at least one container and the at least one vehicle through the body of water.