A diffuser may comprise an inlet and an outlet. The inlet may comprise an arcuate shape. The outlet may comprise an annular shape. The diffuser may transition from the arcuate shape at the inlet to the annular shape at the outlet. The diffuser may comprise a radially inner wall and a radially outer wall disposed opposite the radially inner wall. The radially inner wall and the radially outer wall may partially define a duct.

A Brayton cycle engine including a longitudinal wall extended along a lengthwise direction. The longitudinal wall defines a gas flowpath of the engine. An inner wall assembly is extended from the longitudinal wall into the gas flowpath. The inner wall assembly defines a detonation combustion region in the gas flowpath upstream of the inner wall assembly.

A Brayton cycle engine including a longitudinal wall extended along a lengthwise direction. The longitudinal wall defines a gas flowpath of the engine. An inner wall assembly is extended from the longitudinal wall into the gas flowpath. The inner wall assembly defines a detonation combustion region in the gas flowpath upstream of the inner wall assembly.

The application relates to an anti-back-transfer intake structure of a rotating detonation combustion chamber including a Tesla valve communicating with the rotating detonation combustion chamber and arranged at an inlet of the rotating detonation combustion chamber. The Tesla valve includes a casing and a flow passage, the casing is coaxially connected with an outer wall of the rotating detonation combustion chamber, the flow passage is arranged in the casing, and the flow passage has an inlet end for introducing air, and an outlet end connected with an annular passage of the rotating detonation combustion chamber.

The application relates to an anti-back-transfer intake structure of a rotating detonation combustion chamber including a Tesla valve communicating with the rotating detonation combustion chamber and arranged at an inlet of the rotating detonation combustion chamber. The Tesla valve includes a casing and a flow passage, the casing is coaxially connected with an outer wall of the rotating detonation combustion chamber, the flow passage is arranged in the casing, and the flow passage has an inlet end for introducing air, and an outlet end connected with an annular passage of the rotating detonation combustion chamber.

A power driver of an unmanned aerial vehicle is disclosed and includes a main body, a fluid actuation system and a controller, wherein the fluid actuation system includes a driving zone, a converging chamber, a plurality of valves and a fluid discharging zone. The driving zone includes a plurality of flow guiding units which arranged in series, parallel or series-parallel, each of the flow guiding unit generates an inside pressure gradient after being actuated, so as to inhale fluid and diverge fluid by guiding channels, and flow into the convergence chamber for storage, wherein the amount of the fluid transported is controlled by the plurality of valves disposed in the connection channels through the controller, and fluid is finally converged to the fluid discharging zone for discharging the specific transportation amount of fluid.

A power driver of an unmanned aerial vehicle is disclosed and includes a main body, a fluid actuation system and a controller, wherein the fluid actuation system includes a driving zone, a converging chamber, a plurality of valves and a fluid discharging zone. The driving zone includes a plurality of flow guiding units which arranged in series, parallel or series-parallel, each of the flow guiding unit generates an inside pressure gradient after being actuated, so as to inhale fluid and diverge fluid by guiding channels, and flow into the convergence chamber for storage, wherein the amount of the fluid transported is controlled by the plurality of valves disposed in the connection channels through the controller, and fluid is finally converged to the fluid discharging zone for discharging the specific transportation amount of fluid.

The encased exhaust is a traditional aftermarket expansion chamber muffler system for a two stroke engine encompassing a duct fan/propeller. The propeller is mounted directly to the engine's driveshaft, eliminating reduction gears and belts allowing for more airflow and less weight. This eliminates the muffler and replaces the cage on a paramotor, allowing for more airflow through the funneled air duct. The configuration of these two functions exists but not in this sequence, that is what makes this product unique.

The encased exhaust is a traditional aftermarket expansion chamber muffler system for a two stroke engine encompassing a duct fan/propeller. The propeller is mounted directly to the engine's driveshaft, eliminating reduction gears and belts allowing for more airflow and less weight. This eliminates the muffler and replaces the cage on a paramotor, allowing for more airflow through the funneled air duct. The configuration of these two functions exists in a particular sequence.

A Brayton cycle engine including a longitudinal wall extended along a lengthwise direction. The longitudinal wall defines a gas flowpath of the engine. An inner wall assembly is extended from the longitudinal wall into the gas flowpath. The inner wall assembly defines a detonation combustion region in the gas flowpath upstream of the inner wall assembly.