A thermal regulation apparatus for pool water is an apparatus that is used to regulate the overall temperature of a pool in an efficient and cost-effective manner. The apparatus may include a water-jet adapter, a tee tubing connector, a valved spout, a valved drain, and an extension pipe. The water-jet adapter enables the apparatus to be connected to a water return jet and serves as the main water inlet of the apparatus. The tee tubing connector distributes the water inflow from the water-jet adapter to the valved drain and the extension pipe. The extension pipe guides the water inflow towards the valved spout. The valved spout serves as the main outlet for the apparatus and enables the cooling of the water outflow that is diffused back into the pool. The valved drain serves as a secondary outlet for the apparatus and helps control the water flow through the apparatus.

A thermal regulation apparatus for pool water is an apparatus that is used to regulate the overall temperature of a pool in an efficient and cost-effective manner. The apparatus may include a water-jet adapter, a tee tubing connector, a valved spout, a valved drain, and an extension pipe. The water-jet adapter enables the apparatus to be connected to a water return jet and serves as the main water inlet of the apparatus. The tee tubing connector distributes the water inflow from the water-jet adapter to the valved drain and the extension pipe. The extension pipe guides the water inflow towards the valved spout. The valved spout serves as the main outlet for the apparatus and enables the cooling of the water outflow that is diffused back into the pool. The valved drain serves as a secondary outlet for the apparatus and helps control the water flow through the apparatus.

A plurality of resistance-imparting portions (34A to 34E) are disposed adjacent to each other. A first contraction flow portion forming one of the resistance-imparting portions (34A to 34E) adjacent to each other is in communication with an enlarged diameter portion forming another resistance-imparting portion. First contraction flow portions (32AH to 32DH) forming the resistance-imparting portions (34A to 34E) adjacent to each other are disposed at different positions in a direction in which an outer frame member (31) extends.

The invention relates to a fluid transport pipe. A first unit channel in which a channel cross-sectional area continuously decreases toward a downstream side and a second unit channel in which a channel cross-sectional area continuously increases toward the downstream side are alternately combined. A ratio A (=L/{[Smax].sup.1/2-[Smin].sup.1/2}) is set within a range in which a drag reduction rate R.sub.D becomes a positive value. The fluid transport pipe includes: a first opening formed in a channel wall of the first unit channel; a second opening formed in a channel wall of the second unit channel; and a bypass channel that allows by-passing of a flow from the first unit channel to the second unit channel through the openings.

A profiled element used is disclosed for generating a force, the profiled element comprising a material having an active surface; a plurality of cavities located on the active surface of the material, the plurality of cavities comprising pin holes, each pin hole having an opening of a micrometric size on the active surface and a depth of a micrometric size greater than its diameter; wherein each pin hole is hermetically sealed on the opposite side of the cavity; and further wherein an airflow circulation against the active surface of the material causes a pressure change on the active surface and inside each of the plurality of cavities thereby generating a force.

A profiled element used is disclosed for generating a force, the profiled element comprising a material having an active surface; a plurality of cavities located on the active surface of the material, the plurality of cavities comprising pin holes, each pin hole having an opening of a micrometric size on the active surface and a depth of a micrometric size greater than its diameter; wherein each pin hole is hermetically sealed on the opposite side of the cavity; and further wherein an airflow circulation against the active surface of the material causes a pressure change on the active surface and inside each of the plurality of cavities thereby generating a force.

An aircraft gas transport system including a high pressure gas supply line having a supply valve, and an equilibrium gas line joined at junctions with the high pressure gas supply line upstream and downstream from the supply valve, and in flow communication with the high pressure gas supply line, the equilibrium gas line having an equilibrium valve and a flow restrictor, the equilibrium valve having an exit orifice and the flow restrictor being offset from the exit orifice of the equilibrium valve.

An aircraft gas transport system including a high pressure gas supply line having a supply valve, and an equilibrium gas line joined at junctions with the high pressure gas supply line upstream and downstream from the supply valve, and in flow communication with the high pressure gas supply line, the equilibrium gas line having an equilibrium valve and a flow restrictor, the equilibrium valve having an exit orifice and the flow restrictor being offset from the exit orifice of the equilibrium valve.

A device for reducing friction of a viscous fluid flow in a conduit is disclosed. The device comprises a body positionable to define at least a segment of a flow path for the viscous fluid in or contiguous with the conduit, a cavity in the body for retaining lubricating fluid, and at least one port in the body for delivering lubricating fluid to the cavity. A fluid outlet arrangement from said cavity delivers lubricating fluid to the flow path to form a downstream lubricating film at the conduit surface. The fluid outlet arrangement comprises a substantially continuous opening or ring of close spaced openings, effective collectively to reduce the pressure variation and therefore velocity variation of the delivered lubricating fluid along said outlet arrangement.

A device for reducing friction of a viscous fluid flow in a conduit is disclosed. The device comprises a body positionable to define at least a segment of a flow path for the viscous fluid in or contiguous with the conduit, a cavity in the body for retaining lubricating fluid, and at least one port in the body for delivering lubricating fluid to the cavity. A fluid outlet arrangement from said cavity delivers lubricating fluid to the flow path to form a downstream lubricating film at the conduit surface. The fluid outlet arrangement comprises a substantially continuous opening or ring of close spaced openings, effective collectively to reduce the pressure variation and therefore velocity variation of the delivered lubricating fluid along said outlet arrangement.