A method of modeling a turbine mounted behind an aircraft wing for providing a specified proportion of a propulsive force in the aircraft flight direction to an amount of power generated by the turbine when driven by the airflow trailing the wings. The turbine converts a portion of the otherwise wasted energy in the rotational vortices trailing the aircraft wings into thrust that reduces aircraft drag while also providing electricity to power electrical systems on the aircraft. The method is also capable of modeling a turbine construction that will use the energy in the wake solely to generate electricity without increasing drag on the aircraft or solely to reduce drag without generating electricity. In one embodiment, the method saves computation time by using a recursive routine to define a preliminary turbine configuration based on an idealized vortex model and then matches it to the flow trailing an actual aircraft wing.
A wind-driven power generating system with a hybrid wind turbine mounted on a floating platform that heels relative to horizontal in the presence of a prevailing wind. The hybrid turbine has a turbine rotor with at least two rotor blades, each mounted to a turbine shaft by at least one strut, and the system is configured so that the shaft forms a predetermined non-zero operating heel angle relative to vertical in the presence of a prevailing wind at a predetermined velocity. The blades and struts are airfoils with predetermined aerodynamic characteristics that generate lift forces with components in the direction of rotation around the shaft of the blades and struts at the operating heel angle to drive an electrical generator carried by the platform. The system can be designed to generate maximum power at the predetermined heel angle or essentially constant power over a range of heel angles.
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
A wind-driven power generating system with a hybrid wind turbine mounted on a floating platform that heels relative to horizontal in the presence of a prevailing wind. The hybrid turbine has a turbine rotor with at least two rotor blades, each mounted to a turbine shaft by at least one strut, and the system is configured so that the shaft forms a predetermined non-zero operating heel angle relative to vertical in the presence of a prevailing wind at a predetermined velocity. The blades and struts are airfoils with predetermined aerodynamic characteristics that generate lift forces with components in the direction of rotation around the shaft of the blades and struts at the operating heel angle to drive an electrical generator carried by the platform. The system can be designed to generate maximum power at the predetermined heel angle or essentially constant power over a range of heel angles.
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
A wind-driven power generating system with a hybrid wind turbine mounted on a floating platform that heels relative to horizontal in the presence of a prevailing wind. The hybrid turbine has a turbine rotor with at least two rotor blades, each mounted to a turbine shaft by at least one strut, and the system is configured so that the shaft forms a predetermined non-zero operating heel angle relative to vertical in the presence of a prevailing wind at a predetermined velocity. The blades and struts are airfoils with predetermined aerodynamic characteristics that generate lift forces with components in the direction of rotation around the shaft of the blades and struts at the operating heel angle to drive an electrical generator carried by the platform. The system can be designed to generate maximum power at the predetermined heel angle or essentially constant power over a range of heel angles.
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
Controlled-debris elements inhibit the formation of a fibrous/particulate debris bed that unduly increases the pressure head loss through the perforated plates of strainers in a nuclear power plant emergency core cooling system. In a loss of cooling accident, pumps draw cooling water through the plates, which retain on their surfaces fibrous material in the circulating water to prevent it from reaching the pumps while permitting entrained particulate matter to pass through the perforations. The controlled-debris elements have a specific gravity substantially the same as the circulating water so they are entrained in the cooling water that is drawn toward the strainers and intimately intermix with the fibrous and particulate matter in the cooling water. The elements are configured to provide open structures in the bed formed on the plate surfaces to distribute fibers in the flow away from the surface and maintain cavities between the elements for the particulates.
B01D 29/00 - Filtres à éléments filtrants stationnaires pendant la filtration, p.ex. filtres à aspiration ou à pression, non couverts par les groupes ; Leurs éléments filtrants
G21C 19/307 - Dispositions pour introduire un matériau fluent à l'intérieur du cœur du réacteur; Dispositions pour enlever un matériau fluent du cœur du réacteur avec purification continue du matériau fluent en circulation, p.ex. par extraction des produits de fission spécialement adaptés pour des liquides
B01D 29/01 - Filtres à éléments filtrants stationnaires pendant la filtration, p.ex. filtres à aspiration ou à pression, non couverts par les groupes ; Leurs éléments filtrants avec des éléments filtrants plats
G21C 1/08 - Réacteurs hétérogènes, c. à d. dans lesquels le combustible et le modérateur sont séparés le modérateur étant hautement pressurisé, p.ex. réacteur à eau bouillante, réacteur à surchauffe intégrale, réacteur à eau pressurisée
G21C 15/18 - Dispositions pour le refroidissement d'urgence; Mise hors circuit de la chaleur
B01D 24/00 - Filtres à substance filtrante non agglomérée, c. à d. à substance filtrante sans aucun liant entre les particules ou les fibres individuelles qui la composent
B01D 24/28 - Filtres à substance filtrante non agglomérée, c. à d. à substance filtrante sans aucun liant entre les particules ou les fibres individuelles qui la composent avec le lit filtrant mobile pendant la filtration
B01D 24/20 - Filtres à substance filtrante non agglomérée, c. à d. à substance filtrante sans aucun liant entre les particules ou les fibres individuelles qui la composent avec le lit filtrant stationnaire pendant la filtration la substance filtrante étant placée dans un récipient ouvert
E02B 3/02 - Régulation de cours d'eau, p.ex. dérochement sous l'eau, nettoyage de lits de cours d'eau, orientation du courant
B01D 33/00 - Filtres avec éléments filtrants mobiles au cours de l'opération de filtration
G and γ that cause the lift generated by each blade to have an upward component that supports the blade against the force of gravity and a mean radially inward component that substantially balances centrifugal forces on the blade. Wind turbines designed according to the principles disclosed herein facilitate the construction of free-floating utility scale wind turbines for deep water installations.
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 9/25 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil étant un générateur électrique
7.
NUCLEAR REACTOR USING CONTROLLED DEBRIS TO MITIGATE ECCS STRAINER PRESSURE HEAD LOSS
Controlled-debris elements inhibit the formation of a fibrous/particulate debris bed that unduly increases the pressure head loss through the perforated plates of strainers in a nuclear power plant emergency core cooling system. In a loss of cooling accident, pumps draw cooling water through the plates, which retain on their surfaces fibrous material in the circulating water to prevent it from reaching the pumps while permitting entrained particulate matter to pass through the perforations. The controlled-debris elements have a specific gravity substantially the same as the circulating water so they are entrained in the cooling water that is drawn toward the strainers and intimately intermix with the fibrous and particulate matter in the cooling water. The elements are configured to provide open structures in the bed formed on the plate surfaces to distribute fibers in the flow away from the surface and maintain cavities between the elements for the particulates.
B01D 29/00 - Filtres à éléments filtrants stationnaires pendant la filtration, p.ex. filtres à aspiration ou à pression, non couverts par les groupes ; Leurs éléments filtrants
G21C 19/18 - Appareils pour porter les éléments combustibles à l'aire de charge du réacteur, p.ex. depuis un emplacement de stockage
8.
Method and apparatus for suppressing flow-induced jet pump vibration in a boiling water reactor
Flow induced vibration (FIV) at the slip joint between a nuclear reactor jet pump mixer and diffuser is suppressed without installing additional parts or altering the jet pump construction. The disclosed method determines a relationship between reactor operating conditions that trigger FIV and the magnitude of a mixer/diffuser transverse contact load. A mathematical analysis on a representative jet pump configuration determines the quantitative relationship between mixer/diffuser cold positions and their positions when the reactor is operating. Thus, a prediction can be made as to whether an installed jet pump will experience FIV, and the mixer and diffuser can be positioned by a mixer adjustment tool when the reactor is cold to provide the necessary operational transverse contact load. Alternatively, a contact load measuring tool directly measures the magnitude and direction of the cold mixer/diffuser transverse contact load to determine if FIV will be suppressed when the reactor is operating.
A wind-driven power generating system with a hybrid wind turbine mounted on a floating platform that heels relative to horizontal in the presence of a prevailing wind. The hybrid turbine has a turbine rotor with at least two rotor blades, each mounted to a turbine shaft by at least one strut, and the system is configured so that the shaft forms a predetermined non-zero operating heel angle relative to vertical in the presence of a prevailing wind at a predetermined velocity. The blades and struts are airfoils with predetermined aerodynamic characteristics that generate lift forces with components in the direction of rotation around the shaft of the blades and struts at the operating heel angle to drive an electrical generator carried by the platform. The system can be designed to generate maximum power at the predetermined heel angle or essentially constant power over a range of heel angles.
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
G and γ that cause the lift generated by each blade to have an upward component that supports the blade against the force of gravity and a mean radially inward component that substantially balances centrifugal forces on the blade. Wind turbines designed according to the principles disclosed herein facilitate the construction of free-floating utility scale wind turbines for deep water installations.
F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à vent; Pylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
F03D 9/25 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil étant un générateur électrique
11.
Supersonic engine inlet diffuser with deployable vortex generators
A flow control device generates counter-rotating vortices in the boundary layer of the flow in a supersonic inlet diffuser for an aircraft turbine engine. The flow control device comprises a flap attached to the duct wall for selective deployment, wherein it extends into the boundary layer, and retraction, wherein it lies substantially flush with the duct wall. In one embodiment an actuating mechanism comprising one or more shape-memory alloy wires moves the flap between two stable positions. In another embodiment the deployment height of the flap can be controlled as desired, preferably using a shape-memory alloy actuating mechanism. Typically, an array of plural flow control devices is disposed in the inlet duct for selective actuation according to a predetermined schedule.
An apparatus for attenuating acoustic resonance generated by flow over a cavity in a surface comprises a plurality of flat flaps proximate to an upstream edge of the cavity. The flaps are disposed in an array spaced in a width direction of the cavity edge, and are oscillated by the flow in two degrees of freedom solely by the flow, independent of an actuation mechanism. Each flap includes a first hinge generally coextensive with the surface for enabling oscillation in a first degree of freedom and a second hinge orthogonal to the first hinge and forming a tab for enabling oscillation in a second degree of freedom. The hinges are constructed with torsional spring constants that provide predetermined oscillation frequencies and magnitudes. The apparatus can include a deployment mechanism for moving each flap between a stowed position wherein it is generally flush with the surface and a deployed position wherein the flap can be oscillated by the flow.
A strainer for an emergency core cooling system (ECCS) in a nuclear power plant comprises a perforated strainer element that is immersed in a reservoir of cooling water, which is drawn through the strainer element into the emergency core cooling system. The side of the strainer element in contact with the cooling water has a contoured configuration for disrupting the formation of a flat bed of fibrous material that can trap small particulate material intended to pass through the strainer element. Incorporating this strainer element into an ECCS strainer enables the strainer to be made more compact, because the debris bed need not be spread over an unduly large area to prevent excessive head loss from the debris load in the event of a reactor loss of coolant accident. The strainer also incorporates a modular construction that uses individual strainer disc modules. Each disc module includes a perforated first disc part having a central opening and a perforated second disc part also having a central opening. The first and second disc parts fit together to form an interior space with facing perforated major surfaces and an axial opening, and connecting tubes between the discs place the axial openings in fluid communication. The entire assembly is secured together by tie rods that hold the discs together with the connecting tubes compressed between them.
G21C 9/00 - Dispositions pour la protection d'urgence structurellement associées avec le réacteur
G21C 19/30 - Dispositions pour introduire un matériau fluent à l'intérieur du cœur du réacteur; Dispositions pour enlever un matériau fluent du cœur du réacteur avec purification continue du matériau fluent en circulation, p.ex. par extraction des produits de fission
B01D 29/07 - Filtres à éléments filtrants stationnaires pendant la filtration, p.ex. filtres à aspiration ou à pression, non couverts par les groupes ; Leurs éléments filtrants avec des éléments filtrants plats avec des supports à feuilles filtrantes ondulées, pliées ou enroulées
B01D 39/08 - Tissus filtrants, c. à d. matériau tissé, tricoté ou entrelacé
B01D 39/12 - Tamis filtrants essentiellement métalliques en métal expansé
A trash rack for an emergency core cooling system of a nuclear power plant comprises at least one wire-mesh upright screen for filtering debris from coolant flowing in the cooling system. The upright screen is mounted in the coolant flow path with its bottom edge on the floor of an area forming part of the cooling system and a top edge is disposed above the floor at a height less than the level to which the coolant can be expected to rise during a loss of cooling accident. The trash rack also uniquely includes a wire-mesh roof screen that has a downstream edge mated with the top edge of the upright screen and extending upstream thereof to an upstream end spaced from the floor, thereby presenting an unobstructed opening between the floor and the upstream edge of the roof screen.
B01D 29/00 - Filtres à éléments filtrants stationnaires pendant la filtration, p.ex. filtres à aspiration ou à pression, non couverts par les groupes ; Leurs éléments filtrants
brevets
