Abstract: A gas turbine engine includes a turbomachine defining an engine inlet to an inlet duct, a fan duct inlet to a fan duct, and a core inlet to a core duct; a primary fan driven by the turbomachine; a nacelle surrounding the primary fan; and a secondary fan located downstream of the primary fan within the inlet duct. The gas turbine engine is characterized by a thrust to power airflow ratio, a core bypass ratio, a blade effective acoustic length, an acoustic spacing length, and an inlet-to-nacelle ratio.

Abstract: A gas turbine engine includes a turbomachine defining an engine inlet to an inlet duct, a fan duct inlet to a fan duct, and a core inlet to a core duct; a primary fan driven by the turbomachine; and a secondary fan located downstream of the primary fan within the inlet duct. The gas turbine engine defines a thrust to power airflow ratio between 3.5 and 100 and a core bypass ratio between 0.1 and 10. The thrust to power airflow ratio is a ratio of airflow through a bypass passage over the turbomachine plus airflow through the fan duct to airflow through the core duct. The core bypass ratio is a ratio of airflow through the fan duct to airflow through the core duct. The fan duct includes an exhaust nozzle having a plurality of chevrons disposed at its aft end to define an exhaust outlet.

Abstract: A gas turbine engine includes a turbomachine defining an engine inlet to an inlet duct, a fan duct inlet to a fan duct, and a core inlet to a core duct; a primary fan driven by the turbomachine; a nacelle surrounding the primary fan; and a secondary fan located downstream of the primary fan within the inlet duct. The gas turbine engine is characterized by a thrust to power airflow ratio, a core bypass ratio, a blade effective acoustic length, an acoustic spacing length, and an inlet-to-nacelle ratio.

Abstract: A gas turbine engine includes a turbomachine defining an engine inlet to an inlet duct, a fan duct inlet to a fan duct, and a core inlet to a core duct; a primary fan driven by the turbomachine; and a secondary fan located downstream of the primary fan within the inlet duct. The gas turbine engine defines a thrust to power airflow ratio between 3.5 and 100 and a core bypass ratio between 0.1 and 10. The thrust to power airflow ratio is a ratio of airflow through a bypass passage over the turbomachine plus airflow through the fan duct to airflow through the core duct. The core bypass ratio is a ratio of airflow through the fan duct to airflow through the core duct. The fan duct includes an exhaust nozzle having a plurality of chevrons disposed at its aft end to define an exhaust outlet.

Abstract: An aerosol source for an electronic vapor provision system includes a heating element; an atomizing chamber; a reservoir for holding free-flowing source liquid; and a porous wick extending from the atomizing chamber to the reservoir and comprising a heater portion in cooperation with the heating element within the atomizing chamber and at least one liquid collecting portion within the reservoir, the liquid collecting portion having a maximum cross-sectional parameter that is greater than an equivalent cross-sectional parameter of the heater portion.

Abstract: A method of manufacturing wick material for use as a liquid transport element in a vapor provision system, the method including providing at least one cotton thread; and twisting the at least one cotton thread to form the wick material, wherein the wick material diameter is controlled to meet a target diameter within a tolerance of +5%/?2.5% of the target diameter.

Abstract: A cartridge for a vapor provision system including the cartridge and a control unit, wherein the cartridge includes a housing part having a mouthpiece end and an interface end, wherein the mouthpiece end includes a vapor outlet for the cartridge and the interface end includes an interface for coupling the cartridge to a control unit; an air channel extending from an air inlet in the housing part to the vapor outlet; a reservoir within the housing part containing liquid for vaporization, wherein an end of the reservoir at the interface end of the housing part is sealed by a resilient plug, wherein the reservoir includes a dividing wall between a first reservoir region on a side of the dividing wall facing the mouth piece end of the housing part and a second reservoir region on a side of the dividing wall facing the interface end of the housing part, wherein the dividing wall includes at least one fluid communication opening to provide fluid communication between the first reservoir region and the second reserv

Abstract: A cartridge for a vapor provision system including the cartridge and a control unit, wherein the cartridge includes a housing part having a mouthpiece end and an interface end, wherein the mouthpiece end includes a vapor outlet for the cartridge and the interface end includes an interface for coupling the cartridge to a control unit; an air channel extending from an air inlet in the housing part to the vapor outlet; a reservoir within the housing part containing liquid for vaporization, wherein an end of the reservoir at the interface end of the housing part is sealed by a resilient plug, wherein the reservoir includes a dividing wall between a first reservoir region on a side of the dividing wall facing the mouth piece end of the housing part and a second reservoir region on a side of the dividing wall facing the interface end of the housing part, wherein the dividing wall includes at least one fluid communication opening to provide fluid communication between the first reservoir region and the second reserv

Abstract: An aerosol source for an electronic vapor provision system includes a heating element; an atomizing chamber; a reservoir for holding free-flowing source liquid; and a porous wick extending from the atomizing chamber to the reservoir and comprising a heater portion in cooperation with the heating element within the atomizing chamber and at least one liquid collecting portion within the reservoir, the liquid collecting portion having a maximum cross-sectional parameter that is greater than an equivalent cross-sectional parameter of the heater portion.

Abstract: An aerosol source for an electronic vapor provision system includes a heating element; an atomizing chamber; a reservoir for holding free-flowing source liquid; and a porous wick extending from the atomizing chamber to the reservoir and comprising a heater portion in cooperation with the heating element within the atomizing chamber and at least one liquid collecting portion within the reservoir, the liquid collecting portion having a maximum cross-sectional parameter that is greater than an equivalent cross-sectional parameter of the heater portion.

Abstract: The disclosure relates to a vaporizer assembly for use in a vapor provision system, wherein the vaporizer assembly includes a liquid transport element formed from cotton; and a heating element comprising a coil of resistive wire around a portion of the liquid transport element, wherein the heating element has an electrical resistance of between 1.3 ohms and 1.5 ohms.

Abstract: The present application provides for a wet gas compressor system. The wet gas compressor system may include a wet gas compressor with an inlet section. A variable cross-section nozzle may be positioned about the inlet section.

Abstract: A method and an apparatus for measuring an air flow at an airfoil surface are provided, wherein at least one pressure sensor adapted to detect an air flow associated with a rotor blade surface and a pressure transducer which converts the detected air flow into an electrical signal indicating the air flow are provided. The pressure sensor is arranged within the boundary layer of the air flow at the airfoil surface such that the boundary layer profile may be determined from the electrical signal. The air flow sensor is adapted for rotor blades of a wind turbine to assist in adjusting a pitch angle of the rotor blades.

Abstract: The present application provides for a wet gas compressor system. The wet gas compressor system may include a wet gas compressor with an inlet section. A variable cross-section nozzle may be positioned about the inlet section.

Abstract: A system and method for waste heat recovery in exhaust gas recirculation is disclosed. The system includes an engine having an intake manifold and an exhaust manifold, an exhaust conduit connected to the exhaust manifold, and a turbocharger having a turbine and a compressor, the turbine being connected to the exhaust conduit to receive a portion of the exhaust gas from the exhaust manifold. The system also includes an EGR system connected to the exhaust conduit to receive a portion of the exhaust gas, with the EGR system including an EGR conduit that is connected to the exhaust conduit to receive a portion of the exhaust gas, a heat exchanger connected to the EGR conduit and being configured to extract heat from the exhaust gas, and a waste heat recovery system connected to the heat exchanger and configured to capture the heat extracted by the heat exchanger.

Abstract: The present application provides a wind turbine system. The wind turbine system may include a number of blades, a number of wind speed sensors positioned on the blades, a controller in communication with the wind speed sensors, and one or more performance adjustment, mechanisms in communication with the controller. The controller activates the performance adjustment mechanisms in response to the wind speed sensors.

Abstract: A system and method for compressing and expanding air in a compressed air energy storage (CAES) system is disclosed. A CAES system is provided that is alternately operable in a compression mode and an expansion mode and includes therein a motor-generator unit and a drive shaft connected to the motor-generator unit that is configured to transmit rotational power to and from the motor-generator unit. The CAES system also includes at least one reversible compressor-expander unit coupled to the drive shaft and configured to selectively compress and expand air, and an air storage unit connected to the reversible compressor-expander unit and configured to store compressed air received therefrom, with the at least one reversible compressor-expander unit compressing air during the compression mode and expanding air during the expansion mode.

Abstract: A system, apparatus, and method for exhaust gas recirculation (EGR) is disclosed. The EGR apparatus includes an EGR circuit having an input configured to receive an exhaust gas from an engine exhaust port, an output configured to return the exhaust gas to an intake port of the engine, and an EGR path configured to circulate the exhaust gas between the input and the output. The EGR apparatus also includes an expansion turbine connected to the EGR circuit in the EGR path downstream of the input to receive the exhaust gas, the expansion turbine configured to expand the exhaust gas and reduce a pressure thereof. The EGR apparatus further includes an EGR compressor connected to the EGR path downstream of the expansion turbine and decoupled from the expansion turbine, the EGR compressor configured to compress the exhaust gas for circulation to the output.

Abstract: A system, apparatus, and method for exhaust gas recirculation (EGR) is disclosed. The EGR apparatus includes an EGR circuit having an input configured to receive an exhaust gas from an engine exhaust port, an output configured to return the exhaust gas to an intake port of the engine, and an EGR path configured to circulate the exhaust gas between the input and the output. The EGR apparatus also includes an EGR compressor connected to the EGR circuit in the EGR path downstream of the input and EGR compressor configured to compress the exhaust gas for circulation to the output. The EGR apparatus further includes a valve system positioned in the EGR circuit and upstream of the EGR compressor to selectively cut off a flow of the exhaust gas to the EGR compressor and selectively inject ambient air into the EGR path.

Abstract: The present application provides a wind turbine system. The wind turbine system may include a number of blades, a number of wind speed sensors positioned on the blades, a controller in communication with the wind speed sensors, and one or more performance adjustment, mechanisms in communication with the controller. The controller activates the performance adjustment mechanisms in response to the wind speed sensors.