Abstract:
A gas turbine engine is provided having: a turbomachine; a fan section having a fan rotatable by the turbomachine; a nacelle enclosing the fan; and an engine controller positioned within the nacelle. The nacelle defines an inner surface radius (r) along the radial direction inward of the engine controller, wherein the engine controller defines a radial height (Δr) along the radial direction, a total volume (V), and a normalized radius (r′). The normalized radius (r′) is a ratio of the inner surface radius (r) to the total volume (V) to cube root, and wherein these parameters are related by the following equation:
Abstract:
Systems and methods that include and/or leverage a neural network to approximate the steady-state performance of a turbine engine are provided. In one exemplary aspect, the neural network is trained to model a physics-based, steady-state cycle deck. When properly trained, novel input data can be input into the neural network, and as an output of the network, one or more performance indicators indicative of the steady-state performance of the turbine engine can be received. In another aspect, systems and methods for approximating the steady-state performance of a “virtual” or target turbine engine based at least in part on a reference neural network configured to approximate the steady-state performance of a “fielded” or reference turbine engine are provided.
Abstract:
A measuring device for a measurement quantity is provided. The measuring device includes, an electronic measuring unit provided and designed to capture at least one measurement signal of an ignition electrode, which is arranged at least partially in a combustion chamber of a fluid-flow machine, the measurement signal being dependent on the measurement quantity. At least one protective device is provided to protect at least the electronic measuring unit from high voltages.
Abstract:
There is disclosed an aero gas turbine engine comprising a compressor and an array of variable inlet guide vanes for the compressor. The angle of the variable inlet guide vanes is controlled by scheduling, the scheduling comprising a first component invoked for engine ground start and a second component invoked for engine in-flight windmill start at least under particular flight conditions. The angle of the variable inlet guide vanes required by at least a portion of the second component is greater than the angle of the variable inlet guide vanes required by at least a portion of the first component.
Abstract:
A method of monitoring an operating parameter of an apparatus. The method comprises taking a measurement of the operating parameter of the apparatus on multiple occasions. The mean and standard deviation of a set of threshold determining values is then determined, the threshold determining values each being dependent on at least one of the operating parameter measurements. Thereafter an event threshold, dependent on the mean and standard deviation of the set of threshold determining values is determined. The operating condition value is monitored, where the operating condition value at any given time is dependent on at least one of the operating parameter measurements. Finally an event signal is generated if the operating condition value is in a regime beyond the event threshold.
Abstract:
A turbine engine provides a spool supporting a turbine. The spool is arranged in a core nacelle and includes a thrust bearing. A fan is arranged upstream from the core nacelle and is coupled to the spool. A fan nacelle surrounds the fan and core nacelle and provides a bypass flow path that includes a fan nozzle exit area. A flow control device is adapted to effectively change the fan nozzle exit area. A controller is programmed to monitor the thrust bearing and command the flow control device in response to an undesired load on the thrust bearing. Effectively changing the fan nozzle exit area with the flow control device actively manages the bearing thrust load to desired levels.
Abstract:
Fuel is delivered in a gas turbine engine including a can annular combustor array that includes at least one combustor level subset within the array supplied by an independent fuel delivery system. Fuel is supplied only to one or more subsets during a first mode of operation. Fuel is supplied to the entire array of combustors during a second mode of operation.
Abstract:
A process quantity measurement method with which an engine output is accurately measured in a relatively simple manner. Torque of an engine is measured based on the amount of torsion of the output shaft of the engine, and an engine output is obtained based on the measured torque. On the other hand, an engine output is calculated based on input and output heat quantity, and a difference between the engine output based on the torque and the engine output based on the input and output heat quantity is obtained in advance. When the engine is operated, the previously obtained difference is added to the engine output that is based on the calculated input and output heat quantity to obtain the engine output.
Abstract:
The invention concerns a method in which oxygen and/or nitrogen is extracted from an air separation unit. The oxygen that is extracted is directed toward a gasifier, and the nitrogen that is extracted is directed toward a gas turbine. At least one parameter related to each gas stream is controlled by acting upon a compressor located within this gas stream's path, and by assigning to that gas stream a parameter, which is related to a variable setpoint value, which represents the load of the gas turbine.
Abstract:
Four actuators are instructed to move to a condition indicated by a demand line 81. Their actual conditions are indicated by four arrows. The method determines if the range 84 of actual conditions exceeds a threshold value, representing an unacceptable mismatch of actuator positions. This comparison is used to establish further demand instructions. For example, if the range is too great, and the average 82 is below the demand line 81, the devices are instructed to move to the upper extreme position at 88. If the average position 82 is above the demand line 81, the devices are instructed to move to the lower end of the range, at 90. This results in the actuator positions moving together, as they also move toward the demand line 81, reducing risks associated with actuator mismatches.