METHOD AND SYSTEM FOR DETERMINING DISTRIBUTION OF TEMPERATURE AND VELOCITY IN A GAS TURBINE ENGINE

摘要

Techniques for determining temperature and velocity in a space inside a gas turbine engine (100) include mounting acoustic sensors (150) in the engine. The sensors are mounted to detect acoustic signals in a space (108) of fluid flow without extending into the space. A first sensor (350a) is displaced a first distance (351) from a different second sensor (350b) in a first direction parallel to fluid flow through the space. First and second signals are detected at the first and second sensors, respectively. A travel time difference between the first and the second sensors is determined by control system (170) module (180) based on the first and second signals. Velocity of fluid flow in the space is determined by the module based on the travel time difference. Temperature of fluid flow in the space is determined by the module based on either the first or the second signals or both.

主权项

1. A system comprising:
a gas turbine engine comprising a plurality of stators and rotors, each stator comprising a plurality of stator vanes and each rotor comprising a plurality of rotor blades, each rotor configured to rotate about a shaft assembly that comprises an axial shaft rigidly connected to each rotor and configured to rotate around a long axis of the axial shaft; a plurality of acoustic sensors mounted to detect acoustic signals in a space of gas flow in the gas turbine engine without extending into the space, wherein a first acoustic sensor of the plurality of acoustic sensors is displaced a first distance from a different second acoustic sensor of the plurality of acoustic sensors in a first direction parallel to a direction of fluid flow through the space; and a processor in electrical communication with the plurality of acoustic sensors, the processor configured to perform at least the steps of: detecting a first acoustic signal at the first acoustic sensor and a second acoustic signal at the second acoustic sensor; determining a first travel time difference between the first acoustic sensor and the second acoustic sensor based on the first acoustic signal and the second acoustic signal; determining a velocity of fluid flow in the space based at least in part on the first travel time difference; and determining a temperature of fluid flow in the space based at least in part on either the first acoustic signal or the second acoustic signal or both.