GAS TURBINE GAP ASSESSMENT DEVICE AND GAS TURBINE SYSTEM

摘要

Provided is a gas turbine gap assessment device that is able to accurately assess the clearance between a rotating body and a stationary body without embedding a clearance sensor or with minimal installation even though a clearance sensor is embedded. Provided are: a sensor signal from a sensor provided to a gas turbine (1) formed by a rotating part and a non-rotating part; a boundary condition calculation means (15b) in the gap assessment device (15), which assesses the gap between the rotating part and the non-rotating part, that converts the sensor signal and operating data into the boundary conditions of a numerical analysis model on the basis of the gas turbine operating data; and a numerical analysis means that uses the boundary conditions calculated by the boundary condition calculation means and that is formed from a finite element numerical analysis model (15c1), which calculates physical values of the gas turbine, and a gap numerical analysis model (15c2), which calculates the gap value between the rotating part and the non-rotating part on the basis of physical values calculated by the finite element numerical analysis model.