GAS TURBINE GAP ASSESSMENT DEVICE AND GAS TURBINE SYSTEM

摘要

Disclosed is a gas turbine gap assessment device which can assess the clearance of a rotary body and a stationary body precisely, and which does not have a clearance sensor embedded therein, or even if a clearance sensor is embedded therein the installation is minimal. A gap assessment device (15) for assessing a gap between a rotary component and a non-rotary component in accordance with a sensor signal produced by a sensor disposed in a gas turbine (1) comprising the rotary component and the non-rotary component, and in accordance with operation information of the gas turbine, wherein the gap assessment device (15) is provided with: a boundary condition calculation means (15b) for converting the sensor signal and the operation information to a boundary condition for a numerical analysis model; and a numerical analysis means comprising a finite element method numerical analysis model (15c1) for calculating a physical quantity of the gas turbine by using the boundary condition calculated by the boundary condition calculation means, and comprising a gap numerical analysis model (15c2) for calculating a value for the gap between the rotary component and the non-rotary component on the basis of the physical quantity calculated by the finite element method numerical analysis model.