Gas Turbines

Xi’s expert simulation and measurement capabilities allow us to help clients with the measurement and modelling of gas turbine designs for condition monitoring purposes as well as perform fatigue and life cycle analysis. Xi use physical measurement and multiphysics simulation to look at the performance of a turbine design and estimate likely failure modes and design improvements.

Numerical simulations help design and optimise the performance of gas turbines.  These simulations can examine individual components such as blades in a gas turbine or be full system overviews where the hydrodynamics lift on the blades of a tidal turbine are integrated with the drivetrain dynamics and structural dynamics of the support structures to identify fatigue failure risk.   Turbines by their nature are multicomponent devices often affected by the different physical processes such as electromagnetics, aerodynamics, hydrodynamics and thermal diffusion.  Simulating their behaviour often therefore requires a multiphysics approach.  Xi also provide onsite measurement which can be used to validate and give confidence to our simulations.

Xi use multibody dynamics to efficiently model drivetrains in turbines.   The multibody dynamics approach allows the simulation of mixed systems of flexible and rigid bodies, where each body may be the subject of large rotational or translational displacements.  In cases where the drivetrain design is locked and the support structures are designed, a simulation approximating the drivetrain with a beam rotor approach can be used to rapidly optimise the support and isolation elements.   In situations where the rotational velocity is high, such as in gas turbines, the centrifugal forces can change the effective stiffness of blade; a modelling approach can be used to determine the corollary change in the resonant frequency of blades and avoid frequency matching and failure. Xi also provide models of the effect of thermal stresses on turbine components.

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