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US 7,621,716 B2Granted
Turbine case cooling
AssigneeROLLS-ROYCE plc
InventorShane Regunath
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Abstract
A method of controlling turbine case cooling in a gas turbine engine, the method including monitoring the present state of the engine 32 and using a predictive model based system 44, 46 to predict the future thermal expansion of the turbine case 12 and turbine blades 28, and controlling cooling of the turbine case 12 in response to said prediction to provide a required gap 30 over time.
Claims8
A method of controlling turbine case cooling in a gas turbine engine, the method comprising:
- monitoring a present running state of the engine;
- estimating with a thermal expansion model expected thermal expansion of the turbine case and turbine blades;
- and controlling cooling of the turbine case in response to said expected thermal expansion to provide a required gap between the turbine case and the turbine blades over time;
- wherein each estimation of expected thermal expansion includes estimating multiple consecutive expected thermal expansion values of the turbine case and turbine blades over a finite period of time.
1 more element
Dependencies are inferred from the claim text.