Implications of engine deterioration for creep life

M. Naeem, R. Singh and D. Probert

Applied Energy, 1998, vol. 60, issue 4, 183-223

Abstract: World developments have led the armed forces of many countries to become more aware of how their increasingly-stringent financial budgets are spent. One major expenditure for military authorities is upon aero-engines. Deterioration of an engine generally results in a lower specific thrust and higher specific fuel-consumption for the same spool speeds and turbine-entry temperatures. In order to meet the thrust requirement for the same aircraft's performance, the engines are run at higher spool speeds and/or turbine-entry temperatures. This results in greater rates of fuel consumption, and a shorter life (due to the greater creep damage and low-cycle fatigue incurred). Possessing a better knowledge, of the impacts of engine deterioration on an aircraft's operational performance as well as its fuel and residual life-expectancy, helps the users to improve engine utilization.

Date: 1998
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