A testing method for aeroengine casings under high-temperature aerodynamic fatigue loads

The high-temperature aerodynamic fatigue load test for aeroengine casings evaluates the casing's high-temperature fatigue pressure strength under repeated engine start-stop cycles. This assessment is critical for determining the fatigue life and overall reliability of aeroengines. To enable ground-based high-temperature aerodynamic fatigue testing, a mathematical model simulating the test conditions for a composite aeroengine casing was established. The numerical results show strong agreement with the experimental data. In addition, the sensitivity of the pressurization and heating system's design parameters in the test system was analyzed. The interaction between temperature and pressure during fatigue testing was investigated, and the impact of air leakage on load control during fatigue loading was evaluated. Key findings indicate that pressure variations significantly influence the temperature control, whereas temperature variations have a minimal effect on pressure control. Accurate fatigue load regulation can be attained through optimized thermal/pressure system design and proper selection of control parameters.