| Citation: | YANG Feng, WANG Xin, LIU Dejun, et al. Thermal internal pressure test method of casing based on gas-liquid loading[J]. Journal of Aerospace Power, 2023, 38（3）：535-545 doi: 10.13224/j.cnki.jasp.20220721
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A thermal internal pressure test method based on gas-liquid loading was designed for the load-bearing test of aero-engine casing under temperature and internal pressure load. The gas-liquid loading device can decouple temperature and pressure loading. This device used high-temperature oil as the heating medium to heat up aero-engine casing through an electric heater with the same shape as the aero-engine casing. The pressure loading system used a high-pressure air source to pressurize the cavity of the device to achieve internal pressure loading on aero-engine casing. Quantitative control of pressure load was guided by theoretical analysis of pressure model. Tests showed that the method can effectively control the temperature and pressure loading accurately. While avoiding the difficulty of using hydraulic loading method to achieve high temperature loading, this method solved the problem of poor temperature uniformity in the test using air-pressure loading method. This method also effectively avoided the blasting phenomenon if the air-pressure loading method applied to the destruction test. Results showed that the test method based on the gas-liquid loading method can be effectively applied to the thermal internal pressure test of aero-engine casing. The control accuracy of temperature load was better than ±3 K. The pressure loading process can be quantitatively controlled.
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