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针对航空发动机热端部件的材料特性和工作环境特点,自主研制了带有补偿加热装置的高温、高压接触热导(TCC)测试系统。设计使用纯铜作为热流计材料,使其对于热导率不明确或随温度变化较大的高温合金同样具有较好的适用性。针对航空发动机热端部件常用结构材料GH4169/GH4169在不同界面压力(60～180MPa)和不同界面温度(150～500℃)下的接触热导进行了试验研究。研究结果表明采用该系统进行高温、高压条件下的接触热导试验研究是可行的,利用该测试系统得到了GH4169间的接触热导的变化规律,并分析比较了有、无补偿加热装置条件下的接触热导变化情况。
Aiming at the characteristics of materials and working environment of the hot end components of aeroengine, a high temperature and high pressure contact thermal conductance (TCC) test system with compensation heating device was developed independently. The design of pure copper as a heat flow meter material makes it equally suitable for superalloys with poor thermal conductivity or with large temperature changes. Aiming at the heat conduction of GH4169 / GH4169, a common structural material for the hot end components of aeroengine, under different interface pressure (60 ~ 180MPa) and different interface temperature (150 ~ 500 ℃) The results show that it is feasible to study the contact thermal conductance under high temperature and high pressure using this system. The change rule of the contact thermal conductance between GH4169 is obtained by using this system. The thermal conductivity of GH4169 with and without compensating device The contact thermal conductivity changes.