热障涂层隔热效果试验研究

在试验器上完成隔热效果试验是评价热障涂层(Thermal Barrier Coating,TBC)降温效果的常规手段,而在发动机上难以直接测试和分析热障涂层的隔热效果.结合TBC隔热效果试验结果,提出了1种从低温模拟试验结果得到发动机设计状态TBC实际隔热效果的换算分析方法.分析模型着重考虑了对流换热和辐射换热导致的隔热效果变化,完成了涡轮导向叶片和转子叶片在不同试验温度下的涂层隔热效果试验,对试验结果的分析表明:试验结果和计算结果差异明显.该方法具有一定的工程应用价值.

Experimental Study of Insulating Effectiveness for Thermal

It is common method for evaluating the TBC by using the insulating effectiveness experiment, but it is difficult to directly test and analyze the insulating effectiveness of TBC on the engine. A calculation analysis method was proposed with the insulating effectiveness of TBC testing results, which obtained TBC actual insulating effectiveness on engine design state from the low temperature simulation results. The insulating effectiveness change was considered by the convection and radiation heat transfer. The coating insulating effectiveness experiment of turbine vane and rotor blade was completed in the different experimental temperature. The analysis shows that the experimental result is different from the calculation result. The method has engineering application value.