燃气舵表面 ZrO 2涂层热结构耦合分析

摘要

基于流体计算软件FLUENT和有限元分析软件ANSYS对燃气舵表面ZrO2涂层进行了热结构耦合的分析，主要对不同厚度（0.5 mm，1.0 mm和1.5 mm） ZrO2涂层表面的瞬态温度及其引起的相变和热应力进行了研究。结果表明，ZrO2涂层的厚度增加后应力值增大导致超过其屈服强度以及ZrO2涂层温度达到相变温度引发相变是其失效的主要原因；燃气舵的失效与ZrO2涂层的失效密切相关。计算结果对探究“消熔舵”技术中ZrO2涂层及燃气舵的失效行为有一定的指导意义。%Coupled thermal and structural analysis of gas vane with plasma-sprayed ZrO2 coating was investigated based on computational fluid dynamics (CFD)numerical simulation software FLUENT and finite element method (FEM)analysis software ANSYS.Phase transfor-mation and thermal stress along with the transient temperature of ZrO 2 coating with different coating thickness (0.5 mm, 1.0 mm and 1.5 mm, respectively) were mainly discussed.The results show that the stress of ZrO2 coating increases with increasing the thickness of ZrO2coating, when it reaches the yield point would lead to failure of ZrO 2 coating.Simultaneously, reaching the phase transition tempera-ture is as well an important factor for failure of ZrO 2 coating.Failure of gas vane is closely related to failure of ZrO 2 coating.The result is of certain guiding significance to explore failure of ZrO 2 coating and gas vane in “melting vane” technique .