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首页> 外文期刊>International Journal of Fluid Machinery and Systems >Lifetime Prediction of Film Cooling Systems with and without Thermal Barrier Coating
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Lifetime Prediction of Film Cooling Systems with and without Thermal Barrier Coating

机译:带有和不带有热障涂层的薄膜冷却系统的寿命预测

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The present study investigated temperature, thermal stress, and the lifetime in film cooling systems with and without thermal barrier coating. 3D-numerical simulations using a FEM commercial code were conducted to calculate distributions of temperature and thermal stresses. In the simulations, the surface boundary conditions used the surface heat transfer coefficients and adiabatic wall temperature which were converted from the Sherwood numbers and impermeable wall effectiveness obtained from previous mass transfer experiments. Then, the lifetime of the film cooling systems is predicted using thermal analysis data and the material creep data. The minimum lifetime is approximately 1,100 hours on the sides of the hot side surface in case without TBC.
机译:本研究调查了有无热障涂层的薄膜冷却系统中的温度,热应力和寿命。进行了使用FEM商业代码的3D数值模拟,以计算温度和热应力的分布。在模拟中,表面边界条件使用了表面传热系数和绝热壁温,这些系数是从先前的传质实验获得的舍伍德数和不渗透壁效率转换而来的。然后,使用热分析数据和材料蠕变数据预测薄膜冷却系统的寿命。如果没有TBC,则热侧面的最小寿命约为1100小时。

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