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首页> 外文期刊>Journal of turbomachinery >Three-Dimensional Numerical Analysis of Curved Transpiration Cooled Plates and Homogenization of Their Aerothermal Properties
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Three-Dimensional Numerical Analysis of Curved Transpiration Cooled Plates and Homogenization of Their Aerothermal Properties

机译：弯曲蒸腾冷却板的三维数值分析及其均热性能

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摘要

Three different designs of a transpiration cooled multilayer plate-plane, convex, and concave-are analyzed numerically by application of a 3D conjugate fluid flow and heat transfer solver. The geometrical setup and the fluid flow conditions are derived from modern gas turbine components. The conjugate analysis of these designs focus on the influence of the surface curvature, the cooling film development on the plate surface, the fluid structure in the cooling channels, and on the cooling efficiency of the plate. Moreover, to predict the effective thermal properties and the permeability of these multilayer plates, a multiscale approach based on the homogenization technique is employed. This method allows the calculation of effective equivalent properties either for each layer or for the multilayer of superalloy, bondcoat, and thermal barrier coating (TBC). Permeabilities of the different designs are presented in detail for the TBC layer. The influence of the plate curvature and the blowing ratio on the effective orthotropic thermal conductivities is finally outlined.
机译：通过使用3D共轭流体流动和传热求解器，对蒸发冷却的多层板平面，凸面和凹面的三种不同设计进行了数值分析。几何设置和流体流动条件源自现代燃气轮机组件。这些设计的共轭分析着重于表面曲率，板表面上的冷却膜显影，冷却通道中的流体结构以及板的冷却效率的影响。此外，为了预测这些多层板的有效热性能和渗透性，采用了基于均质技术的多尺度方法。这种方法允许计算每一层或超级合金，粘结层和热障涂层（TBC）多层的有效等效性能。对于TBC层，详细介绍了不同设计的磁导率。最后概述了板曲率和吹塑比对正交各向异性有效热导率的影响。

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