A numerical study is made of the thermal characteristics of semitransparent materials exposed to simultaneous conduction and radiation between concentric cylinders. For extremely high-temperature applications, where radiative transfer plays an important role, ceramic-matrix composites, considered as semitransparent materials, are being explored for potential use in turbine and compressor components, spacecraft structures, engine control systems and nuclear reactors. Through the use of a gray model and the two-flux method, specialized equations are developed that generate a system of nonlinear ordinary differential equations. To facilitate the solution of this system, an iterative strategy is adopted. In order to demonstrate the versatility and accuracy of the proposed methodology, the results of several numerical experiments are presented and compared with benchmark solutions.

Issue Section:
Gas Turbines: Ceramics
Topics:
Ceramic composites, Cylinders, Heat conduction, Radiation (Physics), Temperature profiles, Ceramics, Composite materials, Compressors, Control systems, Differential equations, Engines, High temperature, Nuclear reactors, Radiative heat transfer, Space vehicles, Turbines
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