Category: Transient Plane Source
Author(s): R. Pitz-Paal, S. Brendelberger, S. Hotker, T. Fend, Thomas Fend
Keywords: Effective material properties, Effusion cooled combustion chamber, Fluid dynamics, Heat load, Heat Transfer, Macroscopic, Macroscopic equations, Metallic foams, Nickel alloy, porosity, Porous media, Radiation flux test, Slip-reaction-foams, Temperature, Thermal Conductivity, Transient plane source (TPS), Transient plane source (TPS) method
Abstract: This study used macroscopic equations to determine fluid dynamics and heat transport properties in metallic slip-reaction (SR)-foams for their application in gas turbines. The numerical results were validated by an experimental method that analyzed the physical and mechanical properties of the SR-foams. An apparatus measured the effective thermal conductivity of the foam samples using the transient plane source (TPS) method. Results showed that the foams had low thermal conductivities and generated a large temperature gradient that exceeded the maximum threshold, and would need further modifications before their application in gas turbines. However, the temperature profile obtained by the numerical simulation was found to be the same when compared with the experimental results, and therefore, the foam model is considered a fast and accurate way to estimate mechanical parameters in place of an experimental study.
Reference: Applied Thermal Engineering, 47 (2012) 34-40
DOI: 10.1016/j.applthermaleng.2012.03.017