The objective of this paper is to simulate the conduction heat transfer through the custom built TFG for fire-certification in aero engine. The numerical results were also compared directly to the temperature readings from the two thermocouples placed under the enamelled disc. In order to investigate the effect of the non-uniform distribution of the heat flux, the author conducted a two-dimensional numerical analysis to confirm that one-dimensional conduction conditions prevailed throughout the temperature sensing section of the TFG. There was a high heat flux level directly underneath the hot plume. During the calibration of TFG using a hot air gun, the heat flux from the hot air gun was not uniform. The authors have developed a custom-built heat transfer gauge to measure the heat flux from ISO2685 fire-certification burner under isothermal wall conditions. This paper presents a numerical analysis on conduction heat transfer through a custom built thin film gauge (TFG). The method has been validated using test data from a Perspex model, where heat transfer coefficients were measured using a transient liquid crystal technique.
#PYROSIM GAUGE HEAT FLUX ON WALL CODE#
This paper presents the application of an improved method using a communication library (SC89) between the in-house finite element (FE) code SC03, and the commercial computational fluid dynamics (CFD) code FLUENT. An alternative approach using conjugate calculations can be adopted, but the computational cost and meshing difficulties in matching the fluid and solid grids makes this unaffordable in terms of analysis time. Standard methods rely on the application of boundary conditions to the wall surface, which are commonly based on empirical heat transfer coefficient correlations or approximate read across of the CFD results. Traditionally fluid and solid simulations are conducted separately or using conjugate analysis. Part of the heat shield design process was a comprehensive thermal analysis of the installation. Rolls-Royce plc was requested to come up with a suitable solution that shielded critical pipe weld locations, reducing local temperatures, so allowing a useful increase in power output from the plant. Temperature dependent material properties mean that increasing the power output in a nuclear plant may reduce the life of the welds in the pipes of the heat exchanger (boiler), operating in very demanding conditions.
#PYROSIM GAUGE HEAT FLUX ON WALL FULL#
The need for making the most profitable use of the available sources of energy requires the full exploitation of plant operational capacity. The accurate calculation of temperature distribution in key parts of a nuclear plant plays a crucial role in maximising the power output and the plant efficiency, whilst ensuring safe operation.