Thermal analysis of high viscosity deicing fluid in the heating system

aircraft ground deicing is a crucial certification to civil flight safety in cold winter. thermal analysis of high viscosity deicing fluid in chinese ground heating system is carried out for promoting efficiency and flight punctuality. the structure of the system is asymmetrical, which is mainly composed of combustion chamber and heat exchange tube. combustion releases energy to heat the deicing fluid in the exchange tube. firstly, because of the formidable asymmetric structure, the grids of system need to be meshed separately to analyze the distribution of combustion temperature field. secondly, due to the complex properties of deicing fluid, its main component ethylene glycol is selected as the working medium to examine the heat transfer performance. then, the variation rules of thermo-physical parameters of ethylene glycol are compared with those of ideal fluid water. the results show that the asymmetric structure leads to the temperature field shifting to the gas outlet. the central area of the combustion chamber burns more fully than the edge area. both dynamic viscosity coefficient and prandtl number of ethylene glycol demonstrate similar nonlinear relationships when heating. concerning thermal conductivity, nusselt number and convection heat transfer coefficient, the variation rules of the two fluids are approximate, but the magnitudes of ethylene glycol are obviously less than those of water. therefore, the high viscosity of fluid shows significant effect on heat transfer performance. finally, a heating experiment is conducted to verify the reliability of the simulation. the research is beneficial to further explore the basic mechanism of combustion and heat transfer in the system, which is of great theoretical significance for optimizing and improving the existing chinese deicing heating system.