Study On Thermal Properties Of Metallic Honey-comb Constructure On Aerodynamic Heating Condition

Metallic honeycomb thermal-protect structure are widely used in aerospacethermal protection areas, particularly widely used in thermal protection of re-typecarrier, because of its light weight, good insulate-thermal properties, saving advantagesof materials, etc. So studying the heat transfer mechanism of honeycomb structure hasvery important significance for design of the thermal design metallic thermal protectionsystem.Based on domestic and foreign researches about the heat transfer characteristics ofmetal honeycomb, this paper established a thermal radiation coupled heat conductionmetal mode to calculate honeycomb structure’s heat transfer on the basis of the MonteCarlo method and thermal network method. Analyzing the non-balance transient heattransfer characteristics of honeycomb structure on the condition of aerodynamic heating;Exploring the heat transfer characteristics of double honeycomb-structure plate;Studying the heat transfer characteristics of three-dimensional sphere-cylinderconfiguration which coated honeycomb structure combine with the engineeringalgorithm of aerodynamic heat. The main work includes:(1) Establishing a heat transfer calculational model of hexagonal honeycombstructure plate.Establishing a thermal radiation coupled heat conduction metal mode to calculatehoneycomb structure’s heat transfer on the basis of the Monte Carlo method and thermalnetwork method; Proving the thermal radiation model for the established by the MonteCarlo method and the coupling method established by the thermal network model.Calculating the hexagonal honeycomb plate’s transient temperature response on thecondition of a constant and a transient high-temperature aerodynamic heating, and thecalculation results verified the conclusions of previous literature has been.(2) Studying the heat transfer characteristics of single-layer honeycomb plate.Establishing rectangular, triangular, cylindrical honeycombs’ coupled heat transfermodel by the same method of hexagonal honeycomb’s; By means of calculating severalhoneycomb structures have different shape on same condition, analyzing their heattransfer characteristics; Researching how the porosity of porous structure affected itsheat transfer characteristics.(3) Establishing a heat transfer calculational model of two-layer honeycombstructure plate and researching its heat transfer characteristics.Assembling two single-layer honeycomb tablet to a two-layer honeycomb tablet,linking them each other by use of space-interpolation method, therefore establishing a thermal radiation coupled heat conduction metal mode to calculate two-layerhoneycomb structure’s heat transfer. Calculating the two-layer and single-layerhoneycomb tablets’ temperature response on the condition of aerodynamic heating,comparing their heat transfer characteristic, analyzing the two-layer honeycombstructure’s advantages; And by calculating some different two-layer honeycombassembly’s temperature response on the condition of aerodynamic heating, researchingoptimized design of two-layer honeycomb structure.(4) Exploring the three-dimensional heat transfer characteristics of metalhoneycomb structure.Using mapping method, establishing a three-dimensional sphere-cylinder heattransfer model which costed honeycomb by coordinate transformation, and proving themodel. Using the engineering algorithms of hypersonic aerodynamic heat, simulatedthree-dimensional sphere-cylinder vertebral ball flying at hypersonic aerodynamic heat,explore the heat transfer characteristics of three-dimensional configuration which coatedhoneycomb structure in the circumstance of hypersonic flighting.