Thermal-mechanical Coupling Analysis Of Active Heat Transfer Wall Plate With Lightweight Lattice Truss Cores

Heat dissipation problem of the high temperature structure has always been aproblem of common concern to engineering, especially in the field of aerospace, with anew generation of spacecraft toward faster, more lightweight direction of theprogressive development, the load of the aircraft in service environments become morecomplex, more severe. Therefore, the structure design which put forward higherrequirements, requires both structure has a good heat dissipation performance to ensurethat will not be ablated at high temperatures, and to make it to satisfy certain strengthstiffness to realize the load function. In order to explore simultaneously to satisfy therequirement of heat dissipation, carrying and lightweight structure, this paper proposes anew type of active heat transfer wall plate structure with lattice truss cores that is tointegrate the cooling channel into lattice sandwich panel structure of the sandwich panel,makes it can give full play to the lattice structure of lightweight, high specific stiffness,high strength and other advantages, and can well realize flow heat transfer performanceof the cooling channels. As a result, the structure is an ideal heat transfer structure, theneed to study it the following several aspects:First of all, using Ansys-workbench software platform for active heat transfer wallplate structure with lattice truss cores and the structure of the traditional way to groovetype cooling heat transfer performance and thermal coupling performance is simulated.Structure of the lightest weight, the lowest temperature, stress and the lowest pumppower as the measure, respectively, of the cooling medium flow rate, cooling channelcross-sectional area and the thickness of the plate has carried on the preliminaryoptimization design.Secondly, the design of the internal strips and lattice topology configurationstructure of active heat transfer wall plate structure with lattice truss cores, studied thetemperature field under constant heat load both structures. Sequential coupling methodis used to solve the structure of the thermal-mechanical coupling problem, to redefinethe structure properties of grid, the temperature load of obtained above as a structuralanalysis of "mechanical" load is applied to the whole structure, calculation when thecombination of static load and thermal load, two kinds of structure stress field anddisplacement field, by comparing the data to select the relatively optimal coolingchannel topology configurations.Then, study the heat transfer performance and thermal-mechanical coupled of thehigh temperature heat insulation board structure with double-wall of active heat transfer.To establish the structural finite element analysis model, structural materials wererespectively taken to TC4titanium alloy and304stainless steel, to the heat load for a single variable, evaluation of the two different material of the structure of the heattransfer performance. Sequential coupling method is adopted to obtain the stress fieldand displacement field of the structures when the combination of static load and thermalload, and eventually selected suitable high temperature structural materials.Finally, as the study object of aircraft leading edge structure with active heattransfer wall plate with lattice truss cores. To respectively establish the aircraft leadingedge structure finite element analysis model with10,20and30degrees tipangle.Considering the convective boundary conditions of the structure, to solve thestructural temperature field along with the change of heat load trend, studied in thecombination of heat load and pneumatic pressure coupled thermal-mechanicalproperties of the structures.