Abstract:The aircraft ground deicing system is an important equipment to ensure civil aviation safety in snow weather. The heating tube is crucial component in this system. Double spiral trapezoidal grooved tube is proposed in order to improve heating efficiency of high viscosity deicing fluid. The groove depth (h), upper base width (m) and base angle (θ) were selected as structural characteristic parameters to establish the mathematical model of special tube. Polynomial function was adopted to construct response surface approximate model. The influences of structural parameters were analyzed on Nusselt number, flow resistance coefficient and the comprehensive evaluation index. The non-dominant sorting genetic algorithm II was employed in multi-objective optimization of special tube. The structural parameters of special tube were calculated by the Pareto solution set. The result indicates that Nusselt number improves 78.7% and the comprehensive evaluation index improves 60%~62% when h∈[1.06,1.08], m∈[0.17,0.33], θ∈[84.06,84.75]. The optimized special tube effectively achieves the rapid heating of deicing fluid,JP which is significant to promote the punctuality rate of flight in winter.