Optimization of deflector plate structure parameters for hot air circulation heating machine of asphalt pavement
LIU Zeyuan
ZHANG Hongli
ZHANG Qingmei
WANG Yiqing
Abstract：In order to improve the efficiency of hot air circulation heating for asphalt pavement,this study focuses on the deflector plate in hot air circulation heating machines.Using finite difference method and Taylor series expansion,a numerical solution for jet impingement heat transfer is developed,a fluid-solid coupling heat transfer model for asphalt pavement is established.Finite element software FLUENT is employed to simulate and analyze the heat transfer field of hot air jet impingement,investigate the influence of inner inclination angles(45°,50°,55°,60°,65°,70°)and outer inclination angles(30°,35°,40°,45°,50°)of the deflector plate on heating efficiency.Orthogonal experimental design is used to design 30 sets of experimental schemes.Temperature field distributions of asphalt pavement under different inner and outer inclination angles are obtained.The hot air circulation heating duration for specific temperature targets is calculated and the structural parameters of the deflector plate in hot air circulation heating machines are determined.Results show that when the inner or outer deflector plate inclination angle remains constant,heating efficiency first decreases and then increases as the outer or inner deflector plate inclination angle increase.The higher heating efficiency of hot air circulation heating asphalt pavement is achieved when the inner and outer deflector plate inclination angles are 60° and 40° respectively.
Keywords：hot air circulation heatingdeflector plateinclination anglefluid-structure couplingheating efficiency
Publication Date：2025-03-29
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 90-99 )