Multi-factor Coupled Heat Transfer Model with Multi-layer and Dynamic Heat Transfer Characteristics in Vehicle Cabin

doi:10.3901/JME.2019.06.145

Abstract

Abstract: To solve the problem of complex non-uniform dynamic heat transfer between the inner and outer layers of automotive structures, which is difficult to calculate accurately in the current researches of single-layer structure, an analysis method of multi-layer dynamic heat transfer model coupled with multi-factor in the natural environment is proposed on the basis of all-weather dynamic temperature characteristic test of automobile. Compared with the single-layer structure model, the dynamic temperature error of the multi-layer structure model is less than 10%, which has higher accuracy. The non-uniform temperature distribution and dynamic heat transfer characteristics in occupant zone are obtained in the simulation analysis, and the influences of radiation, convection and conduction on the heat absorption and heat dissipation of seats are quantitatively compared and analyzed, the analysis results show that the imbalance distribution of solar radiation is the main reason for the multiple local high temperature zones in cabin during natural exposure test. Variation regulation on dynamic heat transfer characteristics under different attributes of windows, body and seats are emphatically studied and predicted, the multi-layer heat transfer model and the research method can be used to evaluate the dynamic heat transfer characteristics in cabin, and provide a method to study the dynamic thermal load and thermal comfort of cabin for automobile design and manufacture.

Key words: forging pressure, friction torque, heat input, rotation speed, continuous drive friction welding, dynamic heat transfer, heat load, multi-factor coupling, multi-layer structure, thermal comfort

CLC Number:

U462

DENG Zhiyong, LAN Fengchong, CHEN Jiqing, ZHANG Xiaodong. Multi-factor Coupled Heat Transfer Model with Multi-layer and Dynamic Heat Transfer Characteristics in Vehicle Cabin[J]. Journal of Mechanical Engineering, 2019, 55(6): 145-155.

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