Simulation calculation method for aerodynamic performance of automobile wind protecting cover

Abstract

The invention discloses a simulation calculation method for an aerodynamic performance of an automobile wind protecting cover. The simulation calculation method for the aerodynamic performance of the automobile wind protecting cover comprises a first step of building a physical model of the fan wind protecting cover; a second step of carrying out calculation region setting and grid division; a third step of setting border conditions; a fourth step of carrying out simulation calculation on the aerodynamic performance of the wind protecting cover in the presence of a given rotating speed of the fan by utilizing CFD simulation software Fluent; and a fifth step of optimizing a wind protecting ring structure based on a vortex dynamic theory and characteristics of a flow field around vanes, and benchmarking with experimental data to verify accuracy of the model. By post-processing a simulation calculation result and utilizing the vortex dynamic theory and the characteristics of flow lines around the fan, the structure of the wind protecting cover is optimized, and the performance of the fan wind protecting cover is accordingly improved.

Description

technical field [0001] The invention relates to a method for simulating and calculating the aerodynamic performance of an automobile windshield, in particular to a simulation calculation for an automobile windshield assembly adapted to use with an annular fan. Background technique [0002] A large amount of heat is generated during the operation of the automobile engine, which increases the temperature of the various components in the engine and reduces the working efficiency of the engine. Long-term overheating increases the risk of damage to parts and shortens the service life of the engine. The modern engine heat dissipation system is based on the heat dissipation of the water tank, and is equipped with a cooling fan to achieve a better heat dissipation effect. Improving the working efficiency of the cooling fan can remove more heat dissipation with lower energy consumption. The research on high-efficiency fans has always been a focus in the field of engine heat dissipati...

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Problems solved by technology

[0004] The traditional windshield design method needs to obtain data through a large number of experiments, the research cycle is long, and the cost investment is relatively high. At present, the development of commercial fluid simulation software is very mature, and the accuracy of simulation results has also been greatly improved. Therefore, through numerical calculation It is of great significance to conduct research on automobile windshields

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