A coupling simulation design method of engine water jacket and body temperature field

Abstract

The invention relates to a design method for coupled simulation of an engine water jacket and a bulk temperature field. The method comprises the steps that (1) assembly models of an engine cylinder body, a cylinder pad, a cylinder cover, a gas valve, a race and a duct are collected; (2) geometric models are grouped; (3) grid division is carried out to the geometric models, so that grid models can be obtained; (4) relevant boundary conditions are collected; (5) the boundary conditions obtained at the step (4) are applied to the grid models obtained at the step (3), and then direct fluid-structure coupling computation is carried out; and (6) a heat exchange boundary of the engine water jacket and the bulk temperature field can be obtained according to coupling computation results. According to the invention, the engine water jacket is directly coupled with a bulk, so that the temperature field can be computed; influences of a wall face temperature can be considered during simulation of a water jacket flow field; and the bulk temperature field can be also obtained synchronously, so that a cooling capability of the water jacket can be directly evaluated. A computation method for the water jacket becomes more accurate; and evaluation indexes for water jacket design are also confirmed.

Description

technical field [0001] The invention relates to the technical field of automobile engine development, in particular to a coupling simulation design method for an engine water jacket and a body temperature field. Background technique [0002] At present, engine supercharging technology and direct injection technology have been widely used, and the trend of engine miniaturization and light weight is obvious. With the improvement of engine performance, its combustion heat load level is getting higher and higher. Therefore, the cooling capacity of the engine water jacket on the body And the temperature field level of the body has become a key factor in the engine development process, affecting the performance and reliability of the engine. The engine water jacket and engine body are directly coupled to calculate the temperature field. Not only can the influence of wall temperature be considered when simulating the water jacket flow field, but also the body temperature field can ...

AI Technical Summary

Problems solved by technology

The current method requires multiple rounds of mutual mapping of boundaries to obtain accurate results. The calculation is cumbersome and the cycle is long, which is not conducive to the design and optimization of water jackets.

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