A direct fluid-solid coupling heat transfer analysis method for engine cooling water jacket

Abstract

The invention discloses a direct fluid-solid coupling heat transfer analysis method for an engine cooling water jacket. The method comprises the following steps: 1, establishing a solid domain and a fluid domain parametric geometric model; 2, carrying out grid partition and grid quality inspection; 3, defining material attributes; 4, defining boundary conditions; 5, defining a coupling heat transfer interface; 6, setting solver parameters; 7, carrying out direct fluid-solid coupling heat transfer analysis considering boiling heat transfer and obtaining calculation results. The method can compensate for the inability to effectively evaluate the heat transfer process and the coolant flow condition between the solid region and the fluid region in a conventional engine cooling water jacket design process, and the method avoids the risk of cracking failure caused by the high temperature of the bridge area of the cylinder head fire surface.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine cooling systems, in particular to a direct fluid-solid coupling heat transfer analysis method for an engine cooling water jacket. Background technique [0002] The internal structure of the engine cylinder head is complex, and the working environment of the components is harsh. The fire surface of the cylinder head must withstand high temperature, high pressure and exhaust gas erosion. The flow velocity, heat conduction and convection heat transfer, and boiling heat transfer conditions in the nose bridge area of ​​the fire surface of the cover have extremely important guiding significance and practical value for improving the service life and reliability of the engine cylinder head. [0003] The temperature of the wall surface contacted by most areas of the engine cooling water jacket is low, and the heat transfer per unit area is small, that is, the heat flux density is low. T...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to make up for the inability to effectively evaluate the heat transfer process and coolant flow conditions between the solid domain and the fluid domain in the traditional engine cooling jacket design process, and propose a direct fluid-solid coupling of the engine cooling jacket considering the influence of boiling heat transfer Heat transfer analysis method, in order to effectively evaluate the cooling effect of the cooling water jacket in the conceptual design stage of the engine, so as to avoid the risk of cracking failure caused by the high temperature of the nose bridge area of ​​the cylinder head fire surface

Images