Thermal resistance equivalent correction method based on uncertain parameters of boundary heat source heat transfer model

Abstract

The invention provides a thermal resistance equivalent correction method based on uncertain parameters of a boundary heat source heat transfer model. The method is based on the constant physical property of thermal resistance in a temperature range and enough temperature uniformity. A heat transfer model is regarded as a thermal resistance network structure for simplified analysis; according to agroup of temperature measurement information located on a participation surface, equivalent correction of the total thermal resistance between two temperature surfaces is performed by adjusting the thermal resistance of a certain area in a heat flow path so as to obtain the real heat transfer rate, and the adjustment method comprises the steps of modifying the heat conduction coefficient of a heattransfer material, directly correcting the thermal resistance value and increasing and decreasing the thermal resistance structure. The method can effectively replace unknown heat conduction parameters such as materials, gaps and contacts and surface-to-surface radiation with complex structures, effectively improves the precision of the model, and greatly reduces the calculation amount caused bysurface-to-surface radiation operation.

Description

technical field [0001] The invention relates to the field of heat transfer simulation analysis. In particular, it relates to an equivalent correction method of thermal resistance based on the uncertain parameters of the heat transfer model of the boundary heat source. Background technique [0002] Heat transfer refers to the energy transfer caused by temperature difference, also known as heat transfer. The heat transfer process of objects is divided into three basic heat transfer modes, namely: heat conduction, heat convection, and radiation. Heat transfer analysis is widely used in modern engineering applications. The finite element model analysis is one of the most important methods in heat transfer analysis. Construct a finite element model based on the data obtained from the experimental device and a small number of prototype tests, and conduct analysis and research such as structural optimization, application simulation, and result prediction, thereby replacing those ...

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Problems solved by technology

[0003]However, for complex heat transfer structures, establishing accurate finite element models is an important current challenge

A large number of characteristic structures will bring a huge amount of calculation, and the many variables brought by the complex structure make it difficult for the finite element model to obtain accurate calculation results

In addition, for high-precision research objects, the contact mode, pores and inaccurate material parameters between components will have a huge impact on the calculation results

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