It mainly arranges and analyzes the measured and back calculated data, calculates the interface heat flow and interface heat transfer coefficient through the measured temperature data, and analyzes the variation law. (1) The measured data were collected and processed into a form that can be calculated by MATLAB back...
At present, the research on the inverse calculation of interfacial heat conduction in sand mold casting process mainly focuses on the metal mold casting process, while the more widely used sand mold casting process is lack of systematic and in-depth research. The research on the cross-sectional heat transfer coefficient...
In the process of metal solidification, the interfacial heat transfer coefficient is affected by many factors, such as sand casting and mold material, sand mold casting structure, sand mold casting process and so on. Due to the complexity of sand mold casting / mold interface, it is impossible to...
The study of interfacial heat transfer coefficient in China is relatively late. Inspired by foreign scholars, Hao Weiwei, Chen Jiayu and Liu Baicheng of Tsinghua University began to study it for the first time in 1988. They mainly study the inverse calculation of heat conduction in the solidification process,...
Since the 1950s, casting engineers have found that the interfacial heat transfer coefficient has a great influence on the change of temperature field during metal solidification, which affects the final microstructure and properties of sand mold castings. Since the late 1970s, computer simulation technology has been applied to the...
Sand mold casting is a process of pouring high-temperature liquid metal into the mold cavity, cooling and solidification into rough parts. Sand mold casting industry plays an important role in the national manufacturing industry. It is an important industry related to the national economic development. It is widely used...
The change of interfacial heat transfer coefficient with time obtained by back calculation can only be used to determine the relative influence of different parameters on the behavior of interfacial heat transfer coefficient, which is not intuitive enough to reflect the change of interfacial heat transfer coefficient with the...
After the interface heat flow and temperature field data are solved by the inverse calculation program, the part of the inverse calculation program to solve the interface heat transfer coefficient is carried out, and the variation curve of the interface heat transfer coefficient with time is inversely calculated. As...
It is inevitable that there are errors in the experiment of heat exchange and temperature measurement in sand mold casting. The main sources of errors include the errors caused by temperature, the errors caused by thermocouple delay effect (sensitivity), the installation position deviation of thermocouple and the error of...
The thermophysical parameters used in numerical simulation of solidification process of sand castings mainly include specific heat CP, latent heat l and thermal conductivity of sand castings and mold materials λ， And density ρ。 Among them except ρ Can be roughly regarded as constants, CP, l λ All change...