Abstract: In order to investigate the heat transfer process of silicone resin coated carbon fiber fabric under high temperature heat flow ablation, a three-dimensional geometric model of coated fabric was established according to the structural parameters of the coating fabric and the interlacing of carbon fiber. Based on the ablation mechanism of silicone resin and carbon fiber yarn, a numerical model of the ablation process of silicone resin coated carbon fiber fabric was created to simulate the heat transfer process of coated fabric.

The results show that compared with the microscope image, the three-dimensional geometric model of the coated fabric reflects its geometric structure well. The numerical simulation results can visually show the temperature distribution on the coated fabric at different time points. The model was verified by quartz lamp ablation test. The experimental data were in agreement with the numerical data, it’s because that to calculate the average relative error within 135 s, firstly calculate the relative error per 1 s, and finally take the average value, which is 9.47%. Therefore, the numerical model for the coated fabric is able to represent the heat transfer process of the coated carbon fiber fabrics.

Key words: coated fabric; three-dimensional geometric model; numerical simulation; carbon fiber fabric