| Citation: | CHENG M H，LI W G，WANG Z. Identification method of ablation performance parameters of carbonized materials[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（4）：1384-1391 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0474
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In response to the difficulty in measuring the ablation performance parameters of thermal protection materials, this paper studies the identification method of ablation performance parameters based on optimization algorithms. The one-dimensional continuous model is used to describe the internal thermal response of carbonization ablation thermal protective materials. Compared with the public experimental data, the calculation error of each measurement point is less than 15%. The basis function characterisation approach uses the Chebyshev polynomial as the basis function to characterize the material’s specific heat capacity and thermal conductivity both before and after carbonization. According to the temperature test experimental data of PICA materials in the public literature, the pyrolysis kinetic parameters of the materials and the undetermined coefficients of the basis function are identified by genetic algorithm, and the parameter identification results are substituted into the one-dimensional continuous model for calculation. Compared with the experimental data in the public literature, the average relative error of the temperature curves under the two verification conditions is less than 10%.
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