On the use of two forms of the energy conservation equation for the interpretation of experimental data from aerodynamic experiments


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The results of numerical modeling of shock-wave interaction near a surface with a generatrix break are presented for bodies of three configurations, obtained on unstructured low-dimensional tetrahedral meshes. An algorithm for numerically integrating the Navier-Stokes equations is implemented and described. This algorithm includes finite-volume discretization and the use of two alternative formulations of the energy conservation equation—the total specific energy equation and the internal energy equation. Solutions obtained using both formulations are compared, their sensitivity to mesh effects is analyzed, and the characteristics near the surface of the bodies with a generatrix break are reproduced. The results are compared with experimental data.

: nonequilibrium radiation of strong shock waves, spectral emissivity of diatomic molecules, emissivity averaged over the rotational structure of electronic-vibrational-rotational transitions.

DOI: http://doi.org/10.33257/PhChGD.26.8.1237


Volume 26, issue 8, 2025 year


Об использовании двух форм уравнения сохранения энергии для интерпретации экспериментальных данных аэродинамических экспериментов

поверхности с изломом образующей для тел трех конфигураций, полученные на неструктурированных тетраэдральных сетках малой размерности. Реализован и описан алгоритм численного интегрирования системы уравнений Навье-Стокса, включающий дискретизацию по методу конечных объемов и использование двух альтернативных формулировок уравнения сохранения энергии – уравнения полной удельной энергии и уравнения внутренней энергии. Проведено сопоставление решений, полученных при использовании обеих формулировок, анализ чувствительности к сеточным эффектам и воспроизведения характеристик вблизи поверхности исследуемых тел с изломом образующей. Проведено сравнение полученных результатов с экспериментальными данными.

двойной конус, цилиндр с юбкой, уравнения Навье-Стокса, уравнение сохранения полной удельной энергии, уравнение сохранения удельной внутренней энергии, метод конечного объема

DOI: http://doi.org/10.33257/PhChGD.26.8.1237


Volume 26, issue 8, 2025 year



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