Influence of tetrahedral mesh characteristics on the accuracy of supersonic flow modeling of axisymmetric model


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The paper examines the effect of the parameters of unstructured tetrahedral meshes on the results of modeling the flow around the standard HB-2 model with a viscous thermally con-ductive gas at zero angle of attack, the Mach number is 1.5. The meshes were constructed using the free TetGen and Gmsh software packages. The simulation was based on the system of regularized (quasi-gas dynamic) equations. It was shown that using the better meshes ac-cording to a set of criteria (small size of cells on the surface of the model, low degree of une-venness, high quality of cells), the simulation results are closer to experimental data than on meshes that are the worse according to the specified criteria. In addition, with the improve-ment of the quality of the meshes, it becomes possible to simulate non-stationary flow modes.

tetrahedral mesh, mesh generators, HB-2 model, quasi-gas dynamic algorithm

DOI: http://doi.org/10.33257/PhChGD.26.1.1173


Volume 26, issue 1, 2025 year


Влияние характеристик тетраэдральных сеток на точность моделирования сверхзвукового обтекания осесимметричной модели

В работе исследуется влияние параметров неструктурированных тетраэдральных сеток на результаты моделирования обтекания стандартной модели HB-2 вязким теплопроводным газом при нулевом угле атаки, число Маха равно 1.5. Расчетные сетки строились с помощью свободно распространяемых пакетов TetGen и Gmsh. Моделирование проводилось на основе системы регуляризованных (квазигазодинамических) уравнений. Показано, что при использовании сеток, лучших по совокупности критериев (малый размер ячеек на поверхности модели, малая степень неравномерности, высокое качество ячеек), результаты моделирования ближе к экспериментальным данным, чем на сетках, худших по указанным критериям. Кроме того, при улучшении качества сеток появляется воз-можность моделирования нестационарных режимов обтекания.

тетраэдральная сетка, сеточные генераторы, модель HB-2, квазигазодинамический алго-ритм

DOI: http://doi.org/10.33257/PhChGD.26.1.1173


Volume 26, issue 1, 2025 year



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