Numerical aspects of Mach reflection simulation for the unsteady flow over a compression ramp


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The paper presents the numerical results of the verification calculations of the flow around a compression ramp with a surface inclination angle in the range from 20 deg to 49 deg by an air or argon flow. University of Toronto shock tube experimental data [Deschambault R.L. and all Glass I.I. An update on non-stationary oblique shock-wave reflections: actual isopycnics and numerical experi-ments // Journal of Fluid Mechanics. 1983. Vol. 131, pp.27-57] were used as initial data for numerical simulation. The complex Mach and double Mach reflection computational data comparison was performed under conditions different numerical models using. The different numerical schemes features effect shock wave structures receiving was estimated.

incident shock wave, reflected shock wave, Mach step, contact discontinuity, regular reflection, Mach reflection, arbitrary discontinuity decay, limiter, approximation order

DOI: http://doi.org/10.33257/PhChGD.26.8.1238


Volume 26, issue 8, 2025 year


Численные аспекты моделирования маховского отражения при нестационарном обтекании угла сжатия

В рамках данной работы представлены результаты верификационных расчетов обтекания угла сжатия с углом наклона поверхности в диапазоне от 20…49 градусов потоком воздуха или аргона. Для численного моделирования были выбраны исходные данные, соответствующие циклу стендовых экспериментов, выполненных на ударной трубе университета Торонто [Deschambault R.L. and all Glass I.I. JFM, 1983]. Выполнено сравнение расчетных данных для случаев переходного и двойного маховских отражений, полученных с применением различных численных моделей. Дана оценка влияния различных элементов использованных численных схем на точность воспроизведения наблюдаемых в эксперименте газодинамических структур.

падающая ударная волна, отраженная ударная волна, ножка Маха, контактный разрыв, регулярное отражение, маховское отражение, распад произвольного разрыва, лимитер, порядок аппроксимации

DOI: http://doi.org/10.33257/PhChGD.26.8.1238


Volume 26, issue 8, 2025 year



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