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Аналитическое решение задачи о сходящейся ударной волне в газе в одномерном случае

Authors: Kuropatenko, V.F.; Magazov, F.G.; Shestakovskaya, E.S.;

Аналитическое решение задачи о сходящейся ударной волне в газе в одномерном случае

Abstract

В.Ф. Куропатенко1,2 , Ф.Г. Магазов2, Е.С. Шестаковская2 1 Российский федеральный ядерный центр – Всероссийский научно-исследовательский институт технической физики им. академика Е.И. Забабахина, г. Снежинск, Российская Федерация 2 Южно-Уральский государственный университет, г. Челябинск, Российская Федерация E-mail: leshest@list.ru. V.F. Kuropatenko1,2 , F.G. Magazov2, E.S. Shestakovskaya2 1 Russian Federal Nuclear Center – Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk, Russian Federation 2 South Ural State University, Chelyabinsk, Russian Federation E-mail: leshest@list.ru Построено аналитическое решение задачи о сходящейся ударной волне в сосуде с непроницаемой стенкой, описывающее случаи плоской, цилиндрической и сферической симметрии. На границе сосуда задана отрицательная скорость, а скорость холодного идеального газа равна нулю. В начальный момент времени из этой точки начнет распространяться ударная волна к центру симметрии. Граница сосуда будет двигаться по определенному закону, согласованному с движением ударной волны. В эйлеровых переменных она движется, но в лагранжевых переменных её траектория является вертикальной линией. Получены уравнения, определяющие структуру течения газа между фронтом ударной волны и границей как функции времени и лагранжевой координаты, а также зависимость энтропии от скорости ударной волны. Для всех случаев симметрии найдены показатели автомодельности и соответствующие им значения безразмерных координат для широкого диапазона показателей адиабаты. Задача решена в лагранжевых координатах и принципиально отличается от ранее известных постановок задачи о схождении автомодельной ударной волны к центру симметрии и её отражении от центра, которые построены для бесконечной области в эйлеровых координатах. The analytical solution of the problem of a convergent shock in the vessel with an impermeable wall is constructed for the cases of planar, cylindrical and spherical symmetry. The negative velocity is set at the vessel boundary. The velocity of cold ideal gas is zero. At the initial time the shock spreads from this point into the center of symmetry. The boundary moves under the particular law which conforms to the movement of the shock. In Euler variables it moves but in Lagrange variables its trajectory is a vertical line. Equations that determine the structure of the gas flow between the shock front and the boundary as a function of time and the Lagrange coordinate as well as the dependence of the entropy on the shock wave velocity are obtained. Self-similar coefficients and corresponding critical values of selfsimilar coordinates were found for a wide range of adiabatic index. Thus, the problem is solved for Lagrange coordinates. It is fundamentally different from previously known formulations of the problem of the self-convergence of the self-similar shock to the center of symmetry and its reflection from the center which has been constructed for the infinite area in Euler coordinates. Статья выполнена при поддержке Правительства РФ (Постановление № 211 от 16.03.2013 г.), соглашение № 02.А03.21.0011.

Country
Russian Federation
Keywords

analytical solution, shock wave, идеальный газ, аналитическое решение, planar symmetry, cylindrical symmetry, ударная волна, сферическая симметрия, цилиндрическая симметрия, ideal gas, плоская симметрия, spherical symmetry, УДК 533.6.011.1

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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