Reflection of a weak discountinuity of the axis and the plane of symmetry

Bulat, P.V.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 мая 2015 г.

Автор: Bulat P.V.
Журнал: American Journal of Applied Sciences
Том: 11
Номер: 6
Год издания: 2014
Издательство: Science Publications
Местоположение издательства: United States
Первая страница: 1025
Последняя страница: 1030
DOI: 10.3844/ajassp.2014.1025.1030
Аннотация: In this article we consider the problem of discontinuous characteristic (weak discontinuity) reflection from the axis and the plane of symmetry of the supersonic flow. There is a known problem of perturbations radial focusing when during numerical calculations reflection of a weak perturbation wave from the axis of symmetry leads to an abrupt change in the distribution of dynamics variables along the axis, i.e., to a strong discontinuity, which seems unphysical. By an asymptotic expansion in the vicinity of the axis of symmetry the expression for the intensity of a weak discontinuity was found before the point of intersection with the axis as well as beyond it. It is shown that the appearance of strong discontinuity in the results of numerical calculations is a computing feature, which is a consequence of the difference approximation of the equations. A solution for changes in the intensity of a weak discontinuity as it approaches the axis or plane of symmetry in the plane or axisymmetric supersonic flow was obtained as well.
Добавил в систему: Булат Павел Викторович

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