Numerical Study of the Effects of the Rupture Process of a Secondary Diaphragm in Expansion Tubes

Article type: Research Article

Authors: Kage, K. | Ishimatsu, K. | Okubayashi, T.

Affiliations: Department of Production Systems Engineering, Oita University, 700 Dannoharu, Oita, 870-1192, Japan. Tel: +81-97-554-7779; Fax: +81-97-554-7764; E-mail: kage@cc.oita-u.ac.jp | Department of Production Systems Engineering, Oita University, Oita, Japan

Abstract: The results of a numerical study are described in which the interactions of a primary shock wave with a secondary diaphragm in expansion tubes are taken into account. The developing wave pattern in the interacting process of the shock with a secondary diaphragm are visualized by many kinds of figures (e.g., the time-distance diagrams of the wave phenomena on the axis, the acoustic impedance contours, and the time histories of the pitot pressure on the axis), and the influences of the shape and rupture process of the diaphragm on the quality of the test gas are explored.

Keywords: Expansion tubes, Secondary diaphragm, Shock propagation, Numerical visualizeation, Contact surface

Journal: Journal of Visualization, vol. 6, no. 2, pp. 107-114, 2003