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: [email protected] | 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.