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Technical Briefs

A Model of Piston Sliding Process for a Double Piston-Actuated Shock Tube

[+] Author and Article Information
I. da S. Rêgo

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Fukuoka 816-8580, Japanrego@aees.kyushu-u.ac.jp

T. Ando, K. Misumi, T. Miyazaki, S. Nishiyori

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Fukuoka 816-8580, Japan

K. N. Sato

Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga Koen, Fukuoka 816-8580, Japansatcho@triam.kyushu-u.ac.jp

M. Sakamoto, S. Kawasaki

Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga Koen, Fukuoka 816-8580, Japan

J. Fluids Eng 130(4), 044501 (Apr 01, 2008) (3 pages) doi:10.1115/1.2903521 History: Received July 05, 2007; Revised October 08, 2007; Published April 01, 2008

A double piston-actuated structure designed for replacing the use of diaphragms in conventional shock tubes has been recently developed. In order to clarify the piston sliding process for this structure, a simplified model based on the motion equation of its main sliding piston has been developed. Calculated piston sliding time against pressure ratio has been numerically obtained and indirectly evaluated by examining the experimental curves of the performance of the diaphragmless structure.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

Variation of Ms,theor∕Ms,expt with P4∕P1. Shock waves in the 0.3CO2+0.7N2 mixture using He as the driver gas and N2 as the actuating gas, taking P1 as a parameter.

Grahic Jump Location
Figure 2

Calculated piston sliding time against pressure ratio, taking the pressure of the driven gas as a parameter

Grahic Jump Location
Figure 1

Scale drawing of the double piston-actuated structure

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