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A Newly Developed Large Diameter Diaphragmless Shock Tube for Studies on CO₂-N₂ Gas-Dynamic Laser

Israel da Silveira RÊGO, Kohnosuke SATO¹⁾, Yoriaki MIYOSHI, Taketora ANDO, Kentaro GOTO, Mizuki SAKAMOTO¹⁾, Shoji KAWASAKI¹⁾ and TRIAM Exp. Group¹⁾

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

1)

Research Institute for Applied Mechanics, Kyushu University

(Received 1 June 2007 / Accepted 19 June 2007 / Published 13 July 2007)

Abstract

A large diameter diaphragmless shock tube has been recently developed and designed to perform detailed studies of CO₂-N₂ gas-dynamic laser (GDL). This large diameter diaphragmless shock tube offers various advantages over the conventional shock tubes (diaphragm-type) as longer test times, higher degree of reproducibility of shock-tube data, and especially low-impurity operation condition. The latter advantage is experimentally demonstrated herein, which is very critical issue in the CO₂-N₂ GDL studies. A supersonic nozzle section was mounted at the end wall of the shock tube and instrumented for simultaneous measurement of laser output power and energy. The GDL action in a CO₂-N₂ mixture under low impurity condition has been obtained by using the large diameter diaphragmless shock tube for the first time.

Copyright (c) 2007 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

shock tube, diaphragmless, shock waves, supersonic nozzle, CO₂-N₂ system

DOI: 10.1585/pfr.2.033

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References

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This paper may be cited as follows:

Israel da Silveira RÊGO, Kohnosuke SATO, Yoriaki MIYOSHI, Taketora ANDO, Kentaro GOTO, Mizuki SAKAMOTO, Shoji KAWASAKI and TRIAM Exp. Group, Plasma Fusion Res. 2, 033 (2007).