Fast-Acting Valves for Use in Shock Tubes : Part 1, Construction and their characteristics

抄録

Two kinds of fast acting valves have been developed to replace diaphragm-breaking which is usually employed in the conventional shock tubes. One valve, which is called a type-H valve, opens in the direction of the shock tube axis and has an advantage that the moved distance required for full opening is very short. Another valve, called a type-V, moves vertical to the shock tube axis. The motion and the opening time of these valves were analyzed. The experimental results agree well with the calculated values, especially at a high actuating pressure of the valves. The type-H valve gives stronger shock waves, therefore it is more suitable for use in the shock tubes than the type-V valve. But the type-V valve has an advantage that the compression chamber has the same cross section as that of the expansion chamber, which may be desirable to the Ludwieg tubes.