A pneumatic valve has been designed to replace diaphragms in shock tubes and a diaphragmless shock tube has been constructed for use with the pneumatic valve. Performance tests have been carried out for the shock tube. The present apparatus is shown to be capable of producing shock waves up to 3.5 in Mach number and be convenient to use. It is also shown that the flow in the driven section of the shock tube is equivalent to that in a conventional shock tube.
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Takano et al. (1984) studied this question.
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