The Free-Piston Shock Tube

Parent resource - Hypersonic Wind Tunnel Project

DOI - 10.1017/s0001925900003966
Journal Name - Aeronautical Quarterly
Publisher Name - Cambridge University Press (CUP)
Document Type - journal-article

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Paper Abstract- SummaryA study of shock tube operation with free-piston compression of the driver gas is presented. It is shown theoretically and experimentally that shock Mach numbers exceeding 30 in air may be obtained with an apparatus of moderate size. The operating limitations imposed by the maximum pressures allowed in the apparatus, by the ratio of the volume of the shock tube to the volume of the compression tube, and by the maximum pressure available for driving the piston are all explored theoretically. The compression process is studied experimentally, and results for three different compression tubes are used to indicate empirical rules for maximising the efficiency of the compression process. Streak photographs of the movement of the luminous gas behind the shock wave in a 1 in diameter shock tube are used to demonstrate the quality of the shock-wave motion produced.


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C Ramakrishnan  

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