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The Free-Piston Shock Tube

Published online by Cambridge University Press:  07 June 2016

R. J. Stalker*
Affiliation:
Physics Department, Australian National University, Canberra
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Summary

A 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.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society. 1966

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References

1. Camm, J. C. and Rose, P. H. Electric shock tube for high velocity simulation. Physics of Fluids, Vol. 6, p. 663, 1963.Google Scholar
2. Longwell, P. A., Reamer, H. H., Wilburn, N. P. and Sage, B. H. Ballistic piston for investigating gas phase reactions. Industrial and Engineering Chemistry, Vol. 50, p. 603, 1958.Google Scholar
3. Winter, D. F. T. Multiple shock compression using a piston of finite weight. Journal of Fluid Mechanics, Vol. 8, p. 264, 1960.Google Scholar
4. Stalker, R. J. An investigation of free piston compression of shock tube driver gas. Division of Mechanical Engineering, National Research Council, Canada, Report MT-44, 1961.Google Scholar
5. Greif, R. The free piston shock tube. PhD Thesis, Harvard University, 1962.Google Scholar
6. Greif, R. and Bryson, A. E. Measurements in a free piston shock tube. AIAA Journal, Vol. 3, p. 183, January 1965.Google Scholar
7. Lukasiewicz, J. Shock tube theory and applications. National Aeronautical Establishment, Canada, Report R15, 1952.Google Scholar
8. Roshko, A. On flow duration in low-pressure shock tubes. Physics of Fluids, Vol. 3, p. 835, 1960.Google Scholar
9. Mirels, H. Shock tube test time limitation due to turbulent wall boundary layer. AIAA Journal, Vol. 2, p. 84, 1964.Google Scholar
10. Stalker, R. J. Area change with a free-piston shock tube. AIAA Journal, Vol. 2, p. 396, 1964.Google Scholar
11. Dudgeon, E. H. Proceedings of the 5th International Congress on High Speed Photography, Washington, 1960. (New York: Society of Motion Picture and Television Engineers, p. 303, 1962.)Google Scholar
12. Nagamatsu, H. T. Shock tube technology and design. Fundamental data obtained from shock tube experiments, p. 86. (Edited by Ferri, A..) Pergamon Press, London, 1961.Google Scholar