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High-Frequency Generation of High-Pressure Pulses Using a Diaphragmless Shock Tube

  • Koji Teshima
Conference paper

Abstract

We have developed a high-pressure pulse generator at a high repetitive rate by combining a diaphragmless shock tube with shock strengthening by area convergence. The diaphragmless shock tube generates shock waves with Mach numbers of up to 2 traveling in the tube at atmospheric pressure. The shock waves are accelerated by reducing the cross sectional area of the tube. The maximum pressure at the tube end, where the cross sectional area was reduced to 1/64 from the original, exceeded 10MPa and the pulse width was about 25 μ sec. These pressure pulses were generated at a rate of one pulse per several seconds. The facility was used to study biomechanical and biological effects of high-pressure pulses on microorganisms and DNA.

Key words

High pressure pulse generator Diaphragmless shock tube Shock acceleration 

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References

  1. Russel DA (1967) Shock-wave strengthening by area convergence J. Fluid Mechs. 27:305CrossRefADSGoogle Scholar
  2. Saito T, Nakatsuji H, Teshima K (1986) Numerical simulation and visualization of freejet flow-fields. Trans. SASS 28:240Google Scholar
  3. Teshima K, Ohshima T, Tanaka S, Nagai T (1993) Biomechanical effects of shock waves microorganisms and λ-phage DNA. These ProceedingsGoogle Scholar
  4. Whitham GB (1958) On the propagation of shock waves through regions of non-uniform area or flow. J. Fluid Mechs; 4:337CrossRefMATHADSMathSciNetGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Koji Teshima
    • 1
  1. 1.Kyoto University of EducationFushimi-ku, KyotoJapan

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