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Measurement of “Shock Wave Parameters” in a Novel Table-Top Shock Tube Using Microphones

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Abstract

A new manually operated pressure driven shock tube is proposed and demonstrated. Shock wave-associated parameters like velocity, Mach number, pressure, and temperature are computed using acoustic method. Experiment involves manually loading train of pressure pulses into a driver tube using a bicycle pump. The high pressure buildup in driver tube ruptures the diaphragm at critical pressure and generates a propagating shock wave in the driven section coupled with sensor section in which a couple of microphones are separated by a fixed distance. The propagating shock wave acoustical profile is recorded and its arrival time lag is measured using sound recording software. In a conventional method, piezo-electric pressure sensors are utilized to measure both pressure and time lag of shock wave between the sensors. In the proposed method, microphones are utilized to measure time lag of shock wave with sampling frequency of 768 KHz using computer supporting audio software. Utilizing time data, the said shock wave parameters are evaluated and reported. The performance of the proposed shock tube is compared with manually operated piston-driven Reddy tube.

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Funding

The authors thank the management of Sacred Heart College for the financial support through Don Bosco Research Grant (SHC/DB Grant/2017/01).

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Authors and Affiliations

  1. Department of Physics, Abdul Kalam Research Center, Sacred Heart College, Tirupattur, Tamilnadu, 635601, India

    A. Sivakumar & S. A. Martin Britto Dhas

  2. Department of Research and Development, AKSH Optifiber limited, Bhiwadi, Rajasthan, 301019, India

    S. Balachandar

Authors
  1. A. Sivakumar
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  2. S. Balachandar
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  3. S. A. Martin Britto Dhas
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Corresponding author

Correspondence to S. Balachandar.

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The authors declare that they have no conflict of interest.

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Highlights

✓ A new manually operated pressure-driven table-top shock tube using a bicycle pump is developed and tested.

✓ Shock wave related parameters are estimated using a microphone.

✓ Proposed shock tube is capable of producing Mach number above 2.

✓ Cost-effective method and suitable for laboratory/ research purposes.

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Sivakumar, A., Balachandar, S. & Dhas, S.A.M.B. Measurement of “Shock Wave Parameters” in a Novel Table-Top Shock Tube Using Microphones. Hum Factors Mech Eng Def Saf 4, 3 (2020). https://doi.org/10.1007/s41314-019-0033-5

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  • DOI: https://doi.org/10.1007/s41314-019-0033-5

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