UNCERTAINTY ESTIMATION OF SHOCK TUBE PRESSURE STEPS

• Abstract:

  In this paper we describe the work performed at the National Physical Laboratory (NPL) to develop dynamic pressure standards based on shock tube techniques, including the checks carried out to ensure that the ideal gas theory, used to predict step pressure changes, is valid in our circumstances. We go on to consider the major uncertainty contributions to the calculated step pressure, suggest ways to minimise these, and conclude by calculating a target uncertainty for NPL’s new 7.0 MPa steel shock tube.
• Keywords:

  shock tube, dynamic pressure, uncertainty
• Download:

  IMEKO-WC-2015-TC16-336.pdf
• DOI:

  _unreg_wc-2015.336

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