Correlation Method for Measuring Reflection Coefficients of Sharp-Edged Orifices for small-Amplitude Pressure Waves

Author:

Ali M. A.1,Reed E. W.2,Gill K. F.3

Affiliation:

1. Department of Mechanical Engineering, The University, Leeds LS2 9JT

2. Department of Mechanical and Production Engineering, The Polytechnic, Leeds LS1 3HE. Member of the Institution

3. Department of Mechanical Engineering, The University, Leeds. Member of the Institution

Abstract

A correlation technique using pseudo-random binary-sequence pressure-pulse testing is used to measure reflection coefficients of sharp edged orifices at the end of a duct. Within the range of the incident pressure-wave amplitude investigated in this paper it is believed that no other experimental means has yet been devised. A simple formula is derived from one-dimensional flow theory which gives values showing close agreement with the experimental results. End conditions for non-reflection are established to create an analogy to the hypothetical ‘infinite pipe’.

Publisher

SAGE Publications

Subject

General Engineering

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