Pressure-Time Flow Measurements Under Adverse Conditionsby Gerald A. Schohl, Tennessee Valley Authority, Norris, United States,
Abstract: Theoretical analyses suggest that the pressure-time method is capable of accurately determining flow rate in the short, varying cross section, 'semi-scroll' penstocks found in relatively low head main river hydro plants. The accuracy achieved should depend primarily on the accuracy to which the pipe factor is determined (the integrated length divided by cross-sectional area of a control volume defined for a pressure-time measurement) and the accuracy to which small pressure differences can be measured.
Subject Headings: Pressure measurement | Pressurized flow | Pressure pipes | Volume measurement | Flow measurement | Flow rates | River flow | Conduits
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