Elbow Flow Meters : Effects of Wall Curvature Inaccuracies on Discharge Coefficients

概要

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Effects of wall curvature inaccuracies on discharge coefficients of elbow flow meters are examined theoretically and experimentally. The flow is analyzed mathematically for a two-dimensional potential flow and the result is confirmed by experiments. If a commercial elbow is used as a flow meter, the error in the discharge coefficients resulting from the inaccuracies of curvature may be assumed to reach about 5 percent. Thus it can be elucidated that at least a part of scattering in the discharge coefficients appearing in the past investigations should be attributable to the wall curvature inaccuracies of elbows used.
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