VERIFICATION OF A THEORETICAL METHOD OF DETERMINING DISCHARGE COEFFICIENTS FOR VENTURIS OPERATING AT CRITICAL FLOW CONDITIONS
ARO INC ARNOLD AFS TN
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A venturi contour designed specifically for use at critical flow conditions is described, and a theoretical method is presented for determining the discharge coefficient of this venturi. An experimental investigation was conducted to determine the discharge coefficient of such a venturi, and the results are compared with the theoretical values. This investigation covered a range of Reynolds number from 0.4 x 10 to the 6th power to 5.4 x 10 to the 6th power based on venturi throat diameter. The venturi used had a throat diameter of 5.6436 in. and an airflow capacity of 8.6 lbsec at an inlet total pressure of one atmosphere and an inlet total temperature of 519 R. The values of discharge coefficient ranged from 0.992 to 0.994, and the theoretically and experimentally determined coefficients agreed within or - 0.06 over the range of conditions investigated.
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