CALIBRATION OF THREE VENTURI AIRFLOW METERING SYSTEMS WITH STING-MOUNTED CENTERBODIES AT CRITICAL AND SUBCRITICAL FLOW CONDITIONS
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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An experimental investigation was conducted to determine the discharge coefficient of a venturi airflow meter with various diameter centerbodies installed. A critical flow venturi for which a theoretical discharge coefficient had been experimentally verified was used as the calibration standard. The discharge coefficients for the test venturi without centerbody and with centerbodies of two different diameters were determined over a range of venturi throat Reynolds numbers from 320,000 to 3,200,000 at a constant inlet air total temperature of 70F. The experimentally determined coefficients were in good agreement with the theoretical value for all configurations tested. Maximum deviation 0.3 percent of discharge coefficient from the theoretical value occurred with the venturi without centerbody operating at critical flow conditions.
- Test Facilities, Equipment and Methods
- Fluid Mechanics