Verification of the Theoretical Discharge Coefficient of a Sub-Critical FlowMeter

摘要

The objectives of this program were to study the factors leading to increasederrors in sub-critical flow metering, utilize existing theoretical methods to design a new sub-critical flow meter for very high accuracy, predict its discharge coefficient, and then experimentally verify it by calibration with an industry standard critical flow meter. The meter design was typical of that used for modern, lightweight, engine mounted bellmouths, but its size was small enough to allow its calibration in a high accuracy laboratory environment. Thus this program provides a calibration of the theoretical method, and establishes the link between a traceable metering standard and large engine bellmouths whose air flow rates exceed the capacity of any of the worlds calibration facilities.... Theoretical discharge coefficient, sub-critical airflow metering, Venturi calibration.