Accession Number : ADA261227


Title :   Verification of the Theoretical Discharge Coefficient of a Sub-Critical Flow Meter


Corporate Author : GENERAL ELECTRIC CO EVENDALE OH AIRCRAFT ENGINE GROUP


Personal Author(s) : Lahti, D J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261227.pdf


Report Date : Sep 1990


Pagination or Media Count : 144


Abstract : The objectives of this program were to study the factors leading to increased errors 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.


Descriptors :   *AIR FLOW , *FLOW RATE , *GAS FLOW , *FLOWMETERS , TURBOFAN ENGINES , COEFFICIENTS , PRESSURE , ENGINES , VENTURI TUBES , ENGINE CYLINDERS , MACH NUMBER , CALIBRATION , LIGHTWEIGHT , ERRORS , ACCURACY , COMPRESSIBLE FLOW


Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE