NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Due to the lapse in federal government funding, NASA is not updating this website. We sincerely regret this inconvenience.

Back to Results
Calibration of Air-Flow Meters for J33 Compressor InvestigationFlow-metering devices used by the NACA and by the manufacturer of the J33 turbojet engine were calibrated together to determine whether an observed discrepancy in weight flow of approximately 4 percent for the two separate investigations might be due to the different devices used to meter air flow. A commercial adjustable orifice and a square-edge flat-plate orifice used by the NACA and a flow nozzle used by the manufacturer were calibrated against surveys across the throat of the nozzle. It was determined that over a range of weight flows from 18 to 45 pounds per second the average weight flows measured by the metering device used for the compressor test would be 0.70 percent lower than those measured by the metering device used in the engine tests and the probable variation about this mean would be +/- 0.39 percent. The very close agreement of the metering devices shows that the greater part of the discrepancy in weight flow is attributable to the effect of inlet pressure.
Document ID
20050019261
Acquisition Source
Langley Research Center
Document Type
Other - NACA Research Memorandum
Authors
Kovach, Karl
(National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Withee, Joseph R., Jr.
(National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Date Acquired
August 22, 2013
Publication Date
September 2, 1948
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NACA-RM-SE8H03
Report Number: NACA-RM-SE8H03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available