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Calibration of sonic valves for the laminar flow control, leading-edge flight testSonic needle valves were calibrated to measure and control airflow in the suction system for the leading-edge flight test. The procedure and results for the calibration flow test of 4:41 flight valves are given. Mass-flow rates, which ranged from 0.001 to 0.012 lbm/sec, and maximum back pressure were measured for total temperatures from -30 F to 75 F and total pressures from 120 to 540 psf. Correlating equations are obtained for mass-flow rate as a function of total pressure, total temperature, and valve opening length. The most important aspect of flow measurement and control is found to be the measurement of valve opening length.
Document ID
19850015396
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Petley, D. H. (NASA Langley Research Center Hampton, VA, United States)
Alexander, W., Jr. (NASA Langley Research Center Hampton, VA, United States)
Wright, A. S., Jr. (NASA Langley Research Center Hampton, VA, United States)
Vallas, M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1985
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.60:2423
L-15893
NASA-TP-2423
Accession Number
85N23707
Funding Number(s)
PROJECT: RTOP 505-45-63
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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