Choking of a Subsonic Induction Tunnel by the Flow from an Induction Nozzle Page: 3 of 21
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NACA TN 2730
A cross-sectional area
a velocity of sound
f functional notation
g acceleration due to gravity
H total or stagnation pressure
M Mach number, V/a
p static pressure
Q mass flow, pAV
R gas constant
T absolute temperature; static unless otherwise specified
7 ratio of specific heats (1.4 for air)
p mass density
1 station at beginning of test section
2 station at end of test section for type I tunnel
3 station at juncture of diffuser and induction-jet nozzle for
type I tunnel
4 station at juncture of test section and induction-jet nozzle
for type II tunnel
5 station downstream from station 4 where p is constant
c station at end of choker jet
j pertains to inducing flow through induction-jet nozzle
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Lindsey, W. F. Choking of a Subsonic Induction Tunnel by the Flow from an Induction Nozzle, report, July 1952; (digital.library.unt.edu/ark:/67531/metadc56171/m1/3/: accessed January 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.