Numerical evaluation of mass-flow coefficient and associated parameters from wake-survey equations Page: 4 of 39
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NAGA TN No. 1381
The present pe.per presents a method with charts by means of
whict the mass-flow-coefficient, inlet-velocity ratio, and mass-flow
rate can be quickly evaluated in a few steps by use of measured values
of static-pressure coefficient, total-pressure-loss coefficient, and
free-stream Mach number. The equations have been evaluated for both
isoenergic flows and flows wherein mechanical or thermal energy is
added. The fundamental principles may be applied to tho measurement
of flow from jet-propulsion units; however, under these conditions
the mass of the fuel and the change in the value of the ratio of
specific heats must be considered,
a speed of sound, feet per second
V velocity, feet per second
M Mach number (V/a)
p mass density, slugs per cubic foot
q dynamic pressure, pounds per square foot IpY2)
p static pressure, pounds per square foot
P static-pressure coefficient P L2)
H total pressure, pounds per square foot
A .total-pressure loss (a a)
-- total-pressure-loss coefficient
A area, seqare feet
F frontal area, square feet
m mass-flow rate, slugs per second (pAV)
C mass-flow coefficient m
o' point mass-flow coefficient (2
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Smith, Norman F. Numerical evaluation of mass-flow coefficient and associated parameters from wake-survey equations, report, August 1947; (digital.library.unt.edu/ark:/67531/metadc55437/m1/4/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.