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AIR1168/1
Thermodynamics of Incompressible and Compressible Fluid Flow
2011-06-01
有效
【范围】 1.1 Scope The fluid flow treated in this section is isothermal, subsonic, and incompressible. The effects of heat addition, work on the fluid, variation in sonic velocity, and changes in elevation are neglected. An incompressible fluid is one in which a change in pressure causes no resulting change in fluid density. The assumption that liquids are incompressible introduces no appreciable error in calculations, but the assumption that a gas is incompressible introduces an error of a magnitude that is dependent on the fluid velocity and on the loss coefficient of the particular duct section or piece of equipment. Fig. 1A-1 shows the error in pressure drop resulting from assum ing that air is incompressible. With reasonably small loss coefficients and the accuracy that is usually required in most calcula tions, compressible fluids may be treated as incompressible for velocities less than Mach 0.2. At higher velocities and for large loss coefficients (Kt and 4/L/D), compressible flow analysis should be used. {2e3405cb61c2229fe808128e37127a95.jpg}
【与前一版的变化】

包含缩略语

abs
AFTR
AIR
ASTIA
atm Atmosphere
av
Btu
cal
comp
cr
d
deg
Dept.
dia
Eng
Eq./Eqs.
°F
Fig./Figs
fpm
fps
ft
ft/min
ft/sec
Hg
h
hr
in.
in.2
in. Hg
in. Hg abs
in. H20
in. H20 abs
incomp
isen
K
lb
lb,in.2
lb/m.2 abs
lb/ft2
lb/ft2 abs
lb/min
lb/hr
lb/sec
In
max
min
NACA
no.
%
Par./Pars.
p.
pp.
psf
psfa
psi
psia
psig
PTC
°R
R.A.E.
Ref./Refs.
RM
rpm
SAE
Sat
S.L.
sta.
sec
TN
TR
tr
Trans. ASME
W
WADC

被引文件

Compartment Decompression Analysis
Compartment Decompression Analysis

包含图表

Incompressible Flow,
(1A-2)
(1A-3)
(1A-4)
Formula 1
Boundary Layers and
(1A-5)
(1A-6)
Pipe Velocity and Fr
Relative Roughness,
(1A-7)
(1A-8)
(1A-9)
Table for Unit Conve
Table for pg of Air
Formula 2
(1A-10)
(1A-11)
Friction Factor Vers
Formula 3
ReynodlsNumebrinGase
ReynoldsNumberinLqiu
Coordinates for Reyn
(1A-12)
(1A-12a)
(1A-13)
Coordinates for Reyn
(1A-14)
(1A-15)
Friction Factor Vers
Bend Loss
Loss Coefficient Ver
Correction Factor fo
Loss Coefficient for
Loss Coefficient for
Loss Coefficient for
Loss Coefficient for
Loss Coefficient Ver
Correction Factor fo
Loss Coefficient for
Loss Coefficient for
Loss Coefficient for
Loss Coefficient for
Effect of Exit Duct
(1A-16)
(1A-17)
Correction Factor fo
Loss Coefficient for
Loss Coefficient for
Loss Coefficient for
Turning Vanes Geomet
(1A-18)
(1A-19)
(1A-20)
Number of Vanes for
Angle of Attack for
(1A-21)
Thin Vanes, Noncircu
Bend Angle and Gap t
(1A-22)
Thick Vanes (Calcula
(1A-23)
Loss Coefficient for
Effect of Gap to Cho
Loss Coefficient for
Loss Coefficient for
Sketch of Inside and
(1A-24)
(1A-25)
Pressure Loss Correc
Sketch of Typical Ty
Formula 4
Angular Displacement
Loss Coefficient of
(1A-26)
Loss Coefficient of
Sketch of a Typical
Total Loss Coefficie
(1A-27)
(1A-28)
Sketch of a Straight
(1A-29)
(1A-30)
Sketch of a Straight
(1A-31)
Curved Wall Diffiise
Sketch of a Truncate
(1A-32a)
(1A-32)
(1A-33)
(1A-34)
Diffiiser Expansion
(1A-35)
(1A-36)
Sketch of a Diffuser
Equivalent Expansion
(1A-37)
Expansion Factor for
(1A-38)
Sketch of an Orifice

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