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MODEL 2234 DIGITAL FLOW COMPUTER
K.
Orifice Coefficient
Given from H. and J. above.
C
d0
=
first orifice coefficient constant
C
d1
=
second orifice coefficient constant
C
d2
=
third orifice coefficient constant
C
d3
=
fourth orifice coefficient constant
C
d4
=
fifth orifice coefficient constant
F
1
=
iteration flow factor
Constants:
X
c
= value of X where low Reynolds number switch occurs,
1.142 139 337 256 165 (Reynolds number of 3502.2)
A,B correlation constants for low Reynolds number factor
A = 4.343 524 261 523 267
B = 3.764 387 693 320 165
1.
Initialize C
d
to value at infinite Reynolds number.
C
d
= C
d0
2.
Calculate X, the ratio of 4,000 to the assumed Reynolds
number, according to the formula:
X = F
1
/ C
d
SECTION 3
132