Technical documentation and software quality assurance for project ...
Technical documentation and software quality assurance for project ...
Technical documentation and software quality assurance for project ...
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€<br />
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€<br />
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€<br />
From Cook et al (1990), the emissive power of the flame, E, is calculated<br />
E = FQΔHc ⋅10−3<br />
A<br />
with<br />
kg<br />
Q = mass discharge (<br />
s<br />
€<br />
)<br />
J<br />
ΔHc = heat of combustion (<br />
kg )<br />
A = surface area of the flame ( m 2 )<br />
From Chamberlain, the fraction of heat radiated from the flame surface, F, is<br />
€<br />
F = 0.21exp(−0.00323u<br />
€<br />
j) + 0.11<br />
The atmospheric attenuation coefficient, τ , described earlier is used <strong>for</strong> jets <strong>and</strong> flares.<br />
MODEL OUTPUT<br />
€<br />
The model returns the ground level distance <strong>for</strong> each of the Levels of Concern (LOC).<br />
The flame centroid is the center of the footprint.<br />
NOMENCLATURE<br />
do hole or throat diameter, m<br />
F fraction of heat radiated from surface of flame<br />
LB length of flame measured from tip of flame to center of plane, m<br />
LBo M j<br />
LB in still air, € m<br />
mach number of exp<strong>and</strong>ed jet<br />
m ˙<br />
€<br />
R<br />
kg<br />
mass flow rate,<br />
€ s<br />
velocity ratio, dimensionless<br />
€<br />
Pc N<br />
static pressure at the hole exit plane,<br />
m<br />
€<br />
€<br />
2<br />
Po atmospheric pressure, 1.013⋅10<br />
€<br />
5 N<br />
m 2<br />
⎛<br />
⎞<br />
⎜<br />
⎟<br />
⎝<br />
⎠<br />
Ts u j<br />
V<br />
stagnation temperature, gas temperature inside the container, K<br />
m<br />
velocity of the gas in the exp<strong>and</strong>ed jet,<br />
s<br />
m<br />
wind velocity,<br />
€<br />
s<br />
Wgk kg<br />
kilogram molecular weight of € gas,<br />
mol<br />
€<br />
€<br />
29
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