7.7 Development of a Compact NH_3 Jet - Seeding Effect of Dissociated NH_3
Due to NH_3 dissociating the terminal velocity will change due to the seeding
effect. A calculation will be performed here predicting the terminal velocity
as a function of the NH_3 dissociation fraction f. Note that it
is pointless, as argued in the previous section, to do the calculation
as a function of nozzle temperature since f depends largely on the
reaction rate and gas handling system at low temperatures.
The calculation was performed using equations (2) and (3) and the result
is shown in Figure 15 for a nozzle temperature of 300 K and 600 K. It should
be noted that velocity slip is neglected and the assumption was made that
the gas handling system is in equilibrium with the nozzle in terms of mole
fraction of specie present.
Figure 15: Molecule Energy as a Function of NH_3 Dissociation
Fraction for Nozzle Temperatures 300 K and 600 K
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