N 0 ¼ N 0 p g ; t p ; t r
À
Á ¼ KN
ð9:65Þ
where
K Additional power coefficient;
p g Gas peak pressure;
N Steady-state power.
Starting power curve of gas generator, i.e., the relationship between output gas
power and starting time during starting process of gas generator, is shown in
Fig. 9.55.
Assuming the fitting model of starting power curve is
N
0
0 ¼ k
0 e
Àkt
þ M
ð9:66Þ
where
k
0 Fitting coefficient;
M Adjustment of parameters.
The starting power curve fitting model of Eq. (9.66) can be used to simulate the
corresponding parameters through the measured curve. Then starting power and
related starting characteristic parameters are determined by Eq. (9.65).
9.5.3 Starting Characteristics of Hydraulic System
Hydraulic pressure setup time t p of EHPU starting characteristic is an important
index for normal operation of hydraulic system of missile control system. By
Fig. 9.55 Starting power
curve of gas generator
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9 High-Temperature and High-Speed Gas Turbine Pump …