| Citation: | CHEN Yidan, CHEN Hongyu, WANG Sheng. Simulation of active control strategy for cavitation failure of LOX/kerosene engine[J]. Journal of Aerospace Power, 2023, 38（6）：1506-1515 doi: 10.13224/j.cnki.jasp.20210609
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Taking the inlet pressure of the oxidizer boost pump as the monitoring object, the fuel flow rate into the gas generator can be reduced by the action flow regulator during the cavitation failure of the oxidizer main pump, then the mixture ratio can be stabilized and the combustion temperature can be suppressed, so as to avoid the catastrophic consequences of excessive gas temperature. The control strategies of 98.8%, 97.2%, 89.5% and 74.5% rated flow rate and the control delay of 0, 0.15, 0.23 s and 0.30 s were set up. The effectiveness was studied by simulation. The results showed that the optimum fuel flow rate under cavitation failure was used to keep the mixing ratio rating, and the maximum allowable time delay decreased with the increase of cavitation failure severity. When the tank pressure was reduced to 53%, 43% and 33% of the rated pressure within 0.10 s, the maximum allowable action delay was 0.23, 0.17 s and 0.13 s, respectively. The optimal control time delay reference was 0.09 s, increasing the delay led to overshoot of some component parameters, and reducing the delay led to the possibility of engine flameout.
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