Exploring experimentally a high frequency pulse detonation rocket engine(PDRE)

We aim to explore effective measures for raising the working frequency of PDRE. Section 1 of the full paper explains our PDRE experimental setup as shown in Fig. 1. Section 2 briefs the thrust calibration testing technique for ensuring that thrust is accurately measured. Subsection 3.1 presents the measures for raising the working frequency of PDRE. The experimental results, shown in Figs. 5 through 10, and our analysis of them support our three preliminary conclusions given in section 4; these conclusions are mainly: (1) the measures we take for raising the working frequency are effective; for the frequency range of 35 Hz to 40 Hz, the PDRE model works stably; (2) the working frequency in our experiments reaches up to 40 Hz, which is, to our knowledge, the highest working frequency of PDRE that uses liquid fuel and solenoid valves; when the working frequency is 35 Hz, the peak pressure of detonation wave is more than 3.4 MPa and its time-averaged thrust after calibration is 43.9 N; when the working frequency is 40 Hz, the peak pressure of detonation wave is about 3.2 MPa and the time-averaged thrust after calibration is 50 N; (3) after calibration, the accuracies of thrust measured for the working frequencies of 35 Hz and 40 Hz are raised 28.7% and 28.6% respectively.