回流型脉冲爆震燃烧室工作特性分析

In order to obtain the operating characteristics of the reverse flow pulse detonation combustor at different operating frequencies, the change rule of outlet total pressure, total temperature and flow rate and the boosting capability of the detonation combustor were measured and calculated when the operating frequency is 10 ~ 30Hz. The results show that the total pressure and total temperature of outlet gas have very high peak value and high platform area. When the operating frequency of the detonation chamber is 10 ~ 30Hz, the pressure platform value is 0.36 ~ 0.91MPa, and the time-average temperature is 710 ~ 1270K. In addition, the exhaust flow is very concentrated. Taking 10Hz as an example, 60.5% of the gas in a whole cycle is discharged in 16% duration of a detonation cycle. Therefore, the mass weighted average of the total pressure of the outlet gas is carried out. The results show that the pressure ratio of the detonation chamber decreases with the increase of operating frequency. The variaion range of the pressure ratio is between 2.05 and 2.37.