高总温空气与汽油燃料的旋转爆震验证试验

为验证高总温空气来流条件下汽油燃料旋转爆震的可行性，开展了气液两相旋转爆震发动机试验研究。旋转爆震发动机环形燃烧室外径和内径分别为202mm和166mm，长度为155mm。通过空气加热器模拟高总温空气来流环境，汽油和空气采用分开喷注的方式，分别通过高压喷嘴和环缝进入燃烧室。试验采用垂直安装的预爆震管成功起爆了旋转爆震波，并实现了旋转爆震波的连续稳定传播。试验结果表明：当空气质量流量为1110.0g/s，当量比为0.97，空气总温为713K时，旋转爆震波以双波对撞模态在燃烧室内连续传播，爆震波传播频率为1827.31Hz，与高频压力信号经快速傅里叶变换得到的主频一致，爆震波传播速度为1059.6m/s。在空气质量流量为1110.0g/s，当量比为0.84，空气总温为713K的工况下进行了3s的长程试验，验证了以高总温空气为氧化剂、汽油为燃料的旋转爆震发动机长时间连续稳定工作的可行性，获得的旋转爆震波传播频率为1907.5Hz。

Verification Experiment of Rotating Detonation Fueled by Gasoline with High Total Temperature Air

In order to verify the feasibility of rotating detonation fueled by gasoline under high total temperature air, experimental research of gas-liquid two-phase rotating detonation engine was carried out. The outer diameter and inner diameter of the annular combustor are 202mm and 166mm respectively, and the length is 155mm. The air heater is used to simulate the high total temperature air environment. Gasoline and air are injected into the combustor through high-pressure nozzle and annular gap respectively. The rotating detonation wave was successfully initiated by a perpendicularly installed pre-detonator, and continuous propagation of the rotating detonation wave was realized. The experimental results show that when the air mass flow rate is 1110.0g/s, the equivalence ratio is 0.97 and the air total temperature is 713K, the rotating detonation wave propagates continuously in two-wave collision mode in the combustor. The propagation frequency of detonation wave is 1827.31Hz, which is consistent with the main frequency obtained from the Fast Fourier Transform of high-frequency pressure signal, and the propagation speed of detonation wave is 1059.6m/s. A long duration test for 3s was performed at the air mass flow rate of 1110.0g/s, equivalence ratio of 0.84 and air total temperature of 713K. The continuously working feasibility of the rotating detonation engine with high total temperature air as oxidant and gasoline as fuel for a long time was verified. The obtained rotating detonation wave propagation frequency is 1907.5Hz.