高总温来流下的连续旋转爆震验证试验

Validating Experiment of Continuous Rotating Detonation under High Total Temperature Air

为验证吸气式连续旋转爆震推进的可行性,在直连式试验台上开展了连续旋转爆震试验。采用三组元空气加热器模拟吸气式推进时的高总温来流,其设计流量600g/s,总温860K。采用热射流切向喷注的方法成功起爆了H2/air连续旋转爆震波,并实现了稳定自持传播。在H2/air当量比为0.86时,连续旋转爆震波以单个波头的同向传播模态传播,且其未影响到空气加热器的正常工作。爆震波的传播频率为3.68k Hz,与高频压力FFT分析所得的主频3.67k Hz吻合较好;爆震波传播速度为1248m/s。在未测量高频压力的情况下开展了长程试验,结果表明,在高总温来流条件下,连续旋转爆震波也可以在更长时间范围内稳定工作。

Experiments were performed on a direct-connect experimental facility to validate the working feasibility of continuous rotating detonation（CRD） in the airbreathing mode. A tripropellant air-heater was used to produce vitiated air,and its designed mass flow rate and total temperature were 600g/s and 860 K,respectively. CRD were realized and sustained with H2 and vitiated air,using a pre-detonator tangent to the detonation combustor for detonation initiation. It is found that one detonation wave propagates in the one direction mode（ODM） in the detonation combustor,with H2/air equivalence ratio of 0.86,and the operation of the airheater is not affected by the CRD. The average propagation frequency based on the measured high-frequency pressure is 3.68 k Hz,in good agreement with the dominant frequency of 3.67 k Hz based on FFT. The propagation velocity is 1248 m/s correspondingly. A long-duration CRD experiment without high-frequency pressure acquisition was carried out,and it was demonstrated that the CRD can propagate continuously for a long time under high total temperature air.