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在空气流量 4 6 9kg/s左右的地面连管试验台上 ,研究了高超声速进气道中壁龛式预燃室内外流场的气流特性。试验发现 ,壁龛式预燃室中流动状态的变化与激波 附面层之间相互作用关系密切。虽然在壁龛式预燃室中测得的总压值较低 ,气流总压损失较大 ,但仍满足两股气流之间超燃点火的压力匹配要求。因此 ,提出的壁龛式预燃室方案是可行的。
The air flow characteristics of the niche pre-combustion chamber in the hypersonic inlet were studied on a ground-connected tube test rig with air flow of 469 kg / s. It is found that the interaction between the change of the flow state in the alcove pre-combustion chamber and the shock-cladding layer is close. Although the total pressure measured in the alcove pre-combustion chamber is low and the total pressure drop is large, the pressure matching requirements for the overfire firing between the two streams are still met. Therefore, the proposed alcove pre-chamber scheme is feasible.