Abstract Unstart/restart hysteresis characteristics analysis of an over-under TBCC inlet caused by backpressure and splitter
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Unstart/restart hysteresis characteristics analysis of an over-under TBCC inlet caused by backpressure and splitter

机译：背压和分流器引起的TBCC入口过低的启动/重启滞后特性分析

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摘要

AbstractFor a better understanding of the flow instability in TBCC inlet, the unstart/restart characteristics have been investigated. Firstly, the flow field of TBCC inlet at different transition stages are analyzed. As the splitter rotates from upside to downside (transition from low-speed inlet to high-speed inlet) with a fixed backpressure, the shock train moves downstream. The maximum backpressure that the inlet can tolerate also rises. Secondly, according to the unstart boundary (namely maximum backpressure) and restart boundary, it can be found that if the inlet is propelled to transit from started state to unstarted state, inlet restart cannot be achieved along the same control route. Unstart/restart hysteresis loops in each transition phase are discussed according to the simulation results. Besides the hysteresis behavior under backpressure, the same phenomenon is also observed during the inlet transition process. Finally, the distinctiveness of the hysteresis caused by inlet mode transition is also discussed.
机译： 摘要 为更好地了解TBCC入口中的流量不稳定性，已研究了启动/重启特性。首先，分析了TBCC进口在不同过渡阶段的流场。当分流器以固定的背压从上到下旋转（从低速进口到高速进口的转换）时，冲击波向下游移动。入口可以承受的最大背压也会上升。其次，根据未启动边界（即最大背压）和重新启动边界，可以发现，如果入口被推动从启动状态过渡到未启动状态，则无法沿着相同的控制路径实现入口重新启动。根据仿真结果讨论了每个过渡阶段的启/停磁滞回线。除了在背压下的滞后行为外，在入口过渡过程中也观察到相同的现象。最后，还讨论了进气模态转换引起的磁滞现象的特殊性。

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