Inverse Design Method of Wide Range Self-starting Inward-turning Inlet Based on the Concept of Double Design Points

Cai ZEJUN, Zheng XIAOGANG, Guo MENGLEI, Zhu WENLEI, Zhu CHENGXIANG, You YANCHENG

DOI Number: N/A

Conference number: HiSST-2025-178

Hypersonic vehicles require higher inlet performance across expanding flight envelopes. Inward-turning inlets offer high compression efficiency and mass capture but suffer from low-Mach starting difficulty due to that efficiency. Conventional single-point designs struggle with wide-speed-range performance. To address this, this paper proposes a wide-speed-range self-starting internal contraction inlet inverse design method based on the Double Design Points (DDP) concept. The method constructs a DDP self-starting basic flow field by controlling internal/external compression strengths and generates the 3D inlet surface via the osculating method to inherit the flow field characteristics. Numerical
simulations confirm full mass flow capture at the high Mach number design point (Ma6) and self-starting capability at the low Mach number design point (Ma4.5). During starting, the large separation bubble causing unstart is gradually engulfed by the throat, shrinking into a small bubble. This provides a new approach to enhance inlet wide-speed-range capability.

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Hypersonic Vehicles, self-starting, speed-range

In Categories: 1.Events, 1.HiSST 2025, Propulsion Systems & Components

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