Fuzhou LIU, Huacheng YUAN, Keyu ZHOU, Zhenggui ZHOU

DOI Number: 10.82241/ceas-hisst-2024-315

Conference number: HiSST-2024-315

Aiming at the challenges of the strong three-dimensional feature and difficulty in variable geometry for inward turning inlet, a variable-geometry design method combining inward turning and secondary shock wave compression is proposed. The start ability of the variable-geometry inward turning inlet is studied by numerical simulation, and the reason for reducing the start Mach number is analyzed. The results show that the Mach number range of the inlet start at the fixed-geometry state is broadened from Ma=3.5~7 to Ma=3~7, compared to the original inward turning inlet. Besides, the variable-geometry method of rotating the secondary compression surface enables the inward turning inlet to operate with
the start state at Ma=1.5~2.5. Combined with the analysis of the isentropic criterion, it is found that the variable-geometry inward turning inlet proposed in this paper mainly improves the start capability by reducing both the mass flow coefficient and the total contraction ratio, thus realizing the inlet start at Ma=1.5~7.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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