ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Aero-optical effect regulation of supersonic vehicles based on variable-slope Ramp-VG arrays
Received date: 2025-01-23
Revised date: 2025-03-03
Accepted date: 2025-03-04
Online published: 2025-03-06
Supported by
National Natural Science Foundation of China(52192633);Strategic Priority Research Program of the Chinese Academy of Sciences(XDB 1050402)
To address the aero-optical effects caused by supersonic vehicles flying within the atmosphere， this study proposes an array of variable-slope Ramp Vortex Generator （Ramp-VG）. By adjusting slope parameters， dynamic light field regulation is achieved across transonic and supersonic conditions， effectively reducing optical distortions under different flight mission profiles. Based on Large Eddy Simulation （LES） and ray-tracing methods， a calculation and evaluation model for aero-optical effects is established to compare the performance of variable-slope Ramp-VG arrays under different flight speeds. The results demonstrate that Ramp-VG arrays adapted to boundary layer characteristics can effectively improve the flow characteristics over the optical window， delay turbulent transition， and significantly suppress optical distortions caused by flow separation and turbulence development at the rear edge of recessed windows. At Ma=3.2， a 5° Ramp-VG reduces wavefront distortion by 24.6%， while a 15° Ramp-VG at Ma=2 achieves a distortion suppression rate of 46.5%. Furthermore， the study reveals the flow field and optical field regulation mechanisms of variable-slope Ramp-VG arrays and proposes a light field regulation strategy. This provides new insights for optimizing optical performance under different Mach numbers， flight altitudes， and imaging modes， as well as for designing optical windows under complex flight conditions.
Jianwei SUN , Siyuan XING , Jiandong TIAN , Yongming YANG , Dapeng TIAN . Aero-optical effect regulation of supersonic vehicles based on variable-slope Ramp-VG arrays[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(22) : 131839 -131839 . DOI: 10.7527/S1000-6893.2024.31839
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