基于变坡度Ramp-VG阵列的超声速飞行器气动光学效应调控

doi:10.7527/S1000-6893.2024.31839

Abstract

Abstract:

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.

Key words: supersonic vehicles, aero-optical effects, morphing aircraft, wavefront distortion, Ramp-VG Arrays

CLC Number:

V249.3

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 Aeronautica et Astronautica Sinica, 2025, 46(22): 131839.

Figures/Tables 15

Fig.1

Fig.2

Fig.3

Fig.4

Table 1

Results of mesh independence verification

网格规模

（10⁶单元数）

阻力

系数 $C D$

Δ L o p t, r m s

/nm

$C D$ 相对

误差/%

$Δ L o p t, r m s$ 相

对误差/%

1.07

0.292

32.12

2.10

0.266

27.32

8.90

14.94

3.20

0.256

25.41

3.75

6.99

Table 1

Fig.5

Fig.6

Fig.7

Fig. 8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

References 25

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Aero-optical effect regulation of supersonic vehicles based on variable-slope Ramp-VG arrays

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