高速空气舵横-逆向双射流耦合流动控制及降热特性

doi:10.7527/S1000-6893.2026.33348

Abstract

Abstract:

The multi-scale flow coupling effects induced by Shock Wave/Boundary Layer Interaction （SWBLI） in hypersonic flows significantly exacerbate the challenges of thermal load management for flight vehicles. A transverse-opposing dual-jet active control scheme for air rudder is proposed， and its impact characteristics on SWBLI and aerothermal environments under complex inflow conditions is revealed. The numerical methods employed are validated against experimental data from open literature， and a grid independence analysis is conducted. Results indicate that the transverse-opposing dual-jet scheme achieves global heat reduction superior to single-jet configurations through spatially coupled configurations. Under the condition of an 11° rudder deflection， positioning the transverse jet further upstream and the opposing jet at a higher elevation constructs a large-scale separation zone that isolates the high-temperature mainstream. Consequently， the peak heat fluxes on the leading edge and the plate are controlled below 3 200 kW·m^-2 and 300 kW·m^-2， respectively. At an angle of attack of 11°， all dual-jet configurations significantly reduce the gap heat flux to below 300 kW·m^-2. However， the leading-edge heat flux is sensitive to jet positioning； it is crucial to ensure the opposing jet remains within the low-pressure wake of the transverse jet to prevent severe flow reattachment and a subsequent surge in heat flux.

Key words: shock wave/boundary layer interaction, air rudder, transverse-opposing jets, active flow control, aerothermal environment

CLC Number:

V211.3

Junheng LUO, Qingyang GUO, Lin WANG, Bing LIU, Shibin LI. Coupled flow control and heat reduction characteristics of transverse-opposing dual-jets for high-speed air rudder[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(13): 533348.

Figures/Tables 26

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参数	数值
顶面长度L₁/mm	120
底面长度L₂/mm	200
舵轴与后端水平距离L₃/mm	60
顶部厚度D₁/mm	6
舵体高度K/mm	80
舵轴直径d/mm	16
底部厚度D₂/mm	20
前缘半径R/mm	2
舵轴高度b/mm	2
喷孔半径r/mm	1
逆向射流垂直高度H/mm	20， 40
横向射流水平距离L/mm	80， 240
后掠角β/（°）	45

Case	i	j
Case 1	1	0.25
Case 2	1	0.50
Case 3	3	0.25
Case 4	3	0.50

Coupled flow control and heat reduction characteristics of transverse-opposing dual-jets for high-speed air rudder

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