高速再入飞行器等离子体实时诊断技术OA

During the reentry of high-speed vehicles into the atmosphere,shock wave compression and viscous stagnation effects cause a sharp temperature rise in the shock layer,leading to the formation of a plasma sheath and consequently triggering the"communication blackout"phenomenon.The fundamental research basis for addressing this issue lies in achieving accurate diagnosis of plasma parameters.However,the existing diagnostic techniques is hard to meet the engineering requirements of a 1 600℃high-temperature environment and dynamic real-time measurements simultaneously.Therefore,a dual flush-mounted probe diagnostic system with conformal design on the vehicle's outer surface proposed.Through material optimization of high-temperature-resistant electrodes,housing,insulating base,and high-temperature sealant,combined with the design of a miniaturized,low-power,high-precision real-time diagnostic device,the system can adapt to payload installation constraints while enabling real-time electron density measurements within the range of 109～1013 cm-3.Arc-heated wind tunnel tests demonstrate that the diagnostic results of this probe system are consistent in order of magnitude with those of conventional electrostatic probes under identical test conditions,while exhibiting no flow-field interference or thermal ablation effects.This research provides an effective engineering solution for real-time plasma parameter diagnosis in high-speed reentry vehicles,offering significant practical value for blackout mechanism studies and communication optimization.