| The high-altitude,humid cold air can easily cause the aircraft wings and other key components to freeze,destroy the aerodynamics of the aircraft,and then seriously threaten its safe flight.In recent years,the Surface Dielectric Barrier Discharge(SDBD)plasma anti-icing technology,as a new and efficient active anti-icing method,has received an extensive attention from scholars at home and abroad.Meanwhile,due to the limited energy storage of some aircrafts,the development of low-energy SDBD plasma anti-icing technology is particularly important.The ns-SDBD plasma has a certain anti-icing feasibility because of its fast response,low energy consumption,and easy automation.Therefore,it is necessary to perform the development and experimental research of the ns-SDBD plasma anti-icing device,which will help the airborne process of this technology.This paper is oriented to the needs of a type of all-weather small UAV airborne load and anti-icing experiment,closely focusing on the three most important indicators such as aircraft load,energy consumption and anti-icing effectiveness,and designs and develops a set of ns-SDBD plasma anti-icing devices.Based on the results of the anti-icing experiment in the artificial climate chamber,the effectiveness of the device’s anti-icing was preliminarily verified.The research mainly includes the following points:Firstly,a lightweight ns-SDBD plasma drive source that meets the requirements of the airborne was developed.The all-solid-state Marx topology was used as the main circuit of the ns-SDBD drive source to solve the current sharing problem of the MOSFET main switch under high-voltage and high-current conditions;a set of high-reliability and wide-parameter adjustable micro-control systems and control signal filtering solutions were designed,which solves the problem of space radiation interference and line crosstalk caused by strong transient electromagnetic environment to control signals.Additionally,a set of high-repetition nanosecond pulse generator prototype with 8k V voltage output,200 A maximum output current,and 20 k Hz re-frequency working capability were developed,achieving the design goals of lightweight,wide parameters,and high reliability.Secondly,the design of ns-SDBD plasma actuator was carried out.The plasma excitation intensity comparison experiment was carried out according to the blocking dielectric material,material thickness and exposed electrode configuration of the actuator.Based on the experimental results,the ns-SDBD plasma actuator in the anti-icing device was designed.Then the relevant electrical characteristics of the actuator were further studied through theoretical calculation,equipment measurement and experimental fitting,which played a certain guiding role in the optimization and improvement of the actuator.Finally,an anti-icing device was constructed based on the nanosecond pulse generator prototype and ns-SDBD plasma actuator,and the static temperature rise experiment of ns-SDBD plasma was carried out to study the influence of different pulse parameters on the temperature rise of ns-SDBD plasma;meanwhile,the anti-icing experiment in the artificial climate chamber proved the anti-icing effectiveness of ns-SDBD plasma,and the principle of ns-SDBD plasma anti-icing was analyzed preliminarily.Combined with FLUENT simulation software,the thermal performance of ns-SDBD plasma was analyzed,and the thermal performance of ns-SDBD plasma under different flow fields was explored,which further proved the anti-icing performance of ns-SDBD plasma.The ns-SDBD plasma anti-icing device developed in this paper meets the relevant parameters of the airborne experiment.The preliminary experimental results of the artificial climate chamber can prove that the device has good anti-icing performance,and can meet the anti-icing requirements under different environmental conditions.It is expected to provide certain theoretical and practical guidance for the airborne process of ns-SDBD plasma anti-icing technology. |
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