线对二滴等离子推进器:用于微型飞行器推进的电空气动力射流的实验和数值研究

IF 4.1 2区 工程技术 Q1 MECHANICS
Mahdy Ahangar, Narges Alebrahim
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引用次数: 0

摘要

传统的微型飞行器(MAVs)主要依靠复杂的拍翼机构进行推进,在可靠性和效率方面往往表现出局限性。为了克服这些挑战,本研究探索了电空气动力(EAD)推进器作为新型推进系统的潜力。通过离子碰撞加速空气分子,EAD 喷射流产生推力,由于其无运动部件设计,具有无噪音运行和零排放等优点。本研究对线对双滴推进器配置进行了全面的实验和数值研究,以阐明其机电性能、等离子体流动力学和 EAD 喷射特性。对电流、推力、功率和效能等关键参数的实验测量结果与数值模拟结果进行了关联,结果表明两者非常吻合,最大误差低于 5%。这些发现与已建立的理论框架非常吻合,揭示了效能与推力之间的反平方根关系。为优化推进器性能,确定了电极间隙距离为 10、15 和 20 毫米时的最佳工作电压,分别约为 8.2、9.4 和 11.6 千伏,从而实现了推力和效能之间的平衡权衡。等离子体流场的详细数值可视化,包括速度分布、射流形态、电势分布和电场线,为推进器的运行提供了宝贵的见解。在这些洞察力的基础上,我们建造并测试了一个概念验证型 EAD 飞行器,该飞行器采用了锯齿状发射器电极和轻质材料。该飞行器的质量为 0.5 克,在 15 千伏电压下产生的推力为 0.77 克,推重比为 1.54,并成功升空。该演示突出了 EAD 推进在实际 MAV 应用中的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Wire-to-two-drop plasma thruster: Experimental and numerical investigation of electroaerodynamic jet flow for micro aerial vehicle propulsion
Conventional micro aerial vehicles (MAVs) have primarily relied on complex, flapping-wing mechanisms for propulsion, often exhibiting limitations in terms of reliability and efficiency. To overcome these challenges, this study explores the potential of electroaerodynamic (EAD) thrusters as a novel propulsion system. By accelerating air molecules through ion collisions, EAD jet flow generates thrust, offering advantages such as noiseless operation and zero emissions due to its moving-part-free design. This research presents a comprehensive experimental and numerical investigation of a wire-to-two-drop thruster configuration to elucidate its electromechanical performance, plasma flow dynamics, and EAD jet characteristics. Experimental measurements of key parameters, including current, thrust, power, and effectiveness, were correlated with numerical simulations, demonstrating excellent agreement with a maximum error below 5%. These findings align strongly with established theoretical frameworks, revealing an inverse square root relationship between effectiveness and thrust. To optimize thruster performance, optimal operating voltages were identified at approximately 8.2, 9.4, and 11.6 kV for inter-electrode gap distances of 10, 15, and 20 mm, respectively, achieving a balanced trade-off between thrust and effectiveness. Detailed numerical visualizations of the plasma flow field, including velocity distribution, jet morphology, potential distribution, and electric field lines, provided valuable insights into the thruster's operation. Building upon these insights, a proof-of-concept EAD flier was constructed and tested, incorporating a serrated emitter electrode and lightweight materials. This flier achieved a mass of 0.5 g and generated a thrust of 0.77 g at 15 kV, resulting in a thrust-to-weight ratio of 1.54 and successful liftoff. This demonstration highlights the potential of EAD propulsion for practical MAV applications.
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来源期刊
Physics of Fluids
Physics of Fluids 物理-力学
CiteScore
6.50
自引率
41.30%
发文量
2063
审稿时长
2.6 months
期刊介绍: Physics of Fluids (PoF) is a preeminent journal devoted to publishing original theoretical, computational, and experimental contributions to the understanding of the dynamics of gases, liquids, and complex or multiphase fluids. Topics published in PoF are diverse and reflect the most important subjects in fluid dynamics, including, but not limited to: -Acoustics -Aerospace and aeronautical flow -Astrophysical flow -Biofluid mechanics -Cavitation and cavitating flows -Combustion flows -Complex fluids -Compressible flow -Computational fluid dynamics -Contact lines -Continuum mechanics -Convection -Cryogenic flow -Droplets -Electrical and magnetic effects in fluid flow -Foam, bubble, and film mechanics -Flow control -Flow instability and transition -Flow orientation and anisotropy -Flows with other transport phenomena -Flows with complex boundary conditions -Flow visualization -Fluid mechanics -Fluid physical properties -Fluid–structure interactions -Free surface flows -Geophysical flow -Interfacial flow -Knudsen flow -Laminar flow -Liquid crystals -Mathematics of fluids -Micro- and nanofluid mechanics -Mixing -Molecular theory -Nanofluidics -Particulate, multiphase, and granular flow -Processing flows -Relativistic fluid mechanics -Rotating flows -Shock wave phenomena -Soft matter -Stratified flows -Supercritical fluids -Superfluidity -Thermodynamics of flow systems -Transonic flow -Turbulent flow -Viscous and non-Newtonian flow -Viscoelasticity -Vortex dynamics -Waves
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