Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-11-14 DOI:10.1088/2058-6272/ad0c99

Ziqi Fang, Haohua Zong, Yun Wu, Hua Liang, Zhi Su

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引用次数: 0

Abstract

Abstract To improve the cruise flight performance of aircraft, two new configurations of plasma actuators (grid-type and super-dense array) were investigated to reduce the turbulent skin friction drag of a low-speed airfoil. The induced jet characteristics of the two actuators in quiescent air were diagnosed with high-speed particle image velocimetry (PIV), and their drag reduction efficiencies were examined under different operating conditions in a wind tunnel. The results showed that the grid-type plasma actuator was capable of producing a wall-normal jet array (peak magnitude: 1.07 m/s) similar to that generated in a micro-blowing technique, while the super-dense array plasma actuator created a wavy wall-parallel jet (magnitude: 0.94 m/s) due to the discrete spanwise electrostatic forces. Under a comparable electrical power consumption level, the super-dense array plasma actuator array significantly outperformed the grid-type configuration, reducing the total airfoil friction drag by approximately 22% at a free-stream velocity of 20 m/s. The magnitude of drag reduction was proportional to the dimensionless jet velocity ratio (r), and a threshold r = 0.014 existed under which little impact on airfoil drag could be discerned.

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基于栅格型和超密阵列等离子体作动器的翼型摩擦减阻

摘要为了提高飞机的巡航飞行性能，研究了两种新型等离子体作动器结构(栅格型和超密阵列)，以减小低速翼型湍流蒙皮摩擦阻力。采用高速粒子图像测速技术(PIV)对两种致动器在静止空气中的诱导射流特性进行了诊断，并在风洞中测试了两种致动器在不同工况下的减阻效率。结果表明:栅格型等离子体致动器可产生与微吹技术类似的壁向法向射流阵列(峰值量级为1.07 m/s)，而超致密阵列等离子体致动器由于其展向静电力离散，可产生波浪形壁向平行射流(峰值量级为0.94 m/s)。在相当的电力消耗水平下，超密集阵列等离子体执行器阵列的性能明显优于网格型配置，在20米/秒的自由流速度下，将总翼型摩擦阻力降低了约22%。阻力减小的幅度与无量纲射流速度比(r)成正比，存在一个阈值r = 0.014，在该阈值下翼型阻力的影响很小。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.