【作者】 庄蒙蒙；

【导师】 周砚江；

【作者基本信息】 浙江理工大学 ， 测试计量技术及仪器， 2012， 硕士

【摘要】 离子风空气加速器技术是空气电晕放电离子风研究领域的一项国际前沿技术。近些年来，国外学者围绕如何提高离子风效应产生的气流速度以及效率等问题，开展了一系列的基础理论研究和应用基础研究，主要内容包括：离子风对电除尘器捕集效率的影响、燃烧控制和强化换热效率等，而在利用离子风效应实现气流加速的研究方面起步较晚。本文基于离子风效应，探索一种与风机、风扇工作原理完全不同的新型气流传输基础部件，为离子风的技术应用开辟一个新途径，为节能环保提供一种新方法。粒子图像测速技术（PIV，Particle Image Velocimetry）是一种基于流场图像互相关分析的二维流场非接触式测试技术，近年来，该技术发展迅速，已成为复杂流场研究领域中一种有效的实验研究手段。本文从分析离子风发生机理出发，综述了国内外离子风研究的状况，阐述了离子风空气加速器的原理、模型及结构；通过对国内外PIV技术在离子风效应实验研究的分析，详述了PIV技术的原理，针对离子风空气加速器内部复杂流场的特点，搭建了用于离子风空气加速器流场研究分析的PIV实验平台，并对其进行了详细分析和论证，该实验系统包括PIV测量装置、高压电源、放电电极与流体通道四部分，通过该实验系统研究了放电场域离子风速度矢量特性及其分布规律，为实现离子风空气加速装置的研究开发提供了理论和实验的依据。本文从流场特性的研究入手，通过所搭建的PIV实验平台，探讨了离子风空气加速器实现气流加速的方法；利用粒子成像技术获得了离子风速度场图像。研究结果显示：在不考虑电晕极之间电场影响的前提下，在高压电源上叠加一微小变化的交流分量，通过改变其幅值和频率，气流速度将有规律地随之变化；在电压参数不变的情况下，离子风速随着极间距离的减小而随之提高；研究结果还表明，对于离子风空气加速器内部的复杂流场，PIV技术是一种行之有效的全流场测量方法。本文研究了不同的电压波动（幅值和频率）以及不同的电极结构下离子风的速度分布及流场性质，分析离子风作用机制。本文研究成果有助于获得更大的离子风速度，对于后续的研究具有重要的指导意义。更多还原

【Abstract】 Ionic wind air accelerator research is one branch of air corona discharged ionic windtechnology. In recent years, scholars at home and abroad are carrying out a series of basicaltherory and its applied research on how to improve air flow speed and efficiency of ionicwind.The main contents of ionic wind include the impact of ionic wind on ESP collectioneffiency, combustion control and the effiency of enhancing heat transferring.However, theresearch of ionic wind used for ionic flow accelerating started much later. One new kind of gastransmissed infrastructure components based on the ionic wind technology is investigated. Thework principle of ionic wind air accelerator is completely different from the common fan. Itwill open up a new way for the engineering application of ionic wind and provide a newmethod for energy savings and environment protection.The particle image velocimetry (PIV) is an two-dimensional flow non-contacted testingtechnique based on the cross-correlation analysis of the fluid flow images,in recent years, itsapplied range has covered widely. PIV has became a kind of effective means for the researchfield for complex flow field.By analyzing the mechanism of ionic wind, the research reviewsof ionic wind from domestic and foreign is summarized, the principle、model and structure ofionic wind air accelerator is explained;by analysising the study status of ionic wind by meansof PIV technology at home and abroad, the principle of PIV technology is detailed in thethesis. According to the characteristic of flow field on ionic wind air accelerator, the PIVexperimental platform was built and the detailed analysis and verification were done. Theexperimental platform include measuring devices, high voltage power supply、dischargedelectrode and the fluid channel. The characteric of ionic wind velocity in the discharge field andthe regularity distribution is studied by PIV system experimental platform. In the paper, theeffect of tiny change of high voltage power supply and polar distance altering are studied,which provide theoretical ground and experimental base for the research and development forionic wind air accelerating device. In this thesis, the factors of ionic wind accelerator achieving the air flow acceleratingfrom the perspective of studying flow field was studied through the PIV experimental platform;a clear and accurate ionic wind velocity field image was achieved by using PIV particleimaging from the point of view of the characteristics of the flow field. This paper studiesvelocity distribution and flow field properties under different voltage fluctuations (includingamplitude and frequency) and different polar distance. The research results showed that oncondition that without considering the impact of electric field between polars, at both ends of ahigh voltage power supply, small changes of AC component was superposition (includingchanges in its amplitude and frequency), along with changes in flow velocity; under thecondition of voltage parameters invariable, the ionic velocity improved as the distance betweenthe poles decreases subsequently; PIV technology measurements is an effective techniquemethod for the whole flow field measurements. Analyzing the action range and mechanism ofionic wind contributes to acquiring greater wind speed, which has a strong significance on thefollowing-up study.更多还原