纳秒脉冲等离子体流动控制及防冰数值模拟

发布时间：2018-02-27 17:51

本文关键词： 等离子体介质阻挡放电流动控制翼型结冰翼型防冰　出处：《西北工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：作为一种新概念的主动流动控制技术,等离子体流动控制具有尺寸小、重量轻、反应迅速、频带响应宽等优势,已在国内外成为了热门的研究课题。纳秒脉冲介质阻挡放电(NSDBD)是近几年提出的新型等离子体流动控制技术,通过快速放电加热局部流动,形成流场扰动,能有效控制低速、高速边界层分离,同时考虑到NSDBD工作中产生的高温高压作用,将其应用到翼型防冰领域。本文的主要工作分为两部分。第一部分工作为纳秒脉冲等离子体控制翼型流动分离的数值模拟研究。采用NSDBD非均匀单区唯相学模型与流动方程耦合的模拟方式,获得了与实验结果一致的压缩-膨胀波的波形结果。模拟了NSDBD对不同雷诺数下翼型大迎角分离的控制效果,探究了其控制翼型流动分离的机理。同时研究了NSDBD等离子体激励强度和激励频率等因素对流动控制效果的影响,给出了不同雷诺数下NSDBD激励参数与激励效果的对应关系。第二部分工作为纳秒脉冲等离子体翼型防冰的数值模拟研究。发展了二维翼型结霜冰的非定常算法,数值模拟了典型霜冰条件下翼型的结冰特性,并分析了积冰对翼型气动特性的影响。耦合NSDBD唯相学能量模型,数值模拟了其在翼型防冰中的效果,分析得出其防冰机理主要包括两方面:1)近壁面冲击波流动效应;2)近壁区域和表面高温、蒸发效应。研究了NSDBD等离子体电极分布、激励强度和激励频率等因素对翼型防冰效果的影响。
[Abstract]:As a new concept of active flow control technology, plasma flow control has the advantages of small size, light weight, rapid response, wide frequency band response and so on. Nanosecond pulse dielectric barrier discharge (NSDBD) is a new plasma flow control technology proposed in recent years. It can effectively control low velocity by heating local flow by rapid discharge. High speed boundary layer separation, taking into account the high temperature and high pressure effect in NSDBD operation, The main work of this paper is divided into two parts. The first part is the numerical simulation of flow separation of airfoil controlled by nanosecond pulsed plasma. The NSDBD nonuniform single-zone phaseology model is used to simulate the flow separation of airfoil. The simulation of the coupling of flow equations, The waveforms of compression-expansion wave are obtained in accordance with the experimental results. The control effect of NSDBD on the separation of airfoils at high angle of attack at different Reynolds numbers is simulated. The mechanism of controlling the flow separation of airfoil is discussed, and the influence of NSDBD plasma excitation intensity and excitation frequency on the flow control effect is also studied. The relationship between NSDBD excitation parameters and excitation effect at different Reynolds numbers is given. In the second part, the numerical simulation of nanosecond pulsed plasma airfoils is carried out, and the unsteady algorithm for frosting of two-dimensional airfoils is developed. The icing characteristics of airfoil under typical frost ice condition are numerically simulated, and the influence of ice accumulation on aerodynamic characteristics of airfoil is analyzed. The coupled NSDBD phase-only energy model is used to simulate the effect of icing on airfoil anti-icing. The results show that the antiicing mechanism mainly includes two aspects: 1) the shock wave flow near the wall and 2) the high temperature and evaporation effect in the near wall and surface. The distribution of NSDBD plasma electrode is studied. The effect of excitation intensity and frequency on the anti-ice effect of airfoil.
【学位授予单位】：西北工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V211.41;V321.229

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