超声速振荡射流实验研究+文献综述
时间:2018-07-18 14:55 来源:毕业论文 作者:毕业论文 点击:次
| 摘要作为主动流动控制激励器的射流振荡器在射流混合增强、分离控制、推力矢量和噪声抑制等领域具有广阔的应用前景。目前针对射流振荡器的研究主要集中于亚声速流动范围，对其超声速流动特性和流动控制应用研究很少。作为射流振荡器类型之一的凹腔共振振荡器具有结构简单、振荡频率稳定等特点，本文以超声速凹腔共振振荡射流为主要研究对象，设计实验台，并进行数值模拟，重点针对振荡射流的混合特性、频率特性和流场特性开展实验研究。25825 文章首先对超声速振荡射流实验台进行结构设计与三文建模，并通过气体动力学函数进行相关尺寸确定，最后使用Fluent软件对实验段内流场进行数值仿真，并根据仿真结果分析流场内静压，温度，马赫数等特性。 希望本实验的开展将拓展对振荡射流机理的认识，并为凹腔共振振荡射流的进一步流动控制应用研究打下基础。 关键词： 振荡射流，三文建模，数值仿真，流场特性 毕业论文设计说明书外文摘要 Title The Experiment of Supersonic Oscillating Jet Abstract As active flow control actuator, the fluidic oscillator, has a broad application prospect in jet mixing enhancement, in the field of separation control, thrust vectoring and restraining the noise. Currently research on jet oscillator mainly concentrated on subsonic flow range, the ultrasonic velocity of flow characteristics and flow control applications are rarely studied. As one of the fluidic oscillator ,the cavity resonance oscillator has many advantages ,such as simple structure, steady oscillation frequency characteristics, in this paper ,the supersonic cavity resonance oscillation jet is intended to be the main research object, the experimental platform is designed and the numerical simulation is carried out, and the experimental study is focused on the mixing, frequency and flow characteristics of the oscillating jet.. Firstly of supersonic jet oscillation experiments were structural design and three-dimensional modeling, then the determination of the related dimensions with the help of aerodynamics functions,finally, on the flow field numerical simulation is carried out using the FLUENT software, and analysis of the static pressure in the flow field , the temperature, Mach number and other characteristics according to the simulation results. It is hoped that the development of this experiment will expand the understanding of the oscillating jet mechanism and lay the foundation for the further research on the application of the cavity oscillating jet. Keywords: oscillating jet, 3D modeling, numerical simulation, flow field characteristics 目 次 1 绪论 1 1.1研究背景及意义 1 1.2 国内外研究现状分析 2 1.2.1振动式风力发电机风力机及风能采集的研究概况 2 1.2.2 冲击射流非稳定性在军事及工业上的应用概况 3 1.2.3 冲击射流非稳定性及其与弹性体耦合振动技术研究状况 5 1.3本文研究内容 6 1.3.1概述 6 1.3.2实验仪器背景介绍 6 1.4 本章小结 8 2. 实验台设计及说明 9 2.1 总体实验模型介绍 9 2.2 实验模型分零件介绍 10 2.2.1 实验段部分 10 2.2.2 侧壁 11 2.2.3 光学玻璃 11 2.2.4玻璃边框 12 2.2.5 方法兰 13 2.2.6底座与支撑架 14 2.3实验测量仪器介绍 14 (责任编辑：qin) |