Supersonic Windtunnel Digital Measurement and Imaging Laboratory

超音速风洞数字测量与成像实验室

• 批准号: 8853306
• 负责人: Tim Turner
• 金额: $ 2.68万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-15 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8853306&HistoricalAwards=false
• 关键词: Supersonic; Windtunnel; Digital; Measurement; Imaging

Equipment to improve an undergraduate laboratory in the thermal and fluid sciences will be provided. In light of our nation's renewed interest is supersonic and hypersonic flight, the teaching of compressible fluid mechanics is of paramount importance. In addition, the rapid pace of technology has given the science and engineering community new tools with which the student must be familiar. The Supersonic Windtunnel Digital Measurement and Imaging Laboratory satisfies these two needs in a unique way. The heart of the project is a high Reynolds number, supersonic windtunnel, exhausting to atmospheric pressure and capable of attaining Mach 2.5 and Reynolds numbers exceeding one million. It is a blowdown facility that relies on modern, fast-response, computer-controlled instrumentation. Since the typical run time is only a few seconds, only instruments capable of quickly making and storing measurements are useful. The main instruments required are a multiple-channel pressure scanner, a digital computer for control, data acquisition, and analysis, and the equipment making up the unique digital imaging unit. The purpose of this last unit is to take snapshots of the flow in one of several useful optical modes (e.g., Schlieren to observe the shock structure, and shadowgraphy for single gas turbulence or multiple gas mixing). A pulse YAG laser illuminates the flow periodically, then the image is captured by a CCD camera, digitized, and stored in the controlling computer which allows subsequent image processing of the data.

设备，以改善本科实验室在热和 将提供流体科学。 鉴于我们国家的复兴 兴趣是超音速和高超音速飞行，教学， 可压缩流体力学是极其重要的。 此外，本发明还提供了一种方法， 科技的快速发展使科学和工程 学生必须熟悉的社区新工具。 的 超音速风洞数字测量与成像实验室 以一种独特的方式满足这两种需求。 项目的核心 是一个高雷诺数，超音速风洞，用尽， 大气压力，能够达到2.5马赫和雷诺数 人数超过一百万。 这是一个排污设施， 现代化的快速反应的电脑控制仪器。 以来 典型的运行时间只有几秒钟，只有仪器能够 快速进行和存储测量是有用的。 主要 所需的仪器是多通道压力扫描仪， 用于控制、数据采集和分析的数字计算机，以及 组成独特数字成像单元的设备。 的目的 最后一个单元是在几个单元中的一个单元中拍摄流的快照， 有用的光学模式（例如，纹影来观察激波结构， 以及用于单气体湍流或多气体混合的阴影照相术）。 一 脉冲YAG激光周期性地照射流动， 由CCD摄像机捕获，数字化，并存储在控制系统中。 计算机，它允许对数据进行后续图像处理。