Particle Image Velocimetry System

粒子图像测速系统

• 批准号: RTI-2023-00508
• 负责人: Sumner, David
• 金额: $ 10.93万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760289
• 关键词: Particle; Image; Velocimetry; System

Funding is requested for a new particle image velocimetry (PIV) system that will be shared by researchers in mechanical and civil engineering in the wind tunnel and hydraulics laboratories at the University of Saskatchewan. PIV is a de facto laboratory standard for making air and water velocity measurements in complex three-dimensional turbulent flows. When PIV is used in a wind tunnel, the airflow is uniformly seeded with small droplets, the flow and droplets are illuminated with a laser light sheet, and the flow is imaged with a digital camera. PIV software then computes the fine details of the fluid motion at thousands of points within a plane in the flow field at one instant in time. Ultimately, PIV provides researchers with a time sequence of velocity fields within a plane in a flow. The high spatial resolution of the measurements allows researchers to study the fine details of the fluid motion. In the case of flow in a water channel, the PIV technique is the same, but the flow is uniformly seeded with small spherical particles instead of droplets. Engineering graduate students supervised by the applicants are trained on the use of PIV and employ this instrumentation in their research. Our research programs in the fields of fluid mechanics, aerodynamics, and hydraulics are helping to solve problems in the areas of aviation, agriculture, protection of water quality, and public safety. The research outcomes will impact efforts to reduce energy consumption and emissions in the aviation industry, reduce energy use and improve crop yields in large-scale agricultural applications, improve the design of storm water retention ponds to reduce impacts of pollution on our waterways, and improve public safety at dams. We note that energy, agriculture, and water security are key areas for Canada's future prosperity. The new PIV system will replace our aging PIV system (more than 20 years old) that is close to the end of its useful life, can no longer be upgraded, and for which there is no longer any technical support or maintenance services available from the manufacturer. Our laser is currently operating at only 60% of its rated power, despite replacing some of its key components, and this severely limits the types of measurements we are able to make. Our aging PIV system is heavily used and there are no similar systems at our university nor, to our knowledge, actively being used in our entire province. There is an immediate need for funds to purchase a new PIV system so as not to delay or disrupt the research and degree programs of our current graduate students, in the event that additional components of our aging system lose additional power or fail to operate. PIV is also a key component of our training program for our graduate students, as they prepare to enter the engineering workforce or begin careers in research.

需要为新的粒子图像测速（PIV）系统提供资金，该系统将由萨斯喀彻温大学风洞和液压实验室的机械和土木工程研究人员共享。 PIV 是事实上的实验室标准，用于在复杂的三维湍流中进行空气和水的速度测量。当PIV用于风洞时，气流中均匀地撒有小液滴，用激光片照射气流和液滴，并用数码相机对气流进行成像。然后，PIV 软件会计算某一时刻流场平面内数千个点处流体运动的精细细节。最终，PIV 为研究人员提供了流动平面内速度场的时间序列。测量的高空间分辨率使研究人员能够研究流体运动的细节。对于水道中的流动，PIV 技术是相同的，但流动均匀地接种了小球形颗粒而不是液滴。申请人指导的工程研究生接受了 PIV 使用培训，并在他们的研究中使用该仪器。我们在流体力学、空气动力学和液压领域的研究项目正在帮助解决航空、农业、水质保护和公共安全领域的问题。研究成果将影响减少航空业能源消耗和排放的努力，减少大规模农业应用中的能源使用和提高农作物产量，改进雨水滞留池的设计以减少污染对我们水道的影响，并改善大坝的公共安全。我们注意到，能源、农业和水安全是加拿大未来繁荣的关键领域。新的 PIV 系统将取代我们老化的 PIV 系统（超过 20 年），该系统已接近其使用寿命，无法再升级，并且不再提供任何技术支持或维护服务。制造商。尽管更换了一些关键组件，但我们的激光器目前仅以其额定功率的 60% 运行，这严重限制了我们能够进行的测量类型。我们老化的 PIV 系统被大量使用，我们大学没有类似的系统，据我们所知，在我们整个省都没有积极使用。我们迫切需要资金购买新的 PIV 系统，以免在我们老化系统的其他组件失去额外电力或无法运行的情况下，延迟或扰乱我们当前研究生的研究和学位课程。 PIV 也是我们研究生培训计划的重要组成部分，帮助他们准备进入工程队伍或开始研究生涯。