Replacement of the new wave research solo PIV Nd:YAG laser

替代新浪潮研究型SOLO PIV Nd:YAG 激光器

• 批准号: 360498-2008
• 负责人: Balachandar, Ramaswami
• 金额: $ 2.49万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=362719
• 关键词: Replacement; new; wave; research; solo

It has been a common practice to discharge water, wastewater and industrial effluents into open channels such as rivers.  The ability to model these flow systems and the associated transport is of critical importance in understanding the environmental impact of such discharges.  Amongst industrial processes, spray technology has a wide range of applications and efforts to increase efficiency (for e.g., combustion in the case of fuel sprays or reduction in drift in the case of agrochemicals or paint sprays) will lead to economic & environmental benefits.  In most cases, the flows are turbulent, which means the mixing is largely due to small-scale chaotic behaviour of the fluid.  To better understand and control the above mentioned flows/processes, knowledge of the velocity field and particle size is an essential ingredient.  Research in this area is in progress at the University of Windsor using laser based non-intrusive instrumentaion such as the Particle Image Velocimetry (PIV).  In addition, PIV can be very helpful in particle size characterization, and flow visualization by means of light induced fluorescence. Amongst immediate applications, an innovative physio-chemical process has been recently developed at the University for the treatment of combined sewer overflow.     The proposed equipment grant is requested to support the replacement of the failed laser in the PIV system in order to make the system operable.  Further a higher power laser (120 mJ/pulse) is being sought to replace the 50 mJ/pulse laser.  This will: (i) enhance the quality of the velocity data being acquired, (ii) be able to measure smaller particle size in spray studies and (iii) enhance flow visualization using planar light induced fluorescence.  There is an immediate need for this upgrading as five students from two departments need the upgraded system.  In the immediate future, the equipment will be used in the following projects: effect of roughness in open channel flows, (2 PhD students, applicant's Discovery grant), mixing in treatment systems (1 MASc student) and intake studies (1 MASc student).  The capability to conduct spray studies (1 post-doc) will enhance our capability to procure additional funding from the automotive industry in Windsor.

将水、废水和工业废水排放到河流等明渠中是一种常见的做法。  对这些流动系统和相关运输进行建模的能力对于了解此类排放对环境的影响至关重要。  在工业过程中，喷雾技术具有广泛的应用，提高效率的努力（例如，燃料喷雾的燃烧或农用化学品或油漆喷雾的漂移减少）将带来经济和环境效益。  在大多数情况下，流动是湍流，这意味着混合很大程度上是由于流体的小规模混沌行为造成的。  为了更好地理解和控制上述流动/过程，速度场和颗粒尺寸的知识是一个重要因素。  温莎大学正在利用基于激光的非侵入式仪器（例如粒子图像测速仪 (PIV)）进行该领域的研究。  此外，PIV 在颗粒尺寸表征和通过光诱导荧光进行流动可视化方面非常有帮助。在直接应用中，大学最近开发了一种创新的物理化学工艺，用于处理合流下水道溢流。     请求拟议的设备拨款来支持更换 PIV 系统中出现故障的激光器，以使系统能够运行。  此外，正在寻求更高功率的激光器（120 mJ/脉冲）来取代 50 mJ/脉冲激光器。  这将：（i）提高所采集的速度数据的质量，（ii）能够在喷雾研究中测量更小的颗粒尺寸，以及（iii）使用平面光诱导荧光增强流动可视化。  由于来自两个系的五名学生需要升级系统，因此迫切需要进行此升级。  在不久的将来，该设备将用于以下项目：明渠水流中粗糙度的影响（2名博士生，申请人的发现补助金）、处理系统中的混合（1名硕士生）和摄入研究（1名硕士生）。  进行喷涂研究的能力（一名博士后）将增强我们从温莎汽车行业获得额外资金的能力。