Replacement for the failed LDV system at University of Windsor

更换温莎大学发生故障的 LDV 系统

• 批准号: RTI-2020-00038
• 负责人: Balachandar, Ramaswami
• 金额: $ 8.21万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=692984
• 关键词: Replacement; failed; LDV; system; University

Measurements of velocity and turbulence are required to properly model both internal and external flows. These include flow in rivers, effluent discharge of wastewater, flow past buildings, etc. In most cases, these flows are three dimensional and turbulent, which means the mixing is largely due to small scale chaotic behaviour of the fluid where the velocity fields are varying in space and time. The ability to model these flows and the associated transport phenomena is of critical importance in many applications. Research in the above areas is in progress at the University of Windsor and significant contributions have been made over the last 15 years using a laser Doppler Velocimeter (LDV) system. Velocity data acquired from the LDV system have provided valuable information for complementary validation of computational models of complex flow fields. The LDV was the principal tool used in many graduate theses.******The LDV system at University of Windsor was purchased in 2003. It was our workhorse and a large number of HQP were trained in the use of the system for over 15 years. Currently the LDV system is obsolete due to the complete deterioration of the system. The air-cooled laser has been replaced twice in the past in 2006 and 2009, and is no longer in operation. In 2012, after a decade of extensive usage, the software was updated to comply with the newer computer operating system. Now the lack of availability of hardware components compatible with modern computer operating systems has also become an issue. Over the years, the fiber optic cables have deteriorated and the processor used to extract the data has perished. The manufacturer has indicated that replacement parts are not available and some of the parts, if available are very expensive. Our previous two RTI applications related to the LDV were not funded and the need for funding cannot be over-emphasized.******The proposed equipment grant is requested to support the replacement of the now defunct LDV system. Funds are sought for a new LDV system that is capable of resolving two velocity components and facilitate measurements in air and water. There is an immediate need for purchasing this system as our students from two departments need the LDV capability. Availability of the LDV technology is critically important in the investigation of turbulence structure of free surface flows, 3D jets, wakes and fluid-structure interaction. In the immediate future, the equipment will be used in the following projects: Experimental study of self-aerated free surface flows (2 PhD, 2 MASc); energy exchange between flapping/bending structures (2 MASc); scour studies (1 PDF); cooling applications of impinging jets (1 PhD); bed roughness in open channels (1 PhD). As in the past, the capability to conduct the above studies will enhance our ability to procure additional funding from industrial research partners in Windsor.*****

需要对速度和湍流进行测量，以正确地对内部和外部流进行正确建模。其中包括河流中的流动，废水的废水排放，经过建筑物的流量等。在大多数情况下，这些流量是三维且湍流的，这意味着混合在很大程度上是由于流体的小规模混乱行为，在空间和时间上，速度场在速度场中有所不同。在许多应用中，建模这些流量和相关运输现象的能力至关重要。温莎大学正在进行上述领域的研究，在过去的15年中，使用激光多普勒赛车仪（LDV）系统做出了重大贡献。从LDV系统中获取的速度数据已为复杂流场的计算模型提供了有价值的信息。 LDV是许多研究生论文中使用的主要工具。****** Windsor大学的LDV系统于2003年购买。这是我们的主力军和大量HQP培训了该系统的使用已有1​​5年以上。 目前，由于系统的完全恶化，LDV系统已过时。过去在2006年和2009年，气冷激光已被替换两次，并且不再运行。 2012年，经过十年的广泛使用，该软件已更新以符合较新的计算机操作系统。现在，缺乏与现代计算机操作系统兼容的硬件组件的可用性也已成为一个问题。多年来，光纤电缆已经恶化，用于提取数据的处理器已经灭亡。 制造商表示，替换零件不可用，如果有的话，某些零件非常昂贵。我们的前两个与LDV相关的RTI应用程序没有资助，并且不能过分强调资金。******要求拟议的设备拨款以支持更换现已停产的LDV系统。寻求一种新的LDV系统的资金，该系统能够解决两个速度组件并促进空气和水中的测量。由于两个部门的学生需要LDV功能，因此立即需要购买该系统。 LDV技术的可用性在研究自由表面流，3D喷气机，唤醒和流体结构相互作用的湍流结构中至关重要。在不久的将来，设备将用于以下项目：自动游离自由表面流的实验研究（2 Phd，2 MASC）；拍打/弯曲结构（2 MASC）之间的能量交换；冲洗研究（1 pdf）；撞击喷气机的冷却应用（1 phD）；开放通道中的粗糙度（1 phd）。与过去一样，进行上述研究的能力将增强我们从温莎工业研究伙伴那里获得额外资金的能力。*****